Review Conserving Earth's Resources

non living thing, made of elements

• rocks

• leaves

• minerals

• plants

The minerals that are rare and beautiful are called:

• crystals

• jewerly

• fancy rocks

• gems

Examples of minerals are:

• igenous and metamorphics

• diamonds and gold

• ceramic and cement

• marble and granite

What is the layer that protects humans and animals of Sun's harmful rays?

• stratosphere

• troposhere

• mesosphere

• ozone

Resources cannot be replaced easily

• water

• renewable

• non - renewable

• plants

Pollution is caused by:

• humans and factories

• animals

• plants

• organic matter

Resources that can be replaced easily:

• rocks

• non renewable

• renewable

• minerals

Examples of non-renewable resources are:

• water and sun

• oil and natural gas

• soil and plants

• wind

Means use to less of something

• reduce

• reuse

• recycle

• remove

The three R's are:

• remove, remake and recover

• recall, reflect and reverse

• reduce, reuse and recycle

• relieve, refold and relate