Shadow

Light intensity is ___________.

• a measure of the amount of light in an area

• a measure of the length of light on the ground

• a measure of the weight of light in an area

The light can completely go through ____________ materials.

• opaque

• translucent

• transparent

• sunglasses

sunglasses are made of ________________ material, which allows some light go through.

Which colors are absorbed by the green leaf?

• green

• blue

• yellow

• red

When the light is blocked, a ______________ formed.

Choose the correct ANSWERS.

What affect the size of a shadow?

• size of the object

• light intensity

• position of the object

What are they?

• light sources

• silhouettes

• Shadow puppets

• transparent object

What is sundial used for?

• to show the time.

• to show the light intensity.

• One type of shadow puppet.

• to measure the length of shadow

Why can we tell the time using the shadow stick or sundial?

Because the shadow___________________________ through the day.

• doesn't change.

• changes in length and position.

• changes in length and doesn't change in position

• changes in position and doesn't change length

How is light intensity measured?

• by sundial

• by light meter

• by stick shadow

• by shadow shades