LIGHT

LIGHT

SCIENCE 4

Let us rejoice because He came to bring life and light to this dark world.

Can light bend around corners?

Name shapes that has corners.

How to solve the perimeter of a rectangle and square?

PERIMETER OF A SQUARE

Find an unknown side of a rectangle or square with known perimeter.

https://www.youtube.com/watch?v=UyLTqfbhicw

Multiple Choice

The perimeter of a chocolate bar is 40 cm. Its length is 12 cm. What is its breadth.

• 16 cm

• 8 cm

• 4 cm

• 28 cm

Multiple Choice

The perimeter of a square room is 28 m. Find the length of its side.

• 28 m

• 8 m

• 7 m

• 14 m

Multiple Choice

How do light rays travel through a translucent substance?

• The light rays can not pass through the object.

• The light rays can pass through the object.

• Some light rays can pass through the object.

Multiple Choice

Lava is an example of ________.

• Non luminous light

• Natural luminous light

• Man made luminous light

Multiple Choice

Bon fire is an example of a/an _________.

• Non luminous light source

• Man made luminous light source

• Natural luminous light source

THE POWER OF LIGHT

Let us watch this video:

https://www.youtube.com/watch?v=1ReuOnKSi0s

Estimate the time using shadows

Early in the morning and late in the afternoon, the sun shines from low in the sky. When you stand outside at those times, your body causes a long shadow.

Multiple Choice

Express the time using 24-hour clock. 8:55 a.m.

• 08:55

• 16:55

• 17:00

Multiple Choice

Express the time using 24-hour clock.

5:20 p.m.

• 17:20

• 16:20

• 15:20

Multiple Choice

Express the time using the 12-hour clock.

05:40

• 17:40 p.m

• 5:40 a.m

• 16:40 a.m

• 5:40 pm

Multiple Choice

Express the time using 12-hour clock.

19:35

• 7:35 a.m

• 19:35 p.m.

• 7:35 p.m.