Light source that is made by human is called man-made light source.

Traffic light is a ... light source.

What things formed formed this shadow?

An area of darkness which is formed when the light is blocked is called ...

Which of these things are man-made light source?

Things can form a shadow of different sizes and shapes.

Which of these things are light sources?

The moon and the mirror are not light source.

Our main light source in the day is ....

Where can you find rocks?

Which rock that hard and has large grains?

Limestone is a stone that contains ....

Which rocks that made up of layers of grains?

Which of these things is made of rock?

Marble are rocks that have nice patterns and colours.

Silk and wool are natural materials that come from ....

Cotton are made from ....

Which of these things are man-made materials?

Paper, plastic ceramic are natural materials.

Which of these picture example of stretching?

Which of these things that can be stretched?

Things that can return to their original shape after being stretched are ....

This people is ... a drink can.

Which of these things are made by twisted?

When a chocolate is heated, it can change into a liquid. This process is called ....

Water becomes cold when its is ....

Steam is another state of water. It is a gas.

Which of these things are soluble in water?

Which of these things that cannot dissolve in water?