UNIT 7 OUR ENVIRONMENT

UNIT 7 OUR ENVIRONMENT

7.1 OUR ENVIRONMENT

Our environment made up of living things and non-living thing that affect our lives.

Living thing include plants and animals

Non-living things include light, air, water, and soil.

7.2 RESOURCES FROM ENVIRONMENT

Renewable Resources

Renewable resources: can be replaced naturally by the environment or man. Some renewable resources are air, soil, and water.

-          Air

Needed for respiration

Oxygen in the air convert food into energy.

In an aquatic habitat, air is dissolved in water.

-          Soil

Soil is formed from the topmost layer in the earth

It contain water, air, and minerals.

Anchors the root of plants to the ground.

Get fertile from animal waste.

-          Water

Living thing need water to survive.

Many aquatic animals live in ponds, lakes, seas, and oceans.

Mineral in dissolved water help plants grow well.

b. Other resources

- Food

Herbivores are animals who eat plant. Carnivores eat meat. Omnivores eat both plant and meat.

Predator hunt and feed other animal. Prey is the animal haunted by predator.

- Fuels

Fuels such as wood burned to produce heat and energy.

Fossil fuels such as coal, oil, and, natural gas, formed from dead organism buried under layers of earth for thousand years. Coal burned in power stations to produce electricity. Oil and gas is pumped from the ground. Oil refineries is used to processed oil into petrol, diesel, and fuel for aero planes.

- Building materials

Some of building material are wood, metals, clay, sand, and mud. Wood is used to build house and furniture. Metal such aluminum is extracted from the rocks. Alloy is a stronger substance made from the mix of pure metal and other metal or non-metal.

Mountains, oceans, and rain forest are example of natural environment that has aesthetic values. People visit natural environment to take in their beauty or enjoy interaction with nature.

7.3 DIFFERENT TYPE OF ENVIRONMENT

Environment
Organism
Description

Body of water (ponds, rivers, ocean)
- Aquatic animals
Take oxygen dissolved in water

Land
- Land animal
Take gaseous oxygen from the air

Abundant sunlight
- Plants
- animals
- Need sunlight to make food.
- keep their body warm

Dark places
- Bats
- woodlice
- stay in cave during the day, take food at night
- Sensitive to light, found under rotting leaves and dead tree bark.

Desert
- camel
- needle grass
- High temperatures, very little rainfall.
- can drink more than 100 liters water
- has long root to reach deep underground water

North and south pole
- polar bears
- seals
- cold all year round
- have a thick layer of hair or fur.
- a layer of fat keep them warm

Environment	Organism	Description
Body of water (ponds, rivers, ocean)	- Aquatic animals	Take oxygen dissolved in water
Land	- Land animal	Take gaseous oxygen from the air
Abundant sunlight	- Plants - animals	- Need sunlight to make food. - keep their body warm
Dark places	- Bats - woodlice	- stay in cave during the day, take food at night - Sensitive to light, found under rotting leaves and dead tree bark.
Desert	- camel - needle grass	- High temperatures, very little rainfall. - can drink more than 100 liters water - has long root to reach deep underground water
North and south pole	- polar bears - seals	- cold all year round - have a thick layer of hair or fur. - a layer of fat keep them warm