When performing a scientific study the observable must be able to
Answers
When performing a scientific study, the observable must be able to be measured, quantified, or otherwise detected using reliable and valid methods.
In scientific research, it is essential to select observables that can be objectively measured or observed. This allows for the collection of empirical data that can be analyzed statistically and tested for significance. Observables should be observable, meaning they can be directly perceived or detected through the senses or instruments. For example, if studying the effect of a new medication on blood pressure, the observable would be the measurement of blood pressure using a sphygmomanometer or other reliable equipment. This observable can be quantified in terms of numerical values, such as systolic and diastolic pressure readings. The ability to measure or detect the observable is crucial for ensuring the study's reliability, validity, and replicability. By employing measurable observables, scientists can gather objective data, analyze it statistically, and draw meaningful conclusions about the phenomena under investigation.
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Related Questions
(I will mark brainliest please help!)
1) Which fossil fuel is used to make plastics, Vaseline, and even things like lipstick?
Group of answer choices
coal
oil
natural gas
the sun
2) Using coal for energy can be damaging to the environment because
Group of answer choices
Coal mining require digging deep into Earth’s crust which causes fracking
Leaks during mining can cause spills that pollute the
Many coal plants have had accidents that released radiation into the air.
Coal mining and usage causes much water, land, and air pollution.
3) Which would be the best way for a company to reduce energy usage in its office and have the least effect on employees?
Group of answer choices
Remove half the light bulbs in each office and allow employees to bring battery powered flashlights
Turn off heat/air systems and unplug electrical items while the office is closed
Replace the microwave in the office break room with a charcoal grill
Go paperless on Tuesdays
Answers
Answer:
1. Natural Gas
2. 4
3. 3
Explanation:
Hope This Helps
A silver coin rubs vigorously against a wool cloth. the cloth becomes positively charged. which statements are true?
Answers
The silver coin gained electrons.
The wool cloth lost electrons.
How does the transfer of electrons take place?
It is a given that woolen material becomes positively charged when a silver coin is rubbed against it. Since electrons are negatively charged particles, when a piece of clothing becomes positively charged, it has lost electrons.
However, because static electricity is created during rubbing, and if one substance becomes positively charged, the other will become negatively charged, a silver coin will absorb this negatively charged electron from the wool fabric and thus become negatively charged.
As a result, both choices B and C are accurate.
I understand the question you are looking for is this:
A silver coin rubs vigorously against a wool cloth. The cloth becomes positively charged. Which statements are true?
The silver coin lost electrons.The silver coin gained electrons.The wool cloth lost electrons.The wool cloth gained protons.The wool cloth lost protons.Learn more about transfer of charge here:
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URGENT PLEASEEEEEEE which location most likely contains the youngest fossils?
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Since it contains a sedimentary rock layer, the location that most likely contains the youngest fossils is location A.
The correct option is A.
What are fossils?The preserved remains of plants and animals that were submerged in sediments like sand and mud beneath ancient seas, lakes, and rivers are known as fossils.
The sediment layers stack up on top of one another to form a physical timeline. The deepest layers contain both the oldest species and those that were petrified during their formation. The topmost layers are the newest.
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Which lists three living units of the human body in order from the simplest to the most complex level of organization?a. red blood cell → circulatory system → blood nervous system → b. nerves → brain red blood cell → heart tissue → c. circulatory system bone tissue → skeletal system → bone
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Atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism are the major levels of organisation in the body, going from the simplest to the most complex.
Cell, tissue, organ, organ system, and lastly organism are the levels of complexity from simpler to more complex. Chemical, cellular, tissue, organ, organ system, and organism levels are the six general levels of the organisation, listed from smallest to largest. A human body is structurally organised on many different levels, including atoms, cells, tissues, organs, and organ systems. The chemical level, which consists of minuscule building blocks like atoms, is the most basic level. The lowest functioning units of life are cells. Groups of comparable cells with a common purpose make up tissues.
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Which lists three living units of the human body in order from the simplest to the most complex level of organization?
a. red blood cell -> circulatory system -> blood nervous system.
b. nerves -> brain red blood cell -> heart tissue.
c. circulatory system->bone tissue ->skeletal system -> bone.
NO LINKS AND NO FAKE ANSWERS. Rather than push a heavy box from one room to another, a worker chooses to place the box on a wheeled cart. In terms of friction, explain why moving the box on the wheeled cart is easier than pushing.
Answers
Answer:
The reason why that pushing something on a cart is easier than pushing it around without a cart is very simple actually. Pushing something on a cart is much easier because there is a much smaller act of friction. This results in a smaller strain on the body.
Explanation:
There isn't really a need for an explanation because it's that simple. I don't blame you for not knowing it though. People don't know everything.
What is light? Please respond in 1-2 complete sentences using your best grammar.
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Answer:
In mine own answer, I think light is a source people use to see in the dark or for other reasons it's like something we need in life. Without light how would we live? Where does light come from? I feel like people ask this most of the time. How do we know what light is? All we probably know is that it's a source of light coming from some sort of powerful energy. So basically, light is a type of electromagnetic radiation that allows people to see more clearly in the dark.
Explanation:
Hope this helps!
A 25-gram sample of halite was placed in a jar with five other mineral samples and water. The jar was shaken vigorously for 5 minutes. The halite sample was then found to have a mass of 15 grams. What was the rate of weathering of the halite sample?
Answers
Answer:2.0 g/min
Explanation:
PLEASE HELP ME
I WILL GIVE YOU BRAINLIEST
Answers
Answer:
Transcription starts with DNA and ends with RNA the location is at the nucleus
Translation starts with the RNA and ends with Protein the location is at the cytoplasm
number of strands in a DNA is 2 strands it has Adenine, thymine, cytosine and guanine are the four nucleotides found in DNA.
number of strands in a RNA is a single strand it has adenine, cytosine, uracil, and guanine found in the RNA
The unstable isotope nickel 59 can be used to date rocks that contain nickel 59 decays into the more stable cobalt 59 the nickel isotope has a half-life of 76,000 years which statement about nickel 59 is true?
A. After 76,000 years all the nickel 59 in a rock decays in the cobalt 59
B. Nickel 59 can only be used to date rockstar younger than 76,000 years
C. All the nickel 59 stabilizes after he completes 1/2 life. Of 76,000 years
D. The amounts of nickel 59 and cobalt 59 remain the same over a half life period
E. The amounts of nickel 59 in cobalt 59 tell how long ago the rock cool to closure temperature
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Answer: C.
Explanation:
The amounts of nickel 59 and cobalt 59 remain the same over a half life period. So, the correct option is (D).
What is Half-life?The half-life of an isotope is described as the period in which half of the amount of the isotope has decayed and half of its original amount is present. Half-life is defined as the time required for a quantity to reduce to half of its initial value.
It is used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable atoms live. This is usually the case to characterize any type of exponential decay.
\(t_1_/_2= 0.693/k\)
Where, \(t_1_/_2\)= half life of the isotope
k = Decay constant
Nickel-59 has a half-life of 76,000 years, meaning that the time it takes for the isotope's original mass to decrease to half of its original volume is 76,000 years which means that amount of nickel-59 left to be decayed is equal to the amount of nickel-59 decayed into cobalt-59.
Thus, the amounts of nickel 59 and cobalt 59 remain the same over a half life period. So, the correct option is (D).
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a cyclops that is homozygous dominant for the barbed gene and is resistant to pesticides is crossed with one that is resistant but not barbed. What proportion of the off spring will be barbed and resistant.
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All of the offspring (100%) will be barbed and pesticide-resistant. Most often, bacterial defense mechanisms play a role in the development of pesticide resistance.
An experiment in genetics known as a "dihybrid cross" tracks the phenotypes of two genes by mating individuals who have multiple alleles at those gene loci. In most sexually reproducing organisms, each gene is present in two copies, allowing for the presence of two distinct alleles.
Monohybrid crosses are crosses in which there is just one pair of opposing characters. Dihybrid crosses are crosses in which there are only two pairs of opposing characteristics. For figuring out which genes are dominant, employ a monohybrid cross.
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100% of the progeny will be barbed and resistant to pesticides. Most frequently, the development of pesticide resistance is influenced by bacterial defence mechanisms.
A genetic experiment called a "dihybrid cross" studies the effects of two genes by mating individuals with different alleles at the same gene locus. Each gene is often found in two copies in sexually reproducing organisms, allowing for the existence of two different alleles.
Monohybrid crosses are crosses with only one set of antagonistic traits. Crosses with just two opposing pairings of traits are known as dihybrid crosses. Use a monohybrid cross to identify the dominant genes in a population.
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Point mutations always cause changes in the amino acid sequence.
A. True
B. False
Answers
Answer: B
Explanation:
Hi, The answer is B. This is because sometimes, when a nucleotide changes into another, if it is the third nucleotide of the amino acid code, it may not affect the amino acid. This is called the wobble rule.
Answer:
B. False
Explanation:
No, point mutations not always causes changes in the amino acid sequence.
discuss few important aspects about Decision Support System needed in this 21st century.
Provide and explain an example of Decision Support System.
For example, https://www.microstrategy.com/en
Answers
Decision Support System (DSS) is an interactive computer-based system that helps businesses and organizations make better decisions by providing actionable information, analysis, and insights. This system uses data analysis techniques, data mining, and simulation to support decision-making in complex situations.
There are several aspects of a Decision Support System that are important in the 21st century, some of them include:Data Integration: One of the most important aspects of DSS is its ability to integrate data from multiple sources, which helps to improve the quality of decision-making. This is crucial in the current era, where data is generated from various sources in huge quantities.Analytical Capabilities: DSS is equipped with analytical capabilities that help users to perform complex data analysis, including data mining, regression analysis, and simulation modeling. These analytical capabilities are critical in making sense of the large volumes of data generated by modern businesses.User-Friendly Interface: Another important aspect of DSS is its user-friendly interface that enables users to interact with the system easily and efficiently.
This aspect is important in the 21st century, where users expect to interact with technology in a simple and intuitive way.Collaboration Capabilities: DSS provides a platform for collaboration and knowledge sharing among users, which is crucial in complex decision-making processes.Example of Decision Support System:The MicroStrategy platform is an example of a Decision Support System. It is a comprehensive business intelligence platform that provides organizations with a range of analytical capabilities, including data mining, predictive analytics, and dashboarding. MicroStrategy enables users to integrate data from multiple sources, perform complex data analysis, and share insights with other users. It also provides a user-friendly interface that makes it easy for users to interact with the system.
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Jasmine went to the tide pool. She took pictures of some animals. How can you tell which tide zone the animals live in?
Answers
Answer:
food and population
Explanation:
Different animals eat different things for example a sea urchin eats seaweed so if she took a picture of a urchin you would find it in the one that has the most vegetation. the urchins try to space out so look how many animals are in the picture. I hope that helps ;)
Answer:
food and population :)
Explanation:
please give brainliest?! :):):)
Which sectors of human life were profoundly impacted by the emerging international trading system? (check all that apply.)
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The emerging international trading system has deeply affected all sectors of human life. The following are some of the sectors of human life that were profoundly impacted by the emerging international trading system: Agriculture Sector: The international trade system has dramatically influenced the agricultural sector.
The primary export product is agricultural commodities such as coffee, cocoa, tea, and tobacco. International trade has also facilitated the exchange of technology and information, resulting in increased crop yields. Industrial Sector: The industrial sector has benefited from the international trade system. Countries that focus on the production of high-value goods have been able to take advantage of new markets. Industrialized nations are often the recipients of low-cost goods, such as textiles and electronics, from developing nations. Service Sector: The international trade system has impacted the service sector. The service sector has gained from trade in financial and legal services The industrial sector has also benefited from low-cost goods from developing countries, including textiles and electronics. The service sector has seen significant growth in outsourcing as a result of new technologies, resulting in the development of call centers, software development, and customer support centers. The international trade system has had a substantial impact on the world's economy and improved the quality of life of people worldwide.
The emerging international trading system has had a profound impact on all sectors of human life, including agriculture, industrial, and service sectors. The impact of international trade has significantly contributed to the development of the global economy, which has improved the quality of life of people worldwide.
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Most pituitary hormones control
A. other endocrine glands.
B. the hypothalamus.
C. body cells.
D. the brain.
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Answer:
A
Explanation:
What role do lichens and moss play in primary succession?
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As generations of the lichens die, their dead remains gets decompose and are added in the soil.
In general , Primary succession is considered as the places in the community that is never occupied. Hence , Pioneer communities also help in the enrichment of the soil. When the generations of the mosses or lichens die, their dead remains gets decompose and gets added to the soil. This soil then become enriched and can support variety of plant life.
Also , the Lichens are known as the pioneer community as they are the first to colonize bare rocks, mountains, and cliffs. They also helps in corrosion of rocks and accumulation of a important minerals and organic matter.
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which of the following is true about science? group of answer choices experimental results can prove an idea without a doubt science is tentative and changes with new data science can answer any question about the world science is not useful in your everyday life
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The process of generating and testing a hypothesis forms the backbone of the scientific method. When an idea has been confirmed over many experiments, it can be called a scientific theory.
3. What is the term for the ability of a species to survive in current environmental conditions?
A.Natural Selection
B.Extinction
C. Fitness
D. Speciation
Answers
Help due soon I’ll give brainliest
Over half of the people in Cape Canaveral, Florida are
over the age of fifty. How is
this related to Florida's role in space research?
A)
The Kennedy Space Center only hires people who are over fifty years old.
B)
The Cape Canaveral communities offer free medical care for senior citizens.
Cape Canaveral has laws only allowing senior citizens to live in the
community
An entire generation of space-industry workers retired in the Space Coast
area.
D)
Answers
Answer:
B
Explanation:
What’s a claim ? I don’t know what to write for the claim . I need help please. It’s for biology class ( no links aloud )
Answers
Answer:
to state or assert that that certain thing is your property
Explanation:
Which of the following would remove the QRS complex from an ECG recording?
A. complete removal of the SA node
B. complete removal of the bundle of His
C. damage to the AV valves
D. damage to the Purkinje fibers innervating the papillary muscles only
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The option that would remove the QRS complex from an ECG recording is "B. complete removal of the bundle of His."
The QRS complex is a graphical wave seen on an electrocardiogram that reflects ventricular depolarization. It is the result of the activity of the conduction system's bundle branches, Purkinje fibers, and ventricular muscle cells. QRS complex is a term used to describe the initial downward deflection of the ECG.
Followed by a large peak, followed by an upward deflection. The Q wave represents depolarization of the interventricular septum's left side, whereas the R wave reflects depolarization of the right and left ventricles. The electrical signal travels from the bundle of His to the right and left bundle branches.
And then through the Purkinje fibers in the ventricular walls, causing them to contract, leading to the QRS complex. Therefore, removing the bundle of His will remove the QRS complex from an ECG recording. Therefore option B is correct.
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Rock, soil, sand, sediments and land make up what sphere?
Answers
Answer:
lithosphere
Explanation:
Which of the following is NOT part of the first line in immune defense? *
Mucus
Sweat
Tears
Antibodies
Skin
Answers
Answer:
Antibodies
Explanation:
Skin, tears, sweat and mucus, are all first line of defense.
The part that is not the first line of immune defense is antibodies. The correct option is d.
What are antibodies?
The immune system is a bodily system that consists of white blood cells and antibodies that aid in the fight against any external invaders or infections that enter the body.
They are the body's defense mechanism. Antibodies recognize the pathogen and assist your body in combating it. These antibodies are produced by your body's immunological system. Everyone possesses a variety of antibodies. Each of them detects intruders, such as viruses and bacteria, that might cause illness.
An antibody is a protein that the body's immune system produces when it recognizes dangerous chemicals known as antigens. Microorganisms (bacteria, fungi, parasites, and viruses) and chemicals are examples of antigens.
Therefore, the correct option is d, Antibodies.
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the most important of the secondary lymphoid organs in the body are the lymph nodes. the most important of the secondary lymphoid organs in the body are the lymph nodes. true false
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"The most important of the secondary lymphoid organs in the body are the lymph nodes" is a true statement because lymph nodes play a critical role in the body's immune response.
Lymph nodes, spleen, thymus, tonsils, and adenoids are examples of secondary lymphoid organs. The lymphatic system is made up of lymphatic organs and tissues that form the backbone of the immune system. The lymphatic system is responsible for managing body fluids, which transport nutrients and oxygen to cells and remove wastes from cells. The lymphatic system also works with the immune system to eliminate infections and illnesses from the body. Lymph nodes, which are found throughout the body, are responsible for filtering lymph, a fluid that contains infection-fighting white blood cells. If a germ is detected in the lymph fluid, it is captured by the white blood cells and carried to the lymph nodes, where it is identified and targeted for destruction. Lymph nodes aid in the body's immune response, working in tandem with the spleen and other lymphatic organs. They also produce and distribute immune cells throughout the body, allowing the body to respond quickly to new infections. As a result, the statement "The most important of the secondary lymphoid organs in the body are the lymph nodes" is true.Learn more about Lymph nodes: https://brainly.com/question/31083068
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what change occurred in each population of bacteria from the early generation to the later generation ?
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The maximal population of some bacterial species at the end of the log phase can reach a density of 10 to 30 billion cells per milliliter under ideal circumstances.
Since the very beginning of life on Earth, bacteria have existed.
There is strong evidence that bacteria have existed since the early Precambrian Period, or roughly 3.5 billion years ago, as evidenced by the discovery of fossilized bacteria in rocks from the Devonian Period (419.2 million to 358.9 million years ago).
At least since the Paleoproterozoic period, which lasted for around 1.8 billion years, when oxygen was produced by cyanobacteria and entered the atmosphere, bacteria have been present in large numbers on Earth.
As a result, bacteria have had plenty of time to evolve into a variety of offspring forms and adapt to their environs.
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[Step 1]: Determine from the data (Table 1) whether IGF2 is maternally or paternally imprinted (silenced).
A. Maternal B. Paternal
[Step 2]: In Cross Number 4, what is the expected number of heterozygous (IGF2/Δigf2 ) progeny?
A. 0 B. 12. 5 C. 25 D. 37. 5 E. 50
[Step 3]: To show that the functional allele is reversibly switched by the passage through the germline of the opposite sex, DeChiara et al. Also made intercrosses between heterozygous F1 females and heterozygous F1 males. Based on your determination of how the IGF2 gene is imprinted, determine the expected phenotypic ratio of the progeny from these crosses (Normal : Growth deficient).
A. All Normal B. 3:1 C. 1:1 D. 1:3 E. 1:2:1 F. All dwarf
Answers
Step 1: IGF2 is (B) Paternal; Step 2: The expected number of heterozygous (IGF2/Δigf2 ) progeny is (E) 50; Step 3: The expected phenotypic ratio of the progeny from these crosses (Normal : Growth deficient) is (C) 1:1.
Step 1: We must examine the information in Table 1 to establish whether IGF2 is maternally or paternally imprinted (silenced).
We can see from the table that IGF2 expression is only seen when it is inherited from the paternal allele and not from the maternal allele. This indicates that the gene is paternally imprinted, which means that it is silenced when passed down from the mother.
Therefore, the correct option is: B. Paternal.
Step 2: In Cross Number 4, a homozygous IGF2/IGF2 male is crossed with a heterozygous IGF2/Δigf2 female. This means that all children will either inherit the IGF2 or Δigf2 allele from their mother or the IGF2 allele from their father.
A Punnett square can be used to determine the number of heterozygous (IGF2/Δigf2) progeny. The genotypes of the progeny (as obtained from the Punnett square) are: Δigf2, Δigf2, IGF2/Δigf2, IGF2.
Therefore, option (E) 50 is correct since it can be observed that half of the progeny so obtained are heterozygous (IGF2/Δigf2).
Step 3: The progeny of these crossings are predicted to have the following phenotypic ratio:-
If the father is the source of the functional allele: All of the progeny are normal (due to the father's functioning IGF2 allele).If the mother is the source of the functional allele: All of the progeny are growth-deficient (due to the mother's IGF2 allele being silenced).Therefore, a functional allele has a 50% chance of being inherited from the father and a 50% chance of being inherited from the mother. In light of this, the expected phenotypic ratio is (C) 1:1.
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If these examples are density independent or dependent limiting factor
Answers
In ecology, density is a measure that refers to how many individuals a population has in a specific habitat.
Considering this, we can say that water is a density-dependent limiting factor, since this is a limited resource that can vary its availability annually, but also is a species have too many individuals, all of them will not have the same capacity to reach this resource, especially when we talk about large animals or plants.
Diseases caused by bacteria would be also a density-dependent limiting factor, since only when too many microorganisms of a pathogenic species replicate in our bodies, do we begin to feel the symptoms of that illness.
Predators are also a density-dependent limiting factor since the species which they feed on can be overhunted by them, being reduced in number of individuals, or being not too much hunted and increase their individuals.
Earthquakes are a density-independent limiting factor, since they do not depend on other factors to occur, but only on the movement of our planet's plates.
Finally, limits population regardless of how many organisms are present in the area is a density-independent limiting factor, since they do not depend on how many organisms they're to limit the increase of the population. Being this option an abiotic kind of non-limiting factor.
During meiosis I, ____________ chromosomes line up side by side and may shuffle genetic material between themselves.
Answers
During meiosis I, homologous chromosomes line up side by side and may shuffle genetic material between themselves.
What is Meiosis?In sexually reproducing organisms, meiosis is a unique type of cell division of germ cells that results in the production of gametes, such as sperm or egg cells. Two rounds of division are necessary, and the end product is four cells with just one copy of each chromosome.Prophase I, Metaphase I, Anaphase I, and Telophase I are the four phases that make up Meiosis I.It deactivates the sporophytic information while activating the genetic information for the production of sex cells. By halving the same, it keeps the chromosomal count constant.What is chromosome?A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's genetic code. Histones, which serve as packing proteins for the majority of eukaryotic chromosomes, work with chaperone proteins to attach to and condense the DNA molecule in order to preserve the integrity of the molecule.Learn more about Meiosis here:
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what particle allows an atom to create new substances
Answers
Answer:
An atom makes up everything in the universe
Explanation:
The opposite processes of evaporation is.
A. condensation.
B. percolation.
C. transpiration.
Answers
Answer:
condensation
Explanation:
Answer:
A. condensation
Explanation:
Evaporation is the process of liquid turning into gas, the opposite would be condensation which is the process of water vapor turning back into a liquid.