SCIENCE CHAPTER 6 AND 7 ENERGY AND PROPERTIES OF LIGHT

Energy can be made, lost, or destroyed

• true

• false

Energy can be tranferred from one object to another only. But it can not be transferred to the surronding environment.

• true

• false

The only type of energy we can see is light

• true

• false

The picture shows solar panels on the roof of a house

solar panels are used to heat the house's water

complete the sentence. use the following words.

​ (a)   from the​ (b)   is transferred to the solar panels.

The energy is then transferred to the water as ​ (c)  

• light
• sun
• heat

light travels in . . . lines

Look at the diagram

Key says he can see the candle flame through the tube

He is incorrect. Why? Explain.

Three students wrote notes about properties of light.

Adam : Light travels in the same direction after reflected

Nuh : We can see objects because they are light sources

Yusuf : We need light to see

Only one stuudents is correct. Tick the name of the students who is correct

• Nuh

• Yusuf

• Adam

Object X is not a source of light

How can we see object X?

• it reflects light

• it gives off light

• it absorbs light

In which examples is the energy transferred to the surrounding environment as sound? tick the two correct answer

• Strumming a guitar

• turning on a lamp

• pressing a doorbell

Which objects are sources of light?

Tick the four correct answer ​ (a)   ​ (b)   ​ (c)   ​ ​ (d)   l

• the sun
• burning firewood
• trumpet
• lit candle
• lit torch
• kettle