If you were making observations of someone mixing two substances together, how would you know if a chemical reaction took place?

Answers

Answer 1

if you were making an observation of two substances, The five conditions of chemical change would be color chage, formation of a precipitate, formation of a gas, odor change, temperature change. i hope this helps


Related Questions

WHAT CAN LARGE CELLS DO TO INCREASE THEIR TOTAL SURFACE-TO-
VOLUME RATIO?

Answers

Answer:

infolding of membranes

look at a picture of a mitochondria the cristae are a great example of this weaving in and out of the center of the organelle to increase surface area

Explanation:

Jack is heterozygous for mid-digit hair What is Jack's genotype?

Answers

Answer:

might help to add the answer choices, if this is a multiple choicer. if he's heterozygous , his genotype will be a capital and a lowercase, like Hh or Pp

Explanation:

hope this helps

Any help is appreciated.

"Energy inputs occur via __________ or ingesting food; this energy drives the flow of matter into and out of the cell. The energy is released by __________ and eventually cycles back into the ecosystem as __________."

A. photosynthesis; respiration; waste
B. photosynthesis; respiration; heat
C. respiration; photosynthesis; waste
D. respiration; photosynthesis; heat

Answers

Answer:

photosynthesis; respiration; heat

Explanation:

A boundary formed when two plates move past each other

Ocean basin
Divergent boundary
Transform boundary
Convergent boundary

Answers

Answer:

transform boundary

Explanation:

A transform boundary is when two plates slide past each other

divergent boundary is when two plates move away from each other

convergent boundary is when two plates crash into each other

A boundary formed when two plates move past each other is  transform boundary. among all the given options, the correct option is option C.

What is transform boundary?

A transform border is when two tectonic plates of the Earth pass one another. The interaction between the two plates as they pass one another might result in localized faults or fissures. The fundamental description of a transform border is as follows, however they are more complex than that.

Divergent borders and convergent boundaries are two more forms of boundaries that are different from transform boundaries. The tectonic plates interact with one another at convergent borders while they separate from one another at divergent limits. A boundary formed when two plates move past each other is  transform boundary.

Therefore, the correct option is option C.

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Western boundary currents _____.

a. always travel northward
b. transport heat towards the poles
c. transport heat away from the poles
d. run along the eastern boundaries of ocean basins
e. travel along the equator

Answers

The answer ➪ run along the eastern boundaries of ocean basins.

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Professor Tan studies water quality in streams near chemical plants. Which is a type of qualitative data that Professor Tan should record during these studies?

A.the pH of the water
B.any occurrences of unusual odors
C.the oxygen concentration of the water
D.any changes in sizes of fish population

Answers

Answer:

A

Explanation:

chemical plants can affect ph level studying water quality narrowed it down to A and C. Then putting chemical plants makes it A.

What type of stars are located in the top right of the H - R diagram

Answers

Answer:

The main sequence stretching from the upper left (hot, luminous stars) to the bottom right (cool, faint stars) dominates the HR diagram. It is here that stars spend about 90% of their lives burning hydrogen into helium in their cores. Main sequence stars have a Morgan-Keenan luminosity class labelled V.

Explanation:

PLEASE ANSWER! Will give brainliest! ❤️

Answers

Answer:

you are right

Explanation:

Which of the following does not happen during photosynthesis?

Question 3 options:

O2 is given off


Glucose is made


The sun's energy is reflected


Chlorophyll absorbs the sun's energy

Answers

Answer:

The sun's energy is reflected

A planet's revolution around
the sun can be modeled by
swinging a ball on a string in
a circle. In this model, which
of the following represents
gravity holding the planet in
orbit?
A. The ball
B. The string
C. The direction the ball is moving

Answers

B:The string
Without it the ball would just roll away/ fly away

Please Help!!
Which of the following statements is true of living systems!

Answers

answer: B
step by step explanation:

Find the solution of the system
-2x-2y=28
2x+4y=-42

Answers

Ok. So I used Elimination method. You could also use Substitution. Put the two equations on top of each other, as if you were adding and subtracting. Then decide whether to add of subtract, as the whole purpose of this method is to eliminate a variable. The x was eliminated. Then you can solve to get y.

Going back to one of the ORIGINAL equation, sub in your y and solve. Then you can put your x and y into an order pair (x,y). That pair is your answer!

Hope that helps! If more clarification is required, leave a comment!

help please biology 1

Answers

Answer:

frvfeavdsfgrz

Explanation:

Please help!!! Which of the following happens during interphase

Answers

Answer:

A

Explanation:

3. Which gymnosperms are the oldest, tallest plants found in a forest?
A. welwitschias
B. ginkgoes
C. cycads
D. conifers

Answers

Answer:

The answer is D

Explanation:

Conifers

Answer:

I hope this helps. ✨God Bless✨

Explanation:

Which claim made in the speech is supported by reasons or evidence?

"You might have to read something a few times before you understand it."

"You don't hit every note the first time you sing a song."

"You're not a varsity athlete the first time you play a new sport."

""The story of America isn’t about people who quit when things got tough."

Answers

Answer:

The first one

Explanation:

This because in learning you have to get the clear picture of what you are doing before understanding drops in

plssssss help Im giving almost all my points

Answers

Answer:

Eastern Africa consists largely of plateaus and has most of the highest. ... The Western Rift Valley curves along the western borders of Uganda and Tanzania. ... Apparently established in the 9th century, it is distinguished for its seawalls of coral

hope this was helpful

Explanation:

why do you think there is so much life on our planet ?

Answers

Answer:

Earth's atmosphere and surrounding supports life.

Explanation:

The oxygen, nitrogen and carbon that's abundant on Earth promotes life.

Our atmosphere is made up of oxygen, nitrogen, and carbon dioxide which are elements that help us survive.

As the deer population increases in size, how will its growth rate affect its population density?

Choose 1 answer:

(Choice A)


Population density decreases.

(Choice B)


Population density increases until resource limits are met.

(Choice C)


Population density grows indefinitely.

(Choice D)


Population density remains constant.

Answers

Answer:

(Choice B)

Population density increases until resource limits are met.

Explanation:

Answer:

more answering room

Explanation:

YASSSSSS

Explain why the Moon, stars, and sun appear to change positions in the sky.

Answers

Answer:

because the earth rotates and revolves around a axis causing the stars sun move to change position and shape

The moon, stars, and sun appear to change positions in the sky because of the rotation of the earth on its axis, and due to the combination of the earth's rotation and its orbit around the sun, as well as the moon's orbit around the earth, their positions change.

What are the positions change of the moon, stars, and sun?

The Earth rotates on its axis once every 24 hours, causing the Sun, Moon, and stars to appear to move across the sky; this motion is caused by the Earth's rotation, and the position of the Sun in the sky also changes throughout the year due to the Earth's orbit around the Sun. As the Earth moves in its elliptical orbit, the angle of the Sun's light hitting the Earth changes, and the Moon appears to change positions in the sky because of its orbit around the Earth, so all three change positions.

Hence, the moon, stars, and sun appear to change positions in the sky because of the rotation of the earth on its axis.

Learn more about the moon, stars, and sun here.

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which resource is nonrenewable
A.soybeans
B.sunlight
C .copper
D . cattle

Answers

Answer:

copper

Explanation:

Copper is your answer because it is nonrenewble

Hope this helps u:)

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n1
Which process is necessary for the formation of igneous rocks?

Answers

The proccess is when magma from inside a volcano cools and crystalizes outside the volcano then it becomes igneous rocks.

PLEASE HELP ME FOR 45 POINTSS!!!! ANSWER WILL GET BRAINLIEST!!!!



Mr. Carmen asked his class to observe the following events.

steel wool rusting
wooden splints burning down to ashes
sandstone crumbling when tapped with a hammer
an antacid tablet releasing carbon dioxide bubbles in water
Which of the events produced a physical change?


A. steel wool rusting


B. wooden splints burning down to ashes


C. sandstone crumbling when tapped with a hammer


D. an antacid tablet releasing carbon dioxide bubbles in water

Answers

Answer:

I believe your answer should be C good human :3

Explanation:

The answer is c..........

From the top of the stiffer mantle to the center of earth, the rock material is inferred to be

(1) solid all way to the center of the inner core

(2) solid, then liquid to the center of the inner core

(3)solid, then liquid, then solid again to the center of the inner core

(4) solid, then liquid, then gaseous to the center of the inner core

Answers

Answer:

2

Explanation:

The earth goes from solid to liquid

Which of these presents an ethical issue associated with genetic testing on humans?

Genetic testing could cause harmful mutations.

Genetic testing could improve the diagnosis of disease.

Genetic testing could cause job discrimination by revealing health risks.

Genetic testing could cause ecosystem damage by accelerating evolution.

Answers

Answer:

c. Genetic testing could cause job discrimination by revealing health risks.

Explanation:

Answer:

For the third time I need points and it is C

Explanation:

In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result?

Answers

Answer:

Eventually, the environment will be unable to support the production of wildebeests, this will cause there to be a loss of vegitation that then causes a food shortage, and then the wildebeests will starve.  

Explanation:

It's a very unhappy process, but those herds who don't migrate to another pasture will starve and die. The death will depopulate the savanna and give the fields some time for regrowth and the cycle will begin again.

Hope this helps! :)

How is sedimentary rock layers used to provide evidence for evolution?

Answers

Answer:

its not only provide evidence of the history of earth but it also of changes in organisms whose fossil remains have been found in layers

Explanation:

hopes this helps!

The reason the lactase gene is made is due to ?

Answers

Answer: milk is present in the digestive system, which turns on the gene for lactase.

Explanation:

Hich statement best describes a change that usually takes place in the human body when the heart rate increases as a result of exercise?

Answers

Complete Question:

Which statement best describes a change that usually takes place in the human body when the heart rate increases as a result of exercise?

Group of answer choices.

A. More oxygen is delivered to muscle cells.

B. Blood cells are excreted at a faster rate.

C. The rate of digestion increases.

D. No hormones are produced.

Answer:

A. More oxygen is delivered to muscle cells.

Explanation:

An aerobic exercise refers to all forms of physical activity that an individual engages in, so as to increase the heart rate (from low to high intensity) in response to the level of oxygen required by any activated or working muscle in the human body.

Generally, aerobic exercise help various individuals to prevent cardiovascular diseases because it makes the heart to beat faster (heart rate increases) to enable it supply more oxygen, which makes the heart to effectively and efficiently pump blood more.

Some examples of aerobic exercise (cardiofitness activity) includes cycling, swimming, jogging, walking, skiing etc.

Hence, the statement which best describes a change that usually takes place in the human body when the heart rate increases as a result of exercise is that more oxygen is delivered to muscle cells.

Combustion reaction
In general, for complete

combustion:

hydrocarbon + oxygen → carbon dioxide + water

i don't know​

Answers

Answer:

The reaction in the diagram is right.

Explanation:

In complete combustion, hydrocarbon fuels burn in the presence of high concentration of oxygen that produces carbondioxide gas and water which are releases in the atmosphere. Complete combustion takes place only when there is oxygen present in large amount whereas incomplete combustion occurs when the oxygen in the environment is limited so complete combustion required more oxygen as compared to incomplete combustion.

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