When light from the sun reaches a clear window, some

of the light is ______________ off of the smooth glass.

Light makes plants grow, radiometers __________, and light- sensitive paper change color.

A solar cell produces _____________ by using light energy from the sun.

Solar __________ are useful for things that need electricity but are not near an electrical outlet.

Solar cells are also useful to move things. For example, scientists can build cars that never need _________.

The Earth's major source of energy is -

Read this sentence from the text.

So they are looking for new, alternative sources of energy that won't run out.

What does the word new mean in the sentence?

Which statement explains what happens when the sun's rays hit solar panels?

Read this sentence from the text.

That means it isn't made, or changed, by people.

Which word sounds like another word that means "a person paid to clean a house."

Which word sounds like Sun but has a different meaning?

Read these sentences from the text.

More companies are turning to solar power to replace fossil fuels. It's natural. That means it isn't made, or changed, by people. Solar power is cheaper than fossil fuels, and it does not create pollution.

Which two sentences in the paragraph that help explain why solar power is a good alternative energy source.

All light that reaches an object must be scattered, transmitted, absorbed, or some combination of these.

When light from the ___________ reaches a clear window, some of the light is reflected of the smooth glass.

We learned that the colored water heated up more than the clear water because it absorbed more ____________.

All light that reaches an object must be scattered, transmitted, absorbed, or some combination of these.

The more light that has one thing happen to it (reflection,

transmission, or absorption), the less light will be left for the other things to happen.

A good solar cell must absorb a lot of light because solar cells use light to make something happen and light must be absorbed to make something happen.

Good solar cells reflect a small amount of light because light that is reflected cannot be absorbed.

A good solar cell must absorb a lot of light because solar cells use light to make something happen and light must be absorbed to make something happen.

Good solar cells reflect a small amount of light because light that is reflected cannot be absorbed.

Solar energy can be used to heat water, generate electricity, move things, or even make living things grow.

Solar energy is an excellent energy resource.

An object that is FAR from the light source makes a __________________.

___________ materials do not allow light waves to pass through.

What is being shown here.

What is being shown here?

What is happening here

Sunglasses are a _______ material.

There are things wrong with the shadow of the person in the picture.  Select which of the following is wrong.

Which object can stop light waves from moving through it?