What is the main focus of today's lesson?

• The history of mathematics

• Special properties of matter

• The lifecycle of plants

• Basic principles of physics

Which material is likely to absorb water?

• Plastic bag

• Metal spoon

• Frying pan

• Tissue paper

Which of the following materials will float in water?

• Plastic bag

• Iron nail

• Metal fork

• Frying pan

What is porosity?

• The property of a material to emit sound

• The ability to reflect light

• The property of a material to absorb liquid

• The ability to conduct electricity

Which of these materials is non-porous?

• Towel

• Plastic cup

• Cotton

• Sponge

What determines if an object will sink or float in water?

• Its temperature

• Its color

• Its density

• Its shape

Which material is denser than water and will sink?

• Styrofoam cup

• Plastic bottle

• Feather

• Big stone

What kind of materials enable boats to float?

• Solid rocks

• Heavy metals

• Materials less dense than water

• Materials denser than water

Which property is common among coins, spoons, and iron?

• Lightweight

• Less dense than water

• Denser than water

• Porous

Which material is most likely to undergo decay?

• Plastic cups

• Water

• Leftover foods

• Aluminum