Science Test

Question 1

Name 2 liquids with low viscosity.

Answer 1

Vanilla extract and water

Question 2

Name 2 liquids with high viscosity.

Answer 2

Caramel and honey.

Question 3

Why do some liquids become more viscous when they are cold?

Answer 3

They don’t have as much energy.

Question 4

How would you separate a mixture of sand and iron shavings?

Answer 4

Use a magnet. The iron would stick to the magnet while the sand would be left behind.

Question 5

What is the difference between an open and closed system?

Answer 5

In an open system, matter can escape, but not in a closed system.

Question 6

What is the Law of Conservation of Mass?

Answer 6

Mass can’t be created or destroyed, it can only change form.

Question 7

What are 3 ways heat can be transferred?

Answer 7

Conduction, convection, and radiation.

Question 8

Transfer of thermal energy between two substances that are touching.

Answer 8

Conduction

Question 9

The movement of thermal energy in heated liquids and gasses.

Answer 9

Convection

Question 10

Transfer of thermal energy with no matter.

Answer 10

Radiation

Question 11

What is albedo?

Answer 11

The reflectiveness of thermal energy and light.

Question 12

What is something with high albedo?

Answer 12

Snow

Question 13

What is something with low albedo?

Answer 13

Black rocks

Question 14

What is a conductor?

Answer 14

Materials that allow heat to move easily.

Question 15

What is an insulator?

Answer 15

Materials that do NOT allow heat to move easily.

Question 16

Conductor or insulator: copper wires, nickel, pots and pans.

Answer 16

Conductor

Question 17

Conductor or insulator: styrofoam, plastic, and feathers.

Answer 17

Insulator.

Question 18

What are 5 signs of chemical changes?

Answer 18

1. Color
2. Odor
3. Light
4. Sound
5. Gas/bubbles

Question 19

What are 3 signs of physical changes?

Answer 19

1. Reversible
2. The state changes
3. Solubility

Question 20

What are 2 examples of a chemical change, and how do you know?

Answer 20

Firework- light, sound, heat, and energy are produced.

Burning paper- new substance is created, is not reversible.

Question 21

What are 2 examples of a physical change, and how do you know?

Answer 21

Ripping paper- it’s still the same substance

Freezing water- it can be reversed.

Question 22

What are the 3 main states of matter?

Answer 22

Solids, liquids, and gasses.

Question 23

Solid to gas

Answer 23

Sublimation

Question 24

Solid to liquid

Answer 24

Melting

Question 25

Liquid to solid

Answer 25

Freezing

Question 26

Liquid to gas

Answer 26

Evaporation

Question 27

Gas to solid

Answer 27

Deposition

Question 28

Gas to liquid

Answer 28

Condensation

Question 29

What is needed for a phase change to occur?

Answer 29

Energy change

Question 30

How are the molecules behaving in a solid?

Answer 30

• totally attracted to each other
• fixed pattern
• stays in one place
• definite shape and volume
• low energy
• vibrates
• molecules are very close together

Question 31

How are the molecules behaving in a liquid?

Answer 31

• weak pattern
• molecules are close together
• medium energy
• no definite shape, definite volume

Question 32

How are the molecules behaving in a gas?

Answer 32

• no pattern
• no definite shape or volume
• molecules are not attracted to each other
• move a lot
• high amount of energy

Question 33

What is viscosity?

Answer 33

A measurement of a liquid’s resistance to flow.