Light and shadow 2

Which of the following groups consist of light sources only?

• Sun, burning candle, moon

• Sun,star, lightning

• firefly, glow worm, moth

• Earth, mirror and ceiling lamp

Rescuers are looking for two missing children during rainy night. Which of the following source of light is the most suitable for the rescue?

• candle

• torchlight

• handphone

• fire torch

Ryan is in his house and looking outside at the garden as shown below.

Which of the following best explains why Ryan is able to see the garden?

• The glass reflects the light

• The light that falls on the garden is reflected

• The glass does not allow the light to pass through

• The light from Ryan's eyes falls onto the garden

The boy is able to see the ball. Which of the following correctly shows the path of light that makes it possible for the boy to see the ball?

• from basketball to lamp to boy

• from boy to lamp to basketball

• from lamp to ball to basketball

• from lamp to basketball to boy

Based on the picture above, what materials are used to make block A and block B?

• Block A: wood; Block B : clear glass

• Block A: clear glass; Block B :wood

• Block A: frosted glass; Block B :wood

• Block A: wood; Block B :frosted glass

How can you make the shadow of the ball bigger on the screen?

• Move the ball nearer to the screen

• Move the screen nearer to the ball

• Move the light source further from the ball

• Move the lamp nearer to the ball

Tags

NGSS.4-PS4-2

The sun is shinning on a stick on the ground. Which shadow will be cast at around 5 p.m?

• 1

• 2

• 3

• 4

Which of the following correctly shows the four materials arranged from the most transparent to the least transparent?

• Y, X, Z, W

• W, X, Z, Y

• W, Z, X, Y

• Y, Z, X, W

Tags

NGSS.MS-PS4-2

Which of the following correctly shows the path of light when it passes through a clear flat glass?

• 
• 
• 
• 

Look at the set up above. Cindy saw the object when she was asked to stand at position X.

What was the smallest number of mirrors Cindy required to see the object.

• 3

• 4

• 5

• 8