Tree is one of the natural resources.

We CANNOT use timber as raw material to make furniture.

A renewable resource is one that is replaced by the natural process in less time than an average human life.

Tree is a renewable resource because it can be replanted within human lifespan.

A resource that cannot be replaced naturally within human lifespan, it takes 1000 or even more to form.

Wind is a renewable resource.

Nuclear is a non-renewable resource.

Water is a renewable resource.

Oil is a renewable resource.

Solar power is a non-renewable resource.

Coal is a non-renewable resource.

Fragile layer of gases surrounded the outer layer of Earth.

Rocks / ground / crust / landforms on the Earth

Water on the Earth, ie: ocean, sea, lake, river

living things on the Earth, ie: animals / plants / human / forests

Rocks form under the sea

Rocks form by volcanic eruptions

Rocks form by two groups of rocks under great heat and pressure

Marble is a metamorphic rock that is commonly found in people’s houses.

Gold is a metamorphic rock that is commonly found in people’s houses, Gold Table

Slate is a metamorphic rock that is commonly found in people’s houses, ie: roof.

A process will cause rocks to break and change into different pieces or shapes.

Freeze-thaw ice, wind and water that cause rocks to break and change into different pieces.

Acid rain that cause rocks to break and change into different pieces.

Big tree falling down to cause rocks to break and change into different pieces.

Soil is alive with organisms.

Soil takes a very long time to form—up to hundreds of millions of years. So, soil is a ______ resource.

An insect can aerate in soil to allow air circulation for the plant, what is that insect?

Biome of polar bears are located in polar regions, such as Antarctica and Arctic.

A warm and humid climate, close to the equator; 75% of the world's plants live here.

Rearrange the layers in a rainforest from lowest to tallest:

1) Canopy

2) Emergent

3) Forest Floor

4) Understory

Rainforest can stabilize the climate of Earth because Tree absorb ___ and release ___.

Formation of clouds; the process when water vapour in atmosphere changes into liquid water

water released from clouds in the form of rain, freezing rain, sleet, snow, or hail

the process when liquid water changes to water vapour

when plants take up liquid water from the soil and release water vapour into the atmosphere from their leaves

97% of the Earth's water comes from oceans, lakes, and rivers

2.5% of the Earth's water is mostly frozen in glaciers and polar ice caps

Coal, oil and natural gas are ____ formed from dead animals 300 million years ago.

Formation of oil and gas:

The dead _______ were buried under the dirt and in the water 100 million years ago.

Coal is _____ part of fossil fuel and formed by dead _____

Oil is _____ part of fossil fuel and formed by dead _____

Natural gas is _____ part of fossil fuel and formed by dead _____