energy

Which of these energy sources come from inside the earth's crust?

• oil

• coal

• solar

• gas

Click all of the things that are non-renewable energy sources.

• oil

• gas

• coal

• water

Select the following Pros (Advantages) of using Wind Energy:

• Renewable

• It's a Green Energy

• Noise

• How they look

Which type of lens would make a good hand lens?

• concave lens

• convex lens

• plane lens

• prism

Scientists use telescopes to make distant objects appear closer. Some parts of a telescope are shown below. Which of the following best describes how the object lens of this telescope helps scientists observe the moon?

• The object lens produces light.

• The objective lens blocks light.

• The objective lens reflects light.

• The objective lens refracts light.

When light hits an object, the rays can pass through it, bounce off it, or be absorbed by it. Light rays that bounce back are –

• radiant

• reflected

• refracted

• rubber

The act or process of changing position and/or direction

• Energy

• Motion

• Mechanical Energy

• Speed

Why does cupping your hands around your mouth when you shout make the sound travel further?

• The sound spreads out.

• Your voice gets louder.

• Your voice becomes muffled.

• The sound doesn't spread as much.

All of these are examples of refraction except...

• rainbow

• glass of water

• prism

• bird in mirror

When light passes through water, it changes direction. This is called—

• insulation

• reflection

• refraction

• transpiration