Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?


The shape of the coal changes.
Oxygen is present.
A new substance is produced.
Coal is made up of more than one element.

Answers

Answer 1
The shape of coal changes

Related Questions

What is meant by homeostasis?

Answers

Answer:

the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.

Explanation:

You push on an object with an applied force. What is the "reaction" force to your push?
the object being pulled by Earth
the object moving forward
the object pushing back on you
the object being lifted up

Answers

Answer:

the object pushing back on you

Explanation:

i put b in my test and it was wrong

and did it again and got it right

According to Newton's third law of motion, forces always act in equal but opposite pairs. Another way of saying this is for every action, there is an equal but opposite reaction. This means that when you push on a wall, the wall pushes back on you with a force equal in strength to the force you exerted.

The answer would be:

The object pushing back on you.

What is your opinion about evolution?

Answers

Answer: If people say humans evovled from monkeys..why are monkeys still HERE?????????????????????????????????????????

A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is

Answers

Answer:

9

Explanation:

“How are proteins built using the information provided by a molecule of RNA?” Remember, you are describing processes, so your predication should include steps.

Answers

Answer:  Prediction: RNA determines the sequence of amino acids in proteins and polypeptides by a two-step process: transcription of DNA produces mRNA in the nucleus, then translation of the mRNA to tRNA takes place in the ribosome in the cytoplasm.

Explanation: took test

States types of nervous systems ​

Answers

Answer:

The nervous system includes both the Central nervous system and Peripheral nervous system. The central nervous system is made up of the brain and spinal cord, and the peripheral nervous system is made up of the Somatic and the Autonomic nervous systems.

Explanation:

Answer:

The nervous system has two main parts:

The central nervous system The peripheral nervous system

Explanation:

The central nervous system is made up of the brain and spinal cord.

The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

Plz help I need help

Answers

the Cell wall is found in plant cells and not animal cells

Answer:

cell wall

Explanation:

3333333333333333333333333333333333333333333333 I'm doing this bec it won't let me send u the answer

According to the model of the human respiratory system, how do structures in the
respiratory system interact to protect the lungs? How might a sinus infection affect the
rest of the respiratory system?

Answers

Answer: The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.

Explanation:

There are Cilia that protect the airways of the lungs from invaders and pathogens by trapping them. Sinus is present in the nose which blocks the airways while it swells.

What is the respiratory system?

The respiratory system is the system that is responsible for getting oxygen into the body and removing carbon dioxide from the body.

Together, the respiratory and circulatory systems move blood and oxygen throughout the body. The trachea, bronchi, and bronchioles are the pathways by which air enters and exits the lungs. The pulmonary arteries and veins, which attach to the heart, carry blood into and out of the lungs.

Thus, there are cilia that, by trapping invaders and diseases, defend the lungs' airways. The nose has a sinus, which obstructs the airways when it grows.

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Which cell is capable of mitosis:
O a. fibrocytes
b. adipocytes
O C. chondrocytes
d. osteoblasts
e. osteoclast

Answers

Answer:

Osteoclast

Explanation:

In what ways do plants use energy

Answers

Answer:

Plants use energy in multiple ways. One way they use energy is to move. Many don't realize that plants move because their exact position does not change. However, plants do shift in order to face the sun and get more light. Additionally, plants grow. For plants to get taller and larger they need to use energy.

They use a process call photosynthesis to make food. During the process the plants trap light energy with their leaves. They use the sun and carbon dioxide with Turns into sugar with creates glucose.

so who is all virtual

Answers

Answer:

Me

Explanation:

i rather be in person

A 3-column table has 4 rows. The first column is labeled Student with entries Zack, Nicole, Christian, Abigail. The second column is labeled Food with entries Tofu, salad dressing, jelly sandwich, pasta. The third column is labeled Macromolecule with entries protein, lipid, monosaccharides, polysaccharides. Based on the data you collected, who likely left the the classroom mess? Justify your answer.

Answers

Answer:

Nicole

Explanation:

Sample Response: The mystery food sample did test positive for Sudan red. Nicole ate salad dressing, which contains fat, a lipid. She is the likely culprit.

.

.

The mystery food sample tested positive for lipids using the Sudan red indicator.

Nicole ate salad dressing.

Salad dressing contains fat, a lipid.

Nicole is probably guilty.

Based on the data you collected, Nicole likely left the classroom mess, objective was to determine the individual macronutrients.

What is Macromolecule testing?

This lab's objective was to determine the individual macronutrients in the unidentified food item that was left in the classroom. The following student is believed to have left a sample in the classroom.

Sample Reaction: The sample of the mysterious food tested positive for Sudan red. Nicole consumed salad dressing, a lipid that contains fat. She is the most likely offender.

The Sudan red indicator revealed lipids in the sample of the mysterious food. Lauren consumed salad dressing. Fat, a lipid, is present in salad dressing.

Therefore, based on the data, Nicole most likely did it.

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What has happened around Jakarta in recent years?



A.Large numbers of city residents have moved away to rural areas.



B.Buddhism has become the dominant religion.



C.Population growth has created a megalopolis.



D.Volcano eruptions have destroyed large sections of the city.

Answers

Answer:

letter b. Buddhism has become the dominant religion Ang sagot diyan

Answer: C Population growth has created a megalopolis.

Explanation: took the test

Select the statement below that is true concerning the smallpox
a. has not occurred naturally anywhere in the world since 1977.
b. All of the choices are correct.
c. has potential as a weapon of bioterrorism. d. aided European domination of new world nations.
e. has killed millions of people.​

Answers

Answer:

letter a. has not occurred naturally anywhere in the would since 1977 Ang sagot diyan

What factors may affect population growth ?

Answers

+ not having enough food for everyone
+ how many people migrate
+ birth/death rates
+ how much water there is
+ how much nutrients/minerals are available
+ how much trees/oxygen is available

Autonomic nervous system includes which one of the following?
a) Vagus Nerve (b) Hypoglossal Nerve (c) Facial Nerve (d) Olfactory Nerve

Answers

Answer:

d

Explanation:

Which one is the odd man out?
leaf of a plant
horse muscle
blood
sugar

Answers

Answer:

LEAF OF A PLANT .

Explanation:

Among the given options, The odd one out is sugar. Sugar is a type of carbohydrate that is used for energy.

Leaf of a plant: A leaf is a green organ of a plant that is responsible for photosynthesis.

Horse muscle: Muscle is a type of tissue that is responsible for movement.

Blood: Blood is a fluid that circulates through the body and carries nutrients, oxygen, and waste products.

Sugar: Sugar is a type of carbohydrate that is used for energy.

Sugar is the only one of these four that is not a living organism. The other three are all living organisms: the leaf of a plant, a horse muscle, and blood.

Here is a more detailed explanation of why sugar is the odd one out:

Leaf of a plant: A leaf is a living organism because it is made up of cells that are able to carry out the basic functions of life, such as respiration, photosynthesis, and growth.Horse muscle: A horse muscle is a living organism because it is made up of cells that are able to carry out the basic functions of life, such as respiration, contraction, and growth.Blood: Blood is a living organism because it is made up of cells, such as red blood cells and white blood cells, that are able to carry out the basic functions of life, such as respiration, transport, and immunity.Sugar: Sugar is not a living organism because it is a molecule that is made up of carbon, hydrogen, and oxygen atoms. It does not have the ability to carry out the basic functions of life, such as respiration, growth, and reproduction.

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a ___ specimen should be used for the CRP test.
A: plasma
B: serum
C: urine
D: spinal fluid

Answers

Answer:

I think your answer is B. Serum.

No links please!!!!
What is some
WATER BIOMES??
List at least 2

Answers

Answer:

ponds, lakes, river, and streams.

Explanation:

Hope this helps :)

pls mark as brainliest :p

And have an amazing day <3

During which change is heat energy absorbed?
A. Freezing
B. Melting
C. Condensation
D. Deposition

Answers

Heat energy is absorbed when boiling point comes

Hell I need answers plzz

Answers

I’m pretty sure that the will be B let me know if I’m right or not

why don't all cells have a tail

Answers

Answer:

Explanation:

As microscopes improved, biologists discovered that all kinds of cells have beating tails. They are found not only on free-living “animalcules” and sperm, but also on the cells inside multicellular organisms.

Does Windex have a higher or lower concentration of hydrogen ions compared to water

Answers

It has a Higher concentration

Replicate the following sequence:
GTA..... TAG.....ATC.....CTC

please someone help me!

Answers

Answer:

I got you.

During replication you are making a copy. Remember that DNA base pairing rules of G-C,A-T.

So for this questio

assuming 5'-3' is written it would be

GAGGATTAC. This is written in a 5' ->3' way however if the question is asking not that then I would put.

CATATCTAGGAG

Explanation:

Which of the following is an indication of a chemical reaction?
Ofreezing
O melting
O release of heat
O all of the above

Answers

Answer:

• Release of heat.

Explanation:

• In exothermic chemical reactions, heat is released due to multiple collisions of the reactant molecules.

→ Freezing and melting are physical changes.

• Other physical changes are;

sublimationcondensationevaporation

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Juan and Melissa were counting earthworms for a science experiment. They had predicted that they would find more earthworms in plots that shady and lots of damp soil. They marked out 3 meters by 3 meters plots. The shadiest plots were A and D. What is another possible explanation of the student's data?

Answers

Answer:

A

Explanation:

which scientist was responsible for disproving the theory of spontaneous

Answers

Answer:

Louis Pasteur

Explanation:

Louis pasteur
Ap3x :)

In a certain ecosystem, eagles
prey on fish. If the number of
eagles in the ecosystem increases,
the carrying capacity
A. of the fish population will go up
B. of the fish population will go down
C. of the eagle population will go down
D. will be unaffected

Answers

B. The population of fish will go down as they’re being hunted more

If the number of eagles in the ecosystem increases,the carrying capacity of the fish population will go down.

What is an ecosystem?

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Giving brainliest!!!!!!!!!!!!!!

Answers

Answer:

bacteria

Explanation:

bacteria and archaea are the only prokaryotes.

Answer:

Cycad

Explanation:

I am not 100% sure please correct me if I am wrong

Where is curriculum?

Answers

Curriculum is a standards-based sequence of planned experiences where students practice and achieve proficiency in content and applied learning skills. Curriculum is the central guide for all educators as to what is essential for teaching and learning, so that every student has access to rigorous academic experiences.
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