Science CBT

What term best describes the type of environment shown in the diagram?

• aquatic

• grassland

• rainforest

• wetland

NSWMA has suggested that portions of the waste that can decompose should be composted.

What percentage of the waste should be composted?

• 16%

• 37%

• 53%

• 47%

Which type of hot water system contributes least to global warming?

• electrical

• coal

• solar

• wood

Which TWO activities would likely be responsible for the changes seen in the coral reefs after 20 years?

• coastal development / construction

• improper dumping of garbage

• over-fishing

• slash and burn

Which statement best describes how shadows form?

Shadows form when __________________

• The light is turned off.

• The light path is blocked by an object.

• Light shines through an object?

• Light reflects off an object.

The arrow shows the light ray from a flashlight shined onto a mirror.

In which direction will the light ray most likely go after it hits the mirror?

• 
• 
• 
• 

Which TWO light rays best explains how the boy is able to see the horse?

• Ray 1

• Ray 2

• Ray 3

• Ray 4

A student is investigating the formation of shadows using the apparatus set up. The student makes the following statement:

‘As the light moved closer the shadow got bigger’.

This type of statement is most likely ____________

• a conclusion

• a method

• an observation

• a prediction

Which statement is true?

• The piano key C1 has the shortest string

• The piano key C2 has the longest string

• The shorter the string, the higher the pitch of the sound

• The longer the string, the higher the pitch of the sound

Droplets of water formed on a window near a pot of hot water.

What best explains why droplets formed on the window? The window is.....

• transparent

• smooth

• hard

• cold