Exploring Materials Around Us

What are natural resources?

• Natural resources are only man-made products.

• Natural resources are exclusively found in urban areas.

• Natural resources are materials or substances found in nature that can be utilized for economic benefit or to sustain life.

• Natural resources are items that cannot be used for any purpose.

Name three examples of natural resources.

• Water, forests, minerals

• Plastic, glass, steel

• Coal, oil, gas

• Air, sunlight, soil

What is recycling?

• Recycling is the method of storing waste in landfills.

• Recycling is the act of throwing away trash.

• Recycling is the process of converting waste materials into new products.

• Recycling is the process of burning waste materials.

Why is recycling important?

• Recycling is only important for businesses.

• Recycling has no impact on energy consumption.

• Recycling is important because it conserves resources, saves energy, reduces pollution, and minimizes waste.

• Recycling increases the amount of waste produced.

What are the properties of solids?

• Definite shape but no volume

• The properties of solids include definite shape, definite volume, incompressibility, closely packed particles, and strong intermolecular forces.

• Particles are loosely packed

• Weak intermolecular forces

Can you name a solid material?

• Steel

• Air

• Water

• Wood

What are the three states of matter?

• gas, liquid, crystal

• solid, liquid, gas

• solid, liquid, plasma

• plasma, vapor, foam

What state of matter is water in when it freezes?

• plasma

• liquid

• solid

• gas

What does biodegradable mean?

• Biodegradable refers to materials that are synthetic and non-decomposable.

• Biodegradable means capable of being decomposed by biological agents, especially bacteria.

• Biodegradable means that a substance is harmful to the environment.

• Biodegradable means resistant to decay and lasts indefinitely.

Can you give an example of a biodegradable material?

• Polylactic acid (PLA)

• Styrofoam

• Polyethylene

• Glass