Science 4

It refers to anything that has mass and occupies space.

• Mass

• Matter

• Density

• Volume

It refers to how light or heavy the object is.

• Mass

• Volume

• Density

• Matter

What do you mean by 3R's concept?

• Composting so it will become a good fertilizer.

• Applying recycling method to save the earth.

• Applying the method of reducing, reusing and recycling.

• Applying the method of composting and recycling.

A process when solid state changes to gas state.

• Evaporation

• Condensation

• Sublimation

• Deposition

What do you mean by the term biodegradable?

• materials that won't rot

• materials that will decay

• some materials may rot, some may not

• none of the above

Which is not an effect of a decaying material?

• It attracts disease-carrying insects.

• It emits unpleasant smell.

• It fills up landfills.

• It can cause food poisoning if consumed.

Which is the best way to dispose of biodegradable materials?

• composting

• reusing

• reducing

• recycling

What will happen to the materials when heated?

• contract

• expand

• melt

• none of the above

What will happen to the materials when they are cooled?

• contract

• expand

• all of the above

Rusting of iron is an example of _____________.

• physical change

• chemical change