Chemistry Middle School

HELP PLEASE I dont understand this (7th Grade science)

HELP PLEASE I Dont Understand This (7th Grade Science)

Answers

Answer 1
For the second one it is physical
Answer 2
The first is chemical

Related Questions

when heat is removed from a substance, describe how are the molecules affected

Answers

Answer: look at explanation

Explanation: When heat is removed from a substance, the kinetic energy of the molecules decreases (the molecules start to move more slowly).

The changes are caused by the tendency of the system to reach equilibrium and when the surroundings of the substance have lower kinetic energy, heat is transferred to reach thermodynamic equilibrium.

What's happening in whole is that there is a temperature gradient (difference) between the substance and its surroundings, and for eliminating this gradient, heat flows from the hotter substance to the colder surroundings, for them to have the same temperature.

The temperature of the substance decreases because its molecules have lower kinetic energy.

PLEASE HELP ASAP
Avanti works in a bookstore. She has four books and is going to place them in two stacks. The diagram above shows the books before they touch. Use the information in the diagram to answer the question.
How did the temperatures of the four books compare before they touched?

Answers

They were different and they could be the top book was different from the bottom

What is a typical way for the driver to change the motion of the car?



A. apply a horizontal force by using the brakes




B. change the mass of the car




C. balance the forces acting on the car




D. remove the friction between the car and the road

Answers

Answer:

Explanation: the friction between the ground and the car will most definitely not change unless you rather balance the force out or force to use brakes

Its is C balance the forces acting on the car



I hope this helped :)

Has negative values

Group of answer choices

Celsius and Fahrenheit

Celsius and Kelvin

Fahrenheit and Kelvin

Answers

Answer:

Explanation:

Celsius and Fahrenheit

They have negative values but not Kelvin as its lowest is O Degree Kelvin.

Hope this helps!

BRAINLIEST ME PLS!!!

PLease help Will give brainliest

Answers

Answer:

um ewww

Explanation:

10. i think is c

11.  i think i d

Hope this helps!

10. c

11. a

I hope this helps

Help Please! its another cell functions

Answers

Answer: last option!

Explanation:

Answer:

The oxygen molecules will spread out evenly and many will enter the cell by passing through tiny openings in the membrane.

Explanation:

A cell membrane will allow the oxygen to enter by diffusion. Diffusion is the movement of particles from an are of higher concentration to an area of lower concentration. Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion.

What are three types of variations within populations or species?

Answers

I honestly don’t know I just need points sorry
Tip for getting answers: copy and paste your question and put it in “”

trigger warning/ su1cide
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how do you break up with someone over text because hes saying he’ll k1ll himself if you dont do what he wants you to do?

Answers

Answer:

tell his family about how he's manipulative or make him realize that even if you guys are still together you don't have feelings anymore

Answer:

what is the thing he wants you to do? this is hard. do you think he is serious and he will actually do it? if not, it's not worth the pain of staying in a relationship.

Explanation:

How do landmasses impact the movement of air and water?



(A) They stop all movement of both air and water.


(B) They speed up the air and water and allow it to pass though.


(C) They change the direction and slow them down.


(D) They slow down the air but speed up the water.

Answers

I think that the correct answer would be b

Another oddly specific question reeeeeeeeee. What causes the difference in air pressure around the Earth? A.
The warm air sinks at the poles and cold air rises at the equator.

B.
The warm air rises at the equator and cold air rises at the poles.

C.
The warm air sinks at the equator and cold air rises at the poles.

D.
The warm air rises at the equator and cold air sinks at the poles.

Answers

Answer:

A

Explanation:

Answer: The answer would be A!

Explanation: Hope I helped you! ^^

Please help me ASAP!!!!

Answers

Answer:

1. A

2. A

3. C

Explanation:

The answers are 1a. 2b. 3c.

Help,

The question is down below

Answers

Answer:

C. A new gas was created and the gas took up more space

Answer:

C

Explanation:

make it look messy

Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time.

Answers

Weater go short term conditish when climate is weather kf tegion

i hope that’s messy enough???

Help me please!!!!!!!!!

Answers

Answer:Pores,collar,spicules

How does brittleness of graphite compare to diamonds?

Graphite is more brittle than diamonds.
Graphite is less brittle than diamonds.
Graphite has the same brittleness to diamonds.
Graphite and diamonds are both very brittle.

Answers

The first one I think

Answer:

A

Explanation:

Because Graphite is more brittle than diamonds.

hope this work.

Please answer each question! Due today! Will mark brainliest!

1.) How does hydrokinetic energy connect to magnetism?
2.) How does hydrokinetic energy connect to circuits?
3.) How does hydrokinetic energy connect to magnets?
4.) How does hydrokinetic energy connect to electrical charges?
5.) How does hydrokinetic energy connect to the parts of waves?

Answers

Answer:

1.They generate power only from the kinetic energy of moving water (current).

2.relating to the motions of fluids or the forces which produce or affect such motions — compare hydrostatic.

3. It uses water motion to generate a high-pressure liquid rather than electricity.

4. tidal currents, ocean currents or river currents into electrical power.

5.When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream.

Explanation:

Which water feature is often associated with condensation?
Frozen lakes
The ocean
Clouds and fog
Water vapor rising from plants

Answers

I think it is water vapor since condensation is the process of water vapor going back to liquid water.

Clouds and fog are water features often associated with condensation. The correct option is C.

The process by which water vapour, a gaseous form of water, changes into liquid water is called condensation.

When warm, moist air meets a cooler surface or when the air itself cools, it happens. As a result of this cooling, water vapour loses energy and condenses into tiny water droplets or ice crystals, which are what are seen as clouds or fog.

Even though the ocean and frozen lakes are both connected to water, condensation is not a direct result of either of these. As opposed to condensation, water vapour rising from plants is a result of transpiration.

Thus, the correct option is C.

For more details regarding Condensation, visit:

https://brainly.com/question/956180

#SPJ6

Your question seems incomplete, the probable complete question is:

Which water feature is often associated with condensation?

A. Frozen lakes

B. The ocean

C. Clouds and fog

D. Water vapor rising from plants

ANSWER ASAPP GIVING BRAINLIEST AND STUFF!
Write a short paragraph about electrical current using the terms conductor and insulator.

Answers

In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. ... Most atoms hold on to their electrons tightly and are insulators.


I believe that’s what your talking about if not I’m so sorry

Answer:

Bet

Explanation:

In a conductor, electric current can flow freely, in an insulator it cannot. "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. ... Most atoms hold on to their electrons tightly and are insulators.

Why is it not easy to replace a link in a food chain?

The decomposers will not decompose another type of organisms.
There are not enough plants to replace the previous organisms.
There are not enough animals to replace the previous organism.
There may be limited type of natural predators organisms may have.

Answers

Answer:

D-the last option

Explanation:

I think I'm correct.

Why does a nucleus always have a positive charge?

pls answer or else I will give you up.

Answers

Answer:

Nucleus has a positive charge as it has protons, which are positively charged inside it.

This is because the nucleus has protons. The atoms do not have a charge because the negative electrons and positive protons cancel eachother out causing the atom to be considered neutral. Hope this helps

Which food combination produces a protein complete meal?
white rice and broccoli
brown rice and beans
white bread and cheese
peanut butter and jelly

Answers

Answer:

brown rice and beans

Explanation:

because the rice is really filling and healthy while beans have proteins

Answer:

the second option

Explanation:

hope this helps

Why does mantle rock begin to sink back towards the lower mantle from the area closest to the crust?
(Science/Plate Tectonic Movement)

Answers

Answer: Convection Currents

Explanation: The mantle rock is solid and denser because it is cooler. This means it will sink closer to lower mantle as warmer, lense dense rock/magma moves upwards.

PLZZ HELPPP FRLLL IM GONNA GET MY LIFE ENDED

Answers

Not completely sure but I think it's

Answer: Local winds affect a smaller area while global winds affect a larger area

Explanation: This is because local winds affect certain areas and global winds go all around the planet
It is the last option because weather can vary within different places. A global wind means spread out and more expanded, but a local area is one nearby, taking place of a smaller area.

In which direction does heat move?

Group of answer choices

hot to cold

cold to hot

It can move in either direction.

Answers

Heat moves from hot to cold.
Hot towards cold !

Heat only moves in one direction only.

Used to measure temperature in 8th grade science.

Group of answer choices

Celsius

Fahrenheit

Kelvin

Answers

Answer:

Fahrenheit

Explanation:

Help?
The question is down below.

Answers

The first three are T I don’t know about the next two and the last one is T
I believe first one is T. The next one atoms are composed of smaller particles of matter so I think T. The third one is T. The fourth is T. The fifth might be false. And lastly atom is a small part of matter so false maybe. If that makes sense

help with thisss please :)​

Answers

Cosh(2^3g+40 I think this is the answer

What are the physical properties of the cookie/cracker? List 3 or more.

Answers

Answer

cookie

shape:circle

texture: bumpy rough on side

color:brown

size: bigger than a quarter

Explanation:

I cant see it so just describe the color shape size texture

Answer:

1. Delicious

2. Soft

3. Cronchyy (ik its crunchy )

4. Best foods you will ever eat

Explanation:

Try it for yourself!

A truck was carrying a substance in a tank. The molecules of that substance were moving away from each other. The truck parked overnight in a place where energy transferred out of the substance. In the morning, the substance was a gas. How were the molecules moving in the morning? Explain why the molecules were moving that way after energy was transferred out of them.

Answers

Answer:It might have been what was in the substance like salt for the mattter

Explanation:

After parking overnight, where energy transferred out of the substance, in the morning, the substance was a gas. Hence, the molecules were moving away from each other too

What type of tide is Australia likely to be experiencing in the diagram on the RIGHT and why? In your own words explain what is happening?

Answers

Answer:

Spring tides are extremely high and extremely low. This is created when the sun and moon pull together.

Explanation:

From the diagram, the type of tide Australia is likely to be experiencing is: neap tides.

A tide can be defined as the rise and fall of water level in water bodies such as lakes and oceans, especially due to the gravitational force of attraction exerted by the Moon and Sun on planet Earth.

Generally, there are two (2) main types of a tide and these include:

High tide.Low tide.

Additionally, the two (2) form of a tide are:

I. Spring tide: it occur s twice each month close to the the full and new

moons, especially when the  Moon and Sun pull together.

II. Neap tide: it occurs two times in a month when the Moon is close to its first  and last quarters, especially when the  Moon and Sun pull at a right angle.

From the diagram, the type of tide Australia is likely to be experiencing is neap tides because it happened when the Moon is close to its first  and last quarters and the  Moon and Sun were pulling at a right angle.

Read more: https://brainly.com/question/21694593

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