What question can you ask yourself if you are trying to determine if a change is a physical or chemical change?

Answers

Answer 1
So, in summary, there are really only two criteria for whether a change is chemical or physical: 1) After the change does it look the same and 2) can you change it back? If the answer is yes, the change is physical every time .
Answer 2

Answer:

you can ask after the change:

1. Does it look the same

2. Can it be changed back

if the answer is yes then the change is always going to be physical

Explanation:

pls mark branliest


Related Questions

Which factor has the GREATEST impact on the vertical movement of deep ocean currents? *​

Answers

The simplified drawing shows how changes in polar vortex winds high in the stratosphere can influence the North Atlantic to cause changes in the global "conveyor belt" of ocean circulation.

The image below shows a close-up of the crystals formed in a pegmatitic rock. Which characteristic provides the best evidence that is rock solidified deep underground?

low density

light color

very coarse texture

Answers

Answer:

Option C (very coarse texture) is the appropriate one.

Explanation:

Everything always cools quickly because once magma reinforces above that of the ocean floor and perhaps the shape it possesses seems to be agricultural context, color temperature, and so on. But as magma settles down underneath the layer, it gets sufficiently opportunity to solidify, culminating in a much more gritty texture as well as color change, respectively. We then assume that perhaps the assumption of whether concrete solidified buried underground correlates to a rather coarse framework.

Other decisions aren't linked to the circumstance issued. So the one above is indeed the best one.

Which of the following questions can be answered scientifically?


a

Should we just let the river flow where it wants?


b

What can be done to stop erosion?


c

Is erosion control worth the financial costs?


d

Can planting cover crops reduce erosion?

Answers

Answer:

d

Explanation:

Does the plant use all wavelengths of light to carry out photosynthesis? Why does this make plants look green?

Answers

Answer:

Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects. ... All photosynthetic organisms have chlorophyll a which absorbs violet-blue and reddish orange-red wavelengths. Chlorophyll a reflects green and yellow-green wavelengths. Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light. That particular light wavelength is reflected from the plant, so it appears green. Plants that use photosynthesis to make their own food are called autotrophs.

Explanation:     Hope it helps :)

Write a news story of road accident​

Answers

Answer:

15 Killed, 28 Injured in a Bus accident

The bus was going to Nagpur in that the another bus came and crash to the another bus. In this accident 15 people were Killed and 28 peoples are injured.

According to police the people in the Bus, was the people's of a Nagpur. in this accident the police has Declared that there is no mistake of Driver in this accident.

The transport minister of Maharashtra Diwakar Raote Introduced that government will give 2 lakhs rupees to injured family. and 3 lakhs to dead families.

Help plz asappppppppp

Answers

Answer:

A. Whales evolved from four-legged animals.

Explanation:

I'm 100% on this one, because on Plato we were learning about evolution, and one of the slides said that whale had evolved from four legged animals.

Hope this helps ya!!!

Got a screenshot for proof!

A is correct answer

What is the correct answer?

Answers

Answer:

Friction

Explanation:

There u go

Identify the type of mutation that occurred and explain in what way it affected the protein

Answers

Answer:

The type of mutation that occurs when in the DNA strand there is a change from guanine to cytosine is a nonsense mutation, since the triplet that should encode the amino acid encodes a stop codon and the protein cannot be completely synthesized.

Explanation:

The nonsense mutation consists of a change in one of the bases of the stranded DNA, which is transcribed into an altered mRNA, producing a stop codon, instead of an amino acid.

In the table it is observed that the CCA codon is a stop codon that cuts off the protein synthesis prematurely, leaving it incomplete and probably non-functional.

Sometimes this type of mutation can alter the sequence of amino acids but the protein may be complete enough to partially fulfill its function.

Viruses exist on a microscopic scale

True
False

Answers

Answer:

True

Taking a look at viruses under the microscope. Unlike other unicellular organisms like bacteria, viruses are commonly referred to as particles rather than cells.

True! viruses can only be seen in DNA and a microscopic scale

Oily vegetable or animal substances are _ (choose only one answer)
Vitamins
Proteins
Lipids
Carbohydrates

Answers

Oily vegetables ir animal substance are lipids

The _________ and the ________ river are the headwaters (origin) of the cape fear river

Answers

Answer:

google said deep and haw rivers

What are some characteristics that green algae and kelp share?

Answers

Answer:

Green algae contain the same carotenoids and chlorophyll a and b as land plants, whereas other algae have different accessory pigments and types of chlorophyll molecules in addition to chlorophyll a. Both green algae and land plants also store carbohydrates as starch.

A scientist thinks he has discovered a drug that interferes with the functioning of a virus in the human body. To effectively block infection, the drug can

Answers

The correct options for the question are as follows:

weaken viral respiration.

destroy viral mitochondria.

reduce the ability of the virus to absorb cells.

prevent the virus from entering cells.

Answer:

The correct answer is - prevent viruses from entering the cell.

Explanation:

If a DNA strand has 32 % guanine, what percent thymine does it contain?
A) 36%
B)18%
C)64%
D)32%

Answers

Answer:

B

Explanation:

Guanine and Cytosine pair together. So, if 32 percent is guanine, then 32 percent should also be cytosine. This is a total of 64 percent. The remaining 36 percent is split between thymine and adenine. So, Thymine will have half of 36 percent which is 18 percent.

Why would you be unable to run forever without your muscles giving
out?

Answers

Well The body converts glucose to energy which produces lactic acid as a by-product. As that builds up in the muscles, it begins causing cramps and fatigue as a signal to stop. So you have to stop when you reach the lactate threshold. And Over the course of a sustained run at half-marathon pace or faster, the amount of energy (and thus oxygen) needed to maintain that pace gradually inches upward. Over the course of 10-20 minutes, your oxygen consumption can drift upward by as much as 25 per cent, making it progressively harder for you to Hold up.

I Hope this Helps! May I Have brainliest? <3

I would  be unable to run forever without my muscles giving out is as a result

of stress , shortage of glucose and build-up of lactic acid.

When activities are performed by muscle tissues , the glucose is usually

converted to energy with the release of lactic acid.

The shortage of glucose and build up of lactic acid brings about fatigue and

wearing out of the tissues thereby making us unable to run forever.

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which three elements make up most of the human body
A. Ba, N, Sn
B. B,C, Ne
C. C, H, O
D. Au, Ag, C

Answers

Answer:

C. C, H, O

Explanation:

The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

Answer:

c. c,h,o

Explanation:

make up the human body

In dr. Hill's research, he discovers that 3 children in his study that have maple syrup urine disease (MSUD), a recessive genetic disorder that prevents that body from processing certain amino acids. Since MSUD occurs in only around 1 in 185,000 infants worldwide, 3 cases in a population of 1000 is usually high. Dr. Hill has two hypotheses to explain this. The first has to do with the original settlers. Name the process he has in mind

Answers

Answer:

i think its a

Explanation:

Give two uses of energy transferred by respiration in eukaryotes

Answers

Answer:

Most aerobic respiration takes place inside mitochondria. Some of the energy released in respiration is used to make larger molecules from smaller ones, to enable muscles to contract and to keep temperature steady. Some of the energy released in respiration in plants is used to make amino acids and proteins.

Explanation:google said it and i had this question in my science class and got it right

The uses of energy are - energy for metabolic reaction and growth and development of cells.

Cellular respiration provides energy with the series of complex chemical reaction cycles that is used for:

Working your muscles - for movement and physical activities energy is required.Growth and repair of cells - dividing cells, repairing them and development of the cells also require energy.Building larger molecules from smaller ones for instance proteins from amino acids.Allowing chemical reactions to take place.Absorbing molecules in active transport.

Thus, The uses of energy are - energy for metabolic reaction and growth and development of cells.

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.when you increase the speed of an object, the kinetic energy

O increases by the same factor
O increases by the square of the factor

Answers

Answer:

increase by the same factoe

Answer:
Increase by the same factor
Explanation:

It turns out that an object's kinetic energy increases as the square of its speed. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph. Thus a modest increase in speed can cause a large increase in kinetic energy.

Which best describes an example of conduction? a heater warming a room water boiling in a pot on a stove an ice cube melting in a cup of hot chocolate cold water moving toward the bottom of a swimming pool

Answers

Answer:

boiling in a pot on a stove

Explanation:

Conduction is one of the methods of heat transfer (the other two being convection and radiation). Conduction is the direct transfer of heat through a solid medium. The heat causes the molecules of the objects, which are in direct contact with one another to vibrate, hence, passing the heat.

Based on the above description of conduction, the example that best fits this is BOILING IN A POT ON A STOVE. This is because the pot is in contact with the stove, which is the source of the heat. Hence, heat is transferred from the stove to the pot.

Which of the following statements about the nucleus is NOT true?
A.The nucleus stores the coded instructions for making the cell's proteins.
B. The nucleus usually contains a nucleolus region which is where ribosome assembly begins.
C. The nucleus is the site of protein assembly.
D. The nucleus is surrounded by a nuclear envelope that lets materials in and out.

Answers

Answer:

C

Explanation:

Ribosomes are where protiens assemble:)

Answer: C.

Explanation: Cytoplasm is not the component of the nucleus but the nucleus is found in the cytoplasm. The four components of the nucleus are nucleoplasm, nuclear envelope, nucleolus, and chromosomes.

Which term best describes a person's state of well-being? a Disease-free b Component c Literacy .d Health​

Answers

Answer:

Health

Explanation:

Because you are well when you are in good health.

Which term applies to muscle cell

A) prokaryotic
B) eukaryotic
C) unicellular organisms
D) stem cell

Answers

Stem cell!!!!!!!!!!!!!!!!!

Stem cell term applies to muscle cells.

What are the functions of stem cells?

Stem cells are the cells that develop into blood, brain, bones, and all of the body's organs. They have the potential to repair, restore, replace, and regenerate cells, and could possibly be used to treat many medical conditions and diseases.

While they can regenerate themselves in an animal or person they are generally very difficult to grow and to expand in the laboratory. Because of this, it is difficult to obtain sufficient numbers of many adult stem cell types for study and clinical use.

Stem cells originate from two main sources: adult body tissues and embryos. Scientists are also working on ways to develop stem cells from other cells, using genetic “reprogramming” techniques.

Learn more about stem cells:

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remember that the action and reaction forces are equal in any collision if the action and reaction forces are equal then why do bumper cars that are of different masses react differently

Answers

Answer:

Newtons´s second  law explain that F=MA, so, the heavier the car, the higher the impact force.

Explanation:

Answer:

no

Explanation:

Describe the natural process that creates a human clone.​

Answers

Answer: Natural cloning also occurs in animal organisms during processes such as budding (offspring grows out of the body of the parent), fragmentation (the body of the parent breaks into distinct pieces, each of which can produce an offspring), and parthenogenesis. In humans and other mammals, the formation of identical twins is a type of natural cloning.

Explanation:

hope this help from tae lol

Tell me as precisely as you can when Hurricane Sandy hit Long Island.

Answers

Answer:

Millions in the tri-state area lost power during the height of Superstorm Sandy on October 29, 2012.

HELP ME PLEASE I DON'T KNOW WHAT TO DO AND THERE IS A BIRD TRYING TO GET INTO THE WINDOW WHAT DO I DO!!!!!

Answers

Answer:

EAT IT

Explanation:

YOU WOULD WANT TO CALL A MR. DWIGHT SHRUT TO HELP YOU IF YOU CAN!!

Answer:

be brave.

Explanation:

PLLZZ I NEED HELP DUE SOON!!!!
What type of molecule forms the antibodies found in the human immune system?

Answers

Answer:

An antibody

Explanation:

How does the spider life cycle compare with the insect life cycles?

Answers

Answer:

Spiders grow from eggs, to spiderlings, to spiders. Insects grow from eggs, to larvae, to insects.

Explanation:

Hope you have a great day :)

In the life cycle of a Spider, there are no larvae, pupae, or nymphs stage.

Explain the life cycle of a spider.

The first stage, egg

When a female has mated, she stores her spermatophores until she is ready to lay her eggs. The number of eggs is between a few and tens of thousands.

The second stage, egg sacs

The progeny develops in the egg sac, which was designed to shield the eggs from the weather and from predators like birds and ants.

The third stage, spiderlings

The young spiders that resemble their parents the most are called spiderlings.

The fourth stage, adults

The majority of spider species mature in five to ten molts. The spiderlings are prepared to reproduce and restart the life cycle once they reach adulthood.

To learn more about the life cycle of spiders, refer to

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How do you know your cell's are working?

Answers

Answer:

well your cells keep u alive kind

If they weren’t working everything would start to fail.
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