What is a pure substance?
A. Atoms that are all the same
B. Molecules that are identical
C. A and b
D. None of the above​

Answers

Answer 1

Answer:

option C is the correct

Answer 2
B



if yoy have notes…

Related Questions

• Explain how seismic waves affect Earth’s surface.

Answers

I think what you should say is; seismic waves can cause earthquakes which can cause destruction to buildings or our land structures.

I hope this helps!

I wasn’t sure if this was a written answer or if it was a multiple choice answer. If it was a multiple choice, don’t forget to add the options next time :)

What is the main cause of urban migration in the United States?
a.
Rural communities are no longer necessary.
b.
Urban dwelling provides better access to goods, services, and jobs.
c.
Urban communities reduce human impact on the environment.
d.
Rural communities are unable to support life in the long-term.

Answers

Answer:

b

Explanation:

because jobs are available and a better life is guaranteed too

Lara has four samples of substances:


Sample A: 5 g of salt

Sample B: 8 g of sand

Sample C: 8 g of sugar

Sample D: 5 g of sugar


Which of the following samples have the same solubility in water?


Sample A and Sample C


Sample A and Sample D


Sample C and Sample B


Sample C and Sample D



I think it is: Sample A and Sample D. Hope this helps ^^

Answers

I think you are right

Explanation:

Sample A and Sample D

If an incision cuts the body into anterior and posterior parts, the body is cut into a
plane.
O Coronal
O Sagittal
O Transverse
O Deep

Answers

The answer is coronal. When we look at imaging in radiology, coronal images slice through the body front to back like a loaf of bread.
It is the fist one coronal ;)

Some carbohydrates, such as ______________, are used as structural material in plants. For most animals, foods that contain these carbohydrates stimulate the digestive system as fiber.
A) Glucose
B) Starch
C) Cellulose
D) Glycogen

Answers

Answer:

Some carbohydrates, such as _Glucose______, are used as structural material in plants. For most animals, foods that contain these carbohydrates stimulate the digestive system as fiber.

Explanation:

please mark me brainliest please

Answer:

a

Explanation:

i took the test and that is the awnser

What do we call molecules that are only
made of hydrogen and carbon?

Answers

Answer:

Hydrocarbons

Hydrocarbons are organic molecules consisting entirely of carbon and hydrogen.

Enzymes are important for what reactions in a living system?


Enzymes are helpful but not needed for any reactions in a living system

Only the most critical reactions

Nearly all

Only a few reactions

Answers

Answer:

Nearly all

Explanation:

We need the for helping with mechanical digestion and keep our mouth moist.

Answer:

nearly all

Explanation:

because it is very helpful for us to breathe and it make our nose moist.

B
1.1.
Identify the type of tissue

Answers

Answer:

......but there is no tissue......

Which best defines carbon dioxide?


A) It is the resulting molecule when two carbon atoms bond to one oxygen atom.

B) It is the resulting molecule when one carbon atom bonds to two oxygen atoms.

C) It is the resulting molecule when one carbon atom bonds to one oxygen molecule.

D) It is the resulting molecule when two carbon atoms bond to two oxygen atoms.

Answers

Which best defines carbon dioxide?

B) It is the resulting molecule when one carbon atom bonds to two oxygen atoms.

Question:-

Which best defines carbon dioxide?

A) It is the resulting molecule when two carbon atoms bond to one oxygen atom.

B) It is the resulting molecule when one carbon atom bonds to two oxygen atoms.

C) It is the resulting molecule when one carbon atom bonds to one oxygen molecule.

D) It is the resulting molecule when two carbon atoms bond to two oxygen atoms.

Answer:-

Option B) It is the resulting molecule when one carbon atom bonds to two oxygen atoms.

Explanation:-

In carbon dioxide, carbon atoms are double-bonded to two oxygens.

Carbon dioxide (CO2) is a naturally occurring linear compound composed of two oxygen atoms covalently bonded to a carbon atom.

What is the definition of wavelength​

Answers

Answer:

The wavelength is the distance between 2 crests or troughs

(crests and troughs are the maximum upwards and downwards displacement from the equilibrium). Another way to phrase this is the length of one complete wave cycle.

(:

A potential answer to a research question is a(n)
A. theory
B. observation
C. question or problem statement
D. hypothesis

Answers

I believe it’s D hypothesis since it can be both proved and disapproved.

A research question is the basis of the experimental analysis of the subject matter. A hypothesis is said to be the potential solution to a research question. Thus, option D is correct.

What is a hypothesis?

The hypothesis has been defined as the supposition that acts as the basis of the research and experiment and has been constituted of some evidence and facts to formulate the research question.

It acts as a starting point for any investigation and research and must be falsifiable. They should be testable in order to determine the verifiability of the research topic. If the tested hypothesis is correct then further research is conducted.

It can also be defined as an educated guess that is based on some prior knowledge and facts that are deduced through experiments.

Therefore, the hypothesis is a potential solution.

Learn more about the hypothesis, here:

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3. What tool do we use to write conclusions? Briefly
summarize it.

Answers

Answer: You use a restatement of the speech's thesis; a review of the main points discussed within the speech; and a concluding device that helps create a lasting image in audiences' minds.

Explanation:

what name is given to factors that should not change in an experiment, science changes might affect the outcome

Answers

Answer: These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist.

Explanation:

define the purpose for the field of biology

Answers

biology is a branch of science that deals with living organisms and their vital processes.

Answer:

As a field of science , biology helps us understand the living world and the ways its many species (including humans ) function, evolve, and interact. advances in medicine , agriculture , biotechnology, and many other areas of biology have brought improvements in the quality of life

What conclusion can you draw about the organisms you observed?Write and evidence-based claim

Answers

Answer:

Bacteria is very small to see so you need an micro scope to

see it

Explanation:

HELPPPPP ASAP
What characteristic of life is related to a organ transplant

Answers

Answer: personality

Explanation: after an organ transplant some people have had personality changes I hope this helps I’m sorry if I get it wrong :(

Visualize It!
6 Identify Name three examples of matter found in
this photo.

Answers

Answer:

bag, human beings and bridge

3
Kevin experimented to find the effect of exercise on his body temperature. The steps of his experiment are shown below.
1. Measure his body temperature
2. Run in place for three minutes
3. Drink a glass of water
4. Measure his body temperature again
Which step in Kevin's experiment was NOT needed?
OA. 2
ОВ. 1
OC. 3
D. 4

Answers

Answer:

eghydew

Explanation:

hgdvfgjhedbfefg

Answer:

the answer is C.3

Explanation:

yw bye have a good day

Certain traits, such as color blindness, are determined by an X-linked recessive gene. A couple in which both have normal vision have a color-blind son. The probability of this couple having a daughter who is a carrier is

Answers

Answer:

A daughter can become a carrier in one of two ways – she can acquire the ‘gene’ from a carrier mother or from a color blind father.

Explanation:

If a woman has only one color blind ‘gene’ she is known as a ‘carrier’ but she won’t be color blind. When she has a child she will give one of her X chromosomes to the child. If she gives the X chromosome with the color blindness ‘gene’ to her son he will be color blind, but if he receives the X chromosome which doesn’t carry the color blindness ‘gene’, he won’t be color blind.

A color blind boy can’t receive a color blind ‘gene’ from his father, even if his father is color blind, because his father can only pass an X chromosome to his daughters.

A color blind daughter therefore must have a father who is color blind and a mother who is a carrier (who has also passed the color blindness ‘gene’ to her daughter). If her father is not color blind, a ‘carrier’ daughter won’t be color blind. A daughter can become a carrier in one of two ways – she can acquire the ‘gene’ from a carrier mother or from a color blind father.

what is corona virus and its symptoms?​

Answers

Answer:

 fever, cough and shortness of breath. In more severe cases, infection can cause pneumonia, severe acute respiratory syndrome and sometimes death.

Can you observe cells with the naked eye? Explain.

Answers

Answer:

No

Explanation:

According to science, human beings can't observe cells and other tiny organisms with our naked eyes coz our eyes aren't strong enough to observe but we can use a microscope which has strong lenses.

As cell is a tiny microscopic structure, it can be visible under microscope only.

what are the types of cell ?

Cell is the basic unit of any living organism, can be observed in animal, plant, microbes etc; Bacteria are unicellular in nature, all higher eukaryotic organisms are multicellular in nature like plants and animal cell.

The simplest type of cells are prokaryotic cells have a cell membrane, cytoplasm where all of the metabolic processes occur, ribosomes where protein synthesis occur, and nucleoid which carry genetic information, reproduce by binary fission.

The eukaryotic cells have cell membranes, cytoplasm, ribosomes, and nucleus a house of DNA, rough endoplasmic reticulum for protein assembly, smooth endoplasmic reticulum for lipids, Golgi apparatus for protein sorting and exporting.

It has mitochondria energy house, a cytoskeleton for structure and passes information, and  lysosomes or peroxisomes for digestion of waste, vacuoles for water storage, chloroplasts for photosynthesis.

For more details regarding cell, visit:

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Which change of state is shown in the model?

A. condensation
B. evaporation
C. sublimation
D. deposition

Answers

Hey there!

The correct option is:

B. Evaporation

Explanation:

Because the molecules inside the jar are moving upwards, which shows Evaporation.

Hope it help you

The activation energy of a reaction can be decreased by

A.
increasing the concentration of the reactants.

B.
increasing the temperature.

C.
increasing the pressure of gaseous reactants.

D.
adding a catalyst.

Answers

Hi,

The answer is D

Hope this helps

an organic compound with a ratio of one carbon atom to two hydrogen atoms to one oxygen atom is a(n)--------------------------------

Answers

Answer:

Neutron

Explanation: If you mix all of these, they form a neutron.

A truck start to move from rest.If is acceleration by 2m/s/s calculate the final velocity of 20 second.​

Answers

Explanation:

v2 = v1 + at

v1 = 0

a = 2m/s

t = 20

v2 = 2 ×20 = 40 m/s

Name the TWO planets in our solar system where there are life forms

Answers

Answer:

Jupiter and Mars, probably Saturn too

Explanation:

blank makes up cell membranes​

Answers

Phospholipids : This makes up the bi-layer which is the membrane's basic structure and has great control over what can enter and exit the cell, due to their hydrophobic tails and hydrophilic heads.

Cholesterol : This also controls entry and exit of substances as it also exhibits hydrophilic heads and hydrophobic tails. It also stabilises the membrane and affects its fluidity (the more there is, the more fluid is the membrane.)

Glycolipids : Those can act as receptor molecules (essential for cell-signalling), antigens and in cell-adhesion

Answer:

glycerophospholipids

Explanation:

With few exceptions, cellular membranes — including plasma membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains.

If this is correct please give me Brainliest.

is protein alive? explain why or why not

Answers

Answer:

Yet even an intact human brain can be biologically alive but incapable of consciousness, or “brain-dead.” Similarly, neither cellular nor viral individual genes or proteins are by themselves alive.

Explanation:

neither cellular nor viral individual genes or proteins are by themselves alive.

Identify a global challenge and explain how science and technology can address
this challenge

Answers

A typical global challenge is "Climate Change"

The term "Climate Change" is also referred to as "Global warming" and its encompasses the cause and effect of long-term changes of temperature and weather patterns across the globe.

Science and technology have a major role to play to combat this challenge and this is as follows

New technologies should replace old technology polluting the atmosphere and ensure the new technology have low-carbon innovation.After thorough research, scientist should make effort to make people understand how lives are impacted by climate change and what to do to reverse the changes.

Learn more about Climate change here

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apakah yang berlaku pada isi padu air semasa pemanasan?

Answers

432243336777888trrtuu
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