Practice Worksheet-UCHK#2 Y4- Term 2-23-2024

How does light move?

• zig-zag
• back and forth
• up and down
• straight line

Light a form of

• energy
• raibow
• gas
• matter

The arrows of ray diagram shows the _________________ of the light.

• mass
• direction
• brightness
• speed

We can __________ the objects if light source is present.

• hear
• smell
• see
• taste

Energy is ____________

• the temperature outside.
• when something moves.
• the ability to do work
• does not exist in our daily lives.

What form of energy does a lamp produce?

• light
• heat
• sound
• none of them

The Sun produces__________

• light and heat energy
• sound and light energy
• heat and sound energy
• electrical and light energy

Energy can not be _____ or destroyed. Energy can only be ________

• made, Transformed
• Transformed, Created

Energy that flows from hotter object to a cooler object is called __________

• light energy
• sound energy
• heat energy
• electrical energy

In which example energy is transferred to the surrounding environment as sound?

• turning on a lamp
• pressing a door bell
• making noodles
• none of these