Physics exam

Question 1

What are the 3 states of matter?

Answer 1

Solids,liquids,gases

Question 2

What can solids do?

Answer 2

Hold their shape

Question 3

What do liquids do?

Answer 3

They can flow

Question 4

What can gas do?

Answer 4

Gas are spread out particles

Question 5

What keeps solids together?

Answer 5

Bonds

Question 6

How do I change a solid into gas?

Answer 6

We can melt them which turns into liquids then we evaporate it which turns into a gas.

Question 7

How do we change gas into solid?

Answer 7

We condense it turning it into a liquid then we can change it into a solid.

Question 8

What’s the process of melting?

Answer 8

The process of melting the heat energy breaks the bonds into between the particles.

Question 9

What changes in melting a solid?

Answer 9

The cold liquid moves, slowly then the hot liquids and gas move faster after evaporating the particles get bumped out of liquid.

Question 10

what’s the difference between cold solid and hot?

Answer 10

Cold solids are joint together as hot solids expand

Question 11

What’s density?

Answer 11

Density is when you measure mass(g) over volume(cm3)

Question 12

How do we measure mass?

Answer 12

Mass by using scales

Question 13

How do we measure volume?

Answer 13

length, width , height

Question 14

Write a definitions about an object floating?

Answer 14

The density is less than the density of the liquid it’s floating on.

Question 15

Why will an object float in water but not in oil?

Answer 15

Because it about 1 less dense than water.

Question 16

What is the density of water for it to float?

Answer 16

1g/cm3

Question 17

What’s the force that keeps an object floating?

Answer 17

Up thrust

Question 18

what’s the force pushing the object down?

Answer 18

Weight

Question 19

definition of cold particles

Answer 19

slower

Question 20

definition of faster particles

Answer 20

hits the walls harder more often

Question 21

definition of smaller volume

Answer 21

less pressure fewer particles

Question 22

Which pressure is greater?

Answer 22

inside

Question 23

Why does pressure increase when you go deeper into water?

Answer 23

The deeper you go the more pressure is on you

Question 24

if I throw a deodorant can in a fire what would happen?

Answer 24

Particles gain energy from heat moving faster colliding with the walls more often and harder until the pressure on the inside can’t handle it so it explodes?

Question 25

drag definition

Answer 25

If a drag has a larger surface area it collides with the movement of air particles The force slows it down?

Question 26

What does an Upthrust do?

Answer 26

Provides a little force even if it’s not floating