SCIENCE REVIEW Q4 Grade 4

1. The energy that we use comes from sources of energy. The main source of energy is ….

• the sun

• the stars

• the earth

• the moon

Energy from the sun is also called as solar energy. It consists of ….

• electrical and heat energy

• chemical potential energy

• light and heat energy

• light and sound energy

Alternative sources of energy are shown by ….

• A-B-C

• A-C-E 

• B-C-D

• C-D-E

The sources of chemical potential energy are shown by .…

• A and B

• B and C

• C and D

• D and E

The sources of energy shown in the table are all renewable, except ….

• running water

• fossil fuels

• biofuels

• wind

One of alternative sources of energy is geothermal energy. It comes from .…

• running water

• within the earth

• the center of an atom

• carbon dioxide and oxygen

Some things can give out light directly. The terminology for those things are ….

• light sources

• reflecting part

• retina

• sunrays

Imagine we are in a room with one light bulb on. In that room, there are chairs, a table and some books. We can see those things because the light from the light bulb is ….

• bouncing to random direction

• blocked by certain objects

• bright enough to distribute

• reflected into our eyes

The objects that light completely can pass though are shown by number ….

• 1 and 3

• 2 and 4 

• 1 and 2

• 1 and 4

An opaque object is shown by number ….

• 1

• 2

• 3

• 4