SCIENCE YEAR 4 CHAPTER 5

What are the properties of light?

• Light travels in a straight line

• Light can be reflected

• We can see in darkness

• Light cannot be refracted

Light is bent when it enters into a medium with different density

• True
• False

Answer explanation

Light will be refracted when it enters a medium that is different in density

How many colors does a rainbow has?

• 3

• 5

• 7

• 8

Answer explanation

There are 7 colors in rainbow: Violet, Indigo, Blue, Green, Yellow, Orange, and Red

What is the importance of light in daily life?

• To see objects

• To make a shady place (shadows) to rest when it is hot

• To save the house from flood

• To control the level humanity

We use light refraction to see our image in mirror

• True
• False

Answer explanation

Light reflection helps to see our image reflect from the mirror to eyes

What are the examples of opaque objects?

• Wood

• Air

• Water

• Iron

Answer explanation

Opaque objects do not let light pass through it

Can a prism create rainbows?

• Yes

• No

Answer explanation

A prism creates a rainbow by bending and splitting white light into different colors through a process calles refraction

What happen to the shadow if the torch light is placed near an object?

• The shadow will disappear

• The shadow will become bigger and darker

• The shadow will become small

• The shadow will become larger

Answer explanation

The size of the shadow becomes larger if the distance between the light source and the object is shorter

The size of shadow will become small if the light source is placed at right side of the object

• True
• False

Answer explanation

The shadow will be the long and big if the position of the light source is on left/right

Light travels in circle line

• True
• False

Answer explanation

Light always travel in straight line