Science Midterm

Question 1

What is matter?

Answer 1

anything that has mass and takes up space

Question 2

What is an atom

Answer 2

the building block of all matter, the smallest unit of an element

Question 3

What is an element

Answer 3

specific atom

Question 4

What is a molecule

Answer 4

formed when atoms bond together

Question 5

What is the difference between atoms and molecules

Answer 5

Atoms are one thing, but molecules are when two or more atoms come together

Question 6

What are the 3 primary gases that make up our atmosphere

Answer 6

Nitrogen, Oxygen, Argon

Question 7

Discuss if air pollution is worse during summer or winter and provide reasoning

Answer 7

It is worse in the winter because all the bad air drops down to the earth. After all, it gets colder, and cold air sinks.

Question 8

What are examples of air pollution

Answer 8

Ozone, Lead, and Nitrogen Dioxide

Question 9

What are causes of air pollution

Answer 9

Factories, cars, and trains

Question 10

Solid characteristics

Answer 10

Definite shape, definite volume, and particles vibrate

Question 11

Liquid characteristics

Answer 11

No definite shape, definite volume, and particles move over each other

Question 12

Gas characteristics

Answer 12

No definite shape, No definite volume, and particles are very far apart

Question 13

What happens if heat is added to a solid

Answer 13

It melts into a liquid

Question 14

What happens when heat is added to a liquid

Answer 14

It evaporates into a gas

Question 15

What is the difference between heat and temprature

Answer 15

Heat is the transfer of kinetic energy from one medium or object to another, and temperature is the average kinetic energy.

Question 16

Effect of heat on density

Answer 16

When you add heat to dense things the molecules move faster and farther apart making them less dense.

Question 17

Order the states of matter from most dense to least dense and provide reasoning

Answer 17

Solid is the densest because molecules are close. Then liquid because the molecules are still kind of close together. Least dense is gas because the molecules are really far apart.

Question 18

Will hot water and cold water mix

Answer 18

If hot water is put on top of cold water it would not mix because hot water is less dense

Question 19

Condensation

Answer 19

Gas to water

Question 20

Evaporation

Answer 20

Liquid to gas

Question 21

Melting

Answer 21

Solid to Liuid

Question 22

Freezing

Answer 22

Water to solid

Question 23

Sublimation

Answer 23

Solid to Gas

Question 24

Deposition

Answer 24

Gas to solid

Question 25

Independent Variable (IV)

Answer 25

the variable that is manipulated in an experiment

Question 26

Dependent Variable (DV)

Answer 26

the variable that is affected in an experiment

Question 27

Constant

Answer 27

Factors that stay the same between the different groups in an experiment

Question 28

What is an insulator.

Answer 28

materials that transfer heat slowly

Question 29

Examples of insulators

Answer 29

A woolen hat and a thermos

Question 30

What is a conductor

Answer 30

Materials that transfer heat quickly

Question 31

An example of a conductor

Answer 31

Diamond and copper pot

Question 32

What are some parts of the water cycle with definition

Answer 32

Evaporation: liquid to gas
Transpiration: water from plants to gas
Condensation: gas to liquid
Precipitation: Water flls down to earth
Runoff: water that runs down a hill

Question 33

What is a water transfer with ex.

Answer 33

Moving water. Ex: waterfall, stream, creek

Question 34

What is a water resevoir with ex

Answer 34

Standing water. Ex: Lake, ocean, swamp

Question 35

What causes water to move

Answer 35

gravity