Unit Test — Unit test Answers

24 verified answers1 views

Which activity directly converts energy from the Sun into chemical energy?

a snake lying on a sunny rock to keep warm

a rabbit using energy from food it has eaten to run

a bean plant making its own food to grow

a person burning firewood to cook food

What are three properties of electromagnetic waves?

They travel slower than the speed of light, they include visible light waves, and they can transfer energy through empty space.

They need matter through which to travel, they travel at the speed of light, and they include visible light waves.

They travel at the speed of light, they include ultraviolet waves, and they can transfer energy through empty space.

They include ultraviolet waves, they need matter through which to travel, and they travel slower than the speed of light.

Which describes how fast-moving particles assist in transferring thermal energy to a cup after hot tea is poured into it?

They replace slow-moving particles.

They collide with slow-moving particles.

They collide with other fast-moving particles.

They are replaced by slow-moving particles.

Which condition must exist in order for conduction to occur between two substances?

The molecules of the substances must be touching.

Both substances must be the same temperature.

At least one substance must be a liquid.

Most of the molecules must be slow moving.

Did you find these answers helpful?

More from this Course