Answer:
D and E
Explanation:
The others are physical methods and can be separated again.
Hope this helps :)
Ashes (which are made of carbon), carbon dioxide gas, water vapor, heat, and light are produced when wood is burned. Since this change cannot be undone, it is a chemical change. Since oxygen and hydrogen unite to create a single product, Thus option D and E is correct.
What is chemical changes?A chemical change is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these.
It happens when two compounds mixes to create a new material (synthesis or either decomposes to form more substances).
Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance.
These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.
Therefore, burning of wooden logs and formation of water is an example of chemical changes.
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PLEASR HELP- 24 points!
What front brings the most severe weather?
-Cold Front
-Warm Front
-Stationary Front
Answer:
cold fonts
Explanation:
hope this helps
Explain the relationship between a hypothesis and a theory. Then give an example of something that would cause a hypothesis or a theory to be revised or discarded.
Answer:
Hypothesis is a written observation, that has not been proven correct, but is written after observation of a specimen. Proving this particular hypothesis, shows the interconnectivity/ relationship between a hypothesis and a theory.
Explanation:
Simply put, a hypothesis is a written observation, which may or may not be true, while a theory is established when a hypothesis is proven correct.
AN EXAMPLE OF SOMETHING THAT COULD MAKE A THEORY TO BE REVISED:
If other laws or theories put before it controversies it.If its observations where not correctly written.If it cannot stand the test of time.If further experiments doesn't show the same result.Hypothesis is either written or evidence based observation but it has to be proven where as when a hypothesis is proved by doing experiments multiple times and getting same results then it is called as as scientific theory.
What is scientific theory ?scientific theory can be a structured form where a group of facts can meet and be explained by using scientific hypothesis and laws, each theory can be proved by doing experiments and applying scientific method.
Scientist will design an experiment and conduct the experiment to test and prove that hypothesis; If the result of hypothesis is incorrect, then new hypothesis will be set and new experiment will begin.
If the result of hypothesis is correct, repeated tests have been done to ensure the accuracy of the result.
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A mineral forms in water heated by magma inside Earth. Which statement best describes this mineral? The mineral formed through evaporation. The mineral crystallized from molten material. The mineral formed when a hot water solution cooled. The mineral likely has all the same properties as the surrounding rock.
Answer:
The mineral formed when a hot water solution cooled.
Explanation:
The mineral is formed from hot water solution heated by magma in the Earth when the water is cooled because when hot water solution is heated by magma in the Earth, it begin to cool underground, then the elements and compounds present there move out of the water solution , after these, these elements and compounds then undergo crystallisation and form minerals . Pure metals that crysralise from hot water solution is called Veins.
A mineral forms in water heated by magma inside Earth, when the hot water solution cooled.
Minerals formed from heated water by magmaA mineral is formed from hot water solution heated by magma in the Earth when the water is cooled.
When hot water solution is heated by magma in the Earth, afterwards it begins to cool underground, then the elements and compounds present in the solution move out of the water solution.
After this process, the separarted elements and compounds undergo crystallisation and form minerals. The minerals formed in this process are called veins.
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Which molecules prevent cell membranes from dissolving in water?
O A. Nonpolar fatty acids
O B. Polar phosphate groups
C. Adenosine triphosphates
D. Large globular proteins
Explanation:
a nonpolar fatty acids
hope this help u
A non-polar fatty acids prevent cell membrane from dissolving in water. The correct option is A.
What is a cell membrane made of?The cell membrane, also known as the plasma membrane, is uncovered in all cells and serves to separate the cell's interior from the outside environment.
The cell membrane is made up of a semipermeable lipid bilayer. The cell membrane controls the transport of materials into and out of the cell.
These are glycerophospholipids, which are molecules made up of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon compound that serves as the membrane lipids' backbone.
As, these non-polar fatty acids are insoluble in water, so it protect the cell membrane from water. It actually prevent the cell membrane to get dissolve in the water.
Thus, the correct option is A.
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Biologyyyy agaaainn!
Answer:
1 and 2
Explanation:
This is my answer to your question
Mr. Chavez wants his class to prepare a procedure that would demonstrate cellular diffusion. Which of the following procedures would best demonstrate cellular osmosis?
A. A procedure that uses the skins of potato left overnight in oil
B. A procedure that uses a cluster of grapes left overnight in a high concentration of salt water
C. A procedure that uses a 2-liter bottle filled with oil and water and left overnight
D.A procedure that uses a banana that has been left overnight in milk
Answer:
B
Explanation:
The second option correctly shows the process of cellular osmosis.
When the grapes would be immersed in water, the molecules of water move across the cell membrane from the region of low to high solute concentration. Due to this, the water would leave the cells and diffusion of water from the cells of the grapes. Thus, option B is the correct answer.
In conclusion, the procedure that uses a cluster of grapes left overnight in a high concentration of salt water would BEST demonstrate cellular osmosis (Option B).
Osmosis refers to the movement of a solution (often water) across a selectively permeable membrane.This movement (osmosis) is due to the difference in solute concentrations on both sides of the semipermeable membrane.In osmosis, water molecules move from a region of low concentration of solutes (e.g., salt) to a region of high concentration of solutes.
In conclusion, the procedure that uses a cluster of grapes left overnight in a high concentration of salt water would BEST demonstrate cellular osmosis (Option B).
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is this true or false, Surface waves result from a combination of up-and-down plus side-to-side motion.
Answer:
yaaa you knew that air is everywhere it moves
All the services that people use
and receive when they are away
from home are known as
A transportation.
B hospitality
C tourism.
D travel.
All the services that people use and receive when they are away from home are known as - option B. hospitality.
Hospitality is a term associated with the providing best care and services to their guests and anticipating their needs. The service includes various acts such as welcoming, receiving, hosting, or entertaining guests.
The key components of hospitality are:
ConsiderationHumilityThoughtfulGratefulEmpathyPoisedIn hospitality guest or traveler who is away from home receives and use, services are given by their host.
Thus, the correct answer is - B. hospitality.
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What happens What happens during cytokinesis? /ring cytokinesis?
What is deoxyribose?
A. n acid found in DNA
B. a sugar in DNA
C. a pigment found in RNA
D. a nitrogenous base found in DNA and RNA
A researcher, studying dolphins in the wild, made the following sketch. Each dot on the map represents one dolphin. The area surveyed by the scientist was 1 km2. Based on the researcher’s data, how many dolphins would you estimate to be in a 3 km2 area?
A. 3
B. 7
C. 14
D. 21
Autotrophs are called_________because they produce all the food that________use
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+).
Thus, H2CO3 = HCO3- + H+
If the pH of the blood increases, one would expect:
(A) a decrease in the concentration of HCO3- and an increase in the concentration of H+
(B) an increase in the concentration of H2CO3 and a decrease in the concentration of HCO3-
(C) a decrease in the concentration of H2CO3 and an increase in the concentration of HCO3-
(D) an increase in the concentration of HCO3- and a decrease in the concentration of OH-
(E) a decrease in the concentration of HCO3- and an increase in the concentration of both H2CO3 and H+.
I'm not sure if it is C or D
Answer:
The answer is "Option C".
Explanation:
In the given question, the pH scale is used to evaluate acid or basic (alkalinity) formulas. It is nearly positive throughout the blood. Human blood has to maintain its pH at about 7.4, to prevent dramatically increased or lower changes, even though the bloodstream enters or exits acidic or essential substances.
The buffers are essential for stabilization management. Calcium carbonate produced as carbon dioxide joins the blood system and combines with the liquid is a buffer which adds to the pH level in the human blood. It is returned to the water and distributed as a waste product until it enters the lungs, that's why choice C is correct.PLZ PLZ HELLPP MEEE will mark brainliest
Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a. acidification of the water
b. algae growth as a result of eutrophication
c. degraded quality of water for human and livestock consumption
d. improved water habitats for human recreation
Answer:
Answer D
Explanation:
improved water habitats for human recreation
____ is i five carbon sugar found in dna
Answer:
deoxyribose
Explanation:
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose.
Which example illustrates adhesion?
O water droplets sticking to a window
O water forming a large drop
O water evaporating from a leaf
O water falling from the sky
Answer:
The answer is Water droplets sticking to a window.
Which statement best summarizes the complete rock cycle?
1.Sedimentary rocks are weathered to form igneous rocks. Igneous rocks are melted and cooled to form metamorphic rocks.
2.Metamorphic rocks melt to form igneous rocks. Igneous rocks can be weathered to form sedimentary rocks.
3.Sedimentary rocks are the only rocks that are weathered. Igneous rocks can change to sedimentary rocks.metamorphic rocks by heat and pressure. All rocks can be melted and cooled to form igneous rocks.
4.All rocks can change into all other rocks. When rock is melted and cooled, it forms an igneous rock. When rock is under extreme heat and pressure, a metamorphic rock forms. When rock goes through stratification, a sedimentary rock is formed.
Answer:
3.Sedimentary rocks are the only rocks that are weathered. Igneous rocks can change to sedimentary rocks.metamorphic rocks by heat and pressure. All rocks can be melted and cooled to form igneous rocks.
Explanation:
Sedimentary rocks as the name implies are made up of rock sediments which are formed by weathering processes.
Igneous rocks are the rocks which gives rise to sedimentary rocks and metamorphic rocks under certain conditions such as heat and pressure.
All the type of rocks can also be melted and cooled to form back to igneous rocks.
3 These diagrams show where seeds from two different
plants were found
A. Which plant uses the wind to spread its seeds?
B. Which plant's seeds are most likely to be spread
by animals? .....
Answer:
A: plant A
B: plant B
hope it helps you
What are the main factors in ecosystem diversity?
The main factors in ecosystem diversity include the physical characteristics of the environment and the diversity of species present.
What is Diversity?This involves the environment containing different types of species and is affected by certain factors.
The factors which affect ecosystem diversity include physical characteristics of the environment and the diversity of species present.
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What r the 4 seasonal stages of the year ?
Answer:
Spring, Summer, Winter, and Fall
Explanation:
Please mark me brainliest]
Answer:
Spring, Summer, Autumn (Fall) and Winter.
Explanation:
What is the term for an organism that makes its own source of chemical energy?
protist
B chloroplast
decomposer
D producer
Answer:
D thxs good luck on your test
Explanation:
Name and describe the five types of active transport systems.
Answer:
Please Mark as Brainliest. Please!!!!!!!!!!
Explanation:
Definition
Active transport is the process of transferring substances into, out of, and between cells, using energy. In some cases, the movement of substances can be accomplished by passive transport, which uses no energy. However, the cell often needs to transport materials against their concentration gradient. In these cases, active transport is required.
Active transport requires energy to move substances from a low concentration of that substance to a high concentration of that substance, in contrast with the process of osmosis. Active transport is most commonly accomplished by a transport protein that undergoes a change in shape when it binds with the cell’s “fuel,” a molecule called adenosine triphosphate (ATP).
For example, one type of active transport channel in the cell membrane will bind to the molecule it is supposed to transport – such as a sodium ion – and hold onto it until a molecule of ATP comes along and binds to the protein. The energy stored in ATP then allows the channel to change shape, spitting the sodium ion out on the opposite side of the cell membrane. This type of active transport directly uses ATP and is called “primary” active transport.
Another type of active transport is “secondary” active transport. In this type of active transport, the protein pump does not use ATP itself, but the cell must utilize ATP in order to keep it functioning. This will be explained in more depth in the section on Symport Pumps below.
Lastly, active transport can be accomplished through processes called endocytosis and exocytosis. In exocytosis, a cell moves something outside of itself in large quantities by wrapping it in a membrane called a vesicle and “spitting out” the vesicle. In endocytosis, a cell “eats” something by wrapping and re-forming its membrane around the substance or item.
Each type of active transport is explained in more detail below.
Types of Active Transport
Antiport Pumps
Antiport pumps as an example of active transport
Active transport by antiport pumps
Antiport pumps are a type of transmembrane co-transporter protein. They pump one substance in one direction, while transporting another substance in the opposite direction. These pumps are extremely efficient because many of them can use one ATP molecule to fuel these two different tasks.
One important type of antiport pump is the sodium-potassium pump, which is discussed in more detail under “Examples of Active Transport.”
Symport Pumps
Symport pumps take advantage of diffusion gradients to move substances. Diffusion gradients are differences in concentration that cause substances to naturally move from areas of high to low concentration.
In the case of a symport pump, a substance that “wants” to move from an area of high concentration to low concentration down its concentration gradient is used to “carry” another substance against its concentration gradient.
One example of a symport pump – that of the sodium-glucose transport protein – is discussed below under “Examples of Active Transport.”
Sympoter pump as an example of active transport
Active transport by symporter pumps
Endocytosis
In the third type of active transport, large items, or large amounts of extracellular fluid, may be taken into a cell through the process of endocytosis.
HWLPPPPPPPAHWOWAJAOAKSNSKWKEKEOEL
Answer:
glycolose
Explanation:
what would happen if all countries in the world depended only on wind power?
Answer:
A country getting all its electricity from a combination of wind, solar ... Not only does that make vitamin D a commodity, it also means solar ... Elon Musk became a sensation in South Australia last year after he decided Tesla would build the world's biggest lithium-ion battery ... This didn't happen overnight.
Fastttttttttttttttttttttttttttt I will give branliest
Answer:
ok
Explanation:
Answer:
A. Both of them are correct
Explanation:
Mechanical waves include the movement of water, from ripples in a puddle to giant rolling waves on the surface of the open ocean. For example, water waves (mechanical waves) can transfer energy across an entire ocean basin, even though individual water molecules do not travel great distances.
Electromagnetic propagation through water is very different from propagation through the air because of water's high permittivity and electrical conductivity. Plane-wave attenuation is high compared to air and increases rapidly with frequency.
Glucose can be classified as both of the following terms
Answer:
hope this helps :)
Explanation:
Monosaccharides contain a single unit; disaccharides contain two sugar units; and polysaccharides contain many sugar units as in polymers - most contain glucose as the monosaccharide unit. Number of Carbons: Monosaccharides can be further classified by the number of carbons present.
What's the difference between inference and observation? Give examples of each.
Answer:
A inference is a conclusion reached on the basis of evidence and reasoning.
A observation is an act or instance of regarding attentively or watching
Explanation:
Example for a inference would be - lets say you notice someone isnt acting like theirself you may infer that their not having a good day or their not in a mood
Observation example- when your doing a lab for science you may observe the different types of utensils or the effects of the object you use like oh this is blue or something
today's midterms and I just want to say good luck to you all. (we're doomed)
Answer:
lol, good luck dude ur gonna need it.
what is one common example of a double replacement reaction??????
help me pleaseeeeeeee
Answer:
The S stage (DNA sythesis)
Explanation:
During the S stage the cell synthesisis a new copy of DNA in the nucleus in preparation for cell devision.