Solid, Liquids, and Gases (Lesson 1, States of Matter)

Question 1

What is a solid?

Answer 1

Something that has a definite shape and a definite volume.

Question 2

What arrangement do the particles in solids have?

Answer 2

They are fixed in a closely packed arrangement.

Question 3

Do the particles in a solid move?

Answer 3

They vibrate in place

Question 4

What are crystalline solids?

Answer 4

Solids that have particles that form regular, repeating patterns. These patters create crystals

Question 5

What are some examples of crystalline solids?

Answer 5

Salt, sugar, and snow

Question 6

What are amorphous solids?

Answer 6

Solids that don’t have particles arranged in a regular pattern.

Question 7

Do crystalline solids melt at a distinct temperature?

Answer 7

Yes

Question 8

Do amorphous solids melt at distinct temperature?

Answer 8

No, they just become softer or change into other substances.

Question 9

What are some examples of amorphous solids?

Answer 9

Plastics, rubber, and glass

Question 10

What is a liquid?

Answer 10

Something that has a definite volume but no shape of its own.

Question 11

What arrangement do the particles in a liquid have?

Answer 11

They are close together but not as close as solids.

Question 12

Do the particles in a liquid move?

Answer 12

They move around each other freely.

Question 13

What is another name for a liquid, and why is it called that?

Answer 13

Fluid, because they flow

Question 14

What is surface tension?

Answer 14

A property of liquids where the molecules bring the molecules on the surface closer together because they are attracted to each other. This is what causes water droplets.

Question 15

What allows water strider insects to walk on the surface of water or a needle to sit on top of the water?

Answer 15

Surface Tension makes the surface of a liquid act like it has a skin.

Question 16

What is viscosity?

Answer 16

A property of liquids where the size and shape of its molecules create resistance to flowing.

Question 17

Do all liquids have the same viscosity?

Answer 17

No, some liquids flow easier than others. High viscosity liquids flow slow and low viscosity liquids flow easily.

Question 18

What is an example of a liquid with high viscosity?

Answer 18

Honey

Question 19

What are some examples of liquids with low viscosity?

Answer 19

Water and vinegar

Question 20

What is a gas?

Answer 20

Something that does not have a definite shape or a definite volume. As gas particles move, they spread apart, filling all the space available.

Question 21

When working with a gas, what three things are important to know about it?

Answer 21

The volume, temperature, and pressure

Question 22

What is volume?

Answer 22

The amount of space that matter fills.

Question 23

How do we know what the volume is of a gas?

Answer 23

Gas fills the size of the object that it is in.

Question 24

What is pressure when talking about gas?

Answer 24

The force of its outward push divided by the area of the walls of the container. Pressure = Force/Area

Question 25

What determines the firmness of a gas filled object?

Answer 25

The amount of pressure from the gas.

Question 26

What determines higher gas pressure?

Answer 26

Greater concentration of gas particles inside an object.

Question 27

Why does a ball leak when it only has a tiny hole?

Answer 27

The higher pressure inside the ball results in gas particles hitting the hole more than the gas particles outside the ball hitting the hole. The pressure inside will drop until it is equal to the pressure outside.

Question 28

What is temperature?

Answer 28

The measure of the average energy of random motion of particles of matter. The faster the particles are moving, the greater their energy and the higher the temperature.

Question 29

At room temperature, do gas particles move fast?

Answer 29

Yes! about 500 meters per second, twice the speed of a jet plane.