Science Quiz

Cutting too many trees will MOST LIKELY cause:

• More oxygen in the air

• Less flooding in rivers

• Loss of animal habitats

• Increase in soil fertility

Why does a metal spoon feel colder than a wooden spoon in the same room?

• Metal is heavier than wood

• Metal is a good conductor of heat

• Wood produces heat

• Wood has more mass than metal

A glass of cold water is left outside. Drops of water form on the glass. What process is this?

• Evaporation

• Condensation

• Freezing

• Melting

Why does a balloon rubbed on hair stick to a wall?

• It becomes magnetic

• It produces gravity

• It has electric charges

• It becomes heavier

Why does Earth not fall into the Sun?

• The Sun pushes Earth away

• Earth is too heavy

• Earth's speed balances the Sun's gravity

• The Moon protects Earth

Which situation BEST shows transformation of chemical energy to mechanical energy?

• Turning on a flashlight

• Eating food and then running

• Charging a cellphone battery

• Burning wood for light

A boy uses a ramp to push a heavy box into a truck. Why is the ramp helpful?

• It removes gravity

• It reduces the distance

• It decreases the needed force

• It makes the box lighter

Which change shows a chemical reaction?

• Ice melting

• Paper burning

• Water boiling

• Salt dissolving

A balloon is inflated with air. Why does it expand?

• Air disappears

• Air has mass and takes up space

• Air becomes heavier

• Air turns into liquid

Which action is a physical change in food?

• Baking a cake

• Frying fish

• Cutting an apple

• Burning rice