Lesson 11 Quiz - Review

What causes a shadow?

• When the sun is behind you, your shadow is in front of you.

• We see the gray in a shadow when there is a low light source

• Shadows are made when a solid object blocks light but the light rays surrounding the object continue and bounce from a surface to your eyes.

How do we see color? Select all that apply.

• Whatever color of light that an object absorbs, that is the color we see.

• A yellow banana will absorb all of the colors of light except yellow. It reflects the color yellow.

• A colored object scatters some colors of light and absorbs all the other colors of light.

• Our eyes have three kinds of cone cells sensitive to green, blue, and red light.

What conditions are needed in order to see an object? How do we know?

• The light box investigation showed us we need a clear path to see an object.

• The 4 conditions to see an object are: a light source, a clear path, an object, and eyes.

• The light box investigation showed us we need a light source to see an object.

• We experimented with light boxes and found objects around the room to understand that in order to see an object we need a light source, a clear path, an object, and eyes.

Why does the sunlight feel warm? Select the most complete answer.

• When an object, including our skin, absorbs light, some of the light energy gets transformed into heat and objects feel warm.

• When light gets reflected from an object, it leaves a lot of warmth behind

• As light is scattered by an object it leaves some warmth behind.

• As light is transmitted through an object it causes the object to heat up.

How does light behave when it hits an object?

• In a mirror, light can get scattered in various directions so you can see yourself.

• Depending on the material of an object, light can be transmitted through the object, absorbed by the object, or reflected and scattered away from the object.

• When light hits an object it passes straight through the object.

• When light hits an object it gets absorbed and sometimes it gets reflected back.

An experience of seeming to see something which does not exist or is other than it appears.

• Modeling

• Consensus

• Optical illusion

• Light path

A representation of a system of ideas, events or processes in science.

• Object

• Optical illusion

• Shadow

• Model