Natural Sciences Grade 7 Term 1 Life and

Topic 1 The Biosphere The concept of the biosphere (Part 1) Gr 7 Natural

The Earth Look at the picture of the Earth. . . What do you

The biosphere • It is a group of layers where life exists on Earth.

The biosphere is made up of the following 3 systems L = Lithosphere A

The systems of the Earth Lithosphere A thin layer of soil and rocks on

The systems of the Earth Atmosphere A thin layer of gases that surrounds the

The systems of the Earth Hydrosphere • All the water found on Earth. •

The Biosphere Gr 7 Natural Sciences – Term 1, Topic 1

The Biosphere is all about life Living things that are found in the biosphere:

Living things in the Lithosphere. . . Spot the image that is out of

Living things in the Hydrosphere. . . Spot the image that is out of

Living things in the Atmosphere. . . Spot the image that is out of

Can you name each system? 1) 2) 3) 4) Gr 7 Natural Sciences –

The Biosphere also contains dead organic matter • Dead plants and animals that have

Ecosystems • The biosphere can be divided into smaller units called ecosystems. • Ecosystems

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Natural Sciences Grade 7 Term 1: Life and Living The biosphere (PPT 2)

Topic 1 The Biosphere The concept of the biosphere (Part 1) Gr 7 Natural Sciences – Term 1, Topic 1

The Earth Look at the picture of the Earth. . . What do you see? water Is there something else that you cannot see? Gr 7 Natural Sciences – Term 1, Topic 1 land

The biosphere • It is a group of layers where life exists on Earth. • Bio = Life / sphere = shape of the Earth. • Each sphere of the biosphere contains different kinds of living things, including plants, animals and micro-organisms. Gr 7 Natural Sciences – Term 1, Topic 1

The biosphere is made up of the following 3 systems L = Lithosphere A = Atmosphere H = Hydrosphere Gr 7 Natural Sciences – Term 1, Topic 1

The systems of the Earth Lithosphere A thin layer of soil and rocks on the crust and the seabed of the Earth. Gr 7 Natural Sciences – Term 1, Topic 1

The systems of the Earth Atmosphere A thin layer of gases that surrounds the Earth and which can sustain life. Gr 7 Natural Sciences – Term 1, Topic 1

The systems of the Earth Hydrosphere • All the water found on Earth. • It includes lakes, rivers, oceans and underground water. Gr 7 Natural Sciences – Term 1, Topic 1

The Biosphere Gr 7 Natural Sciences – Term 1, Topic 1

The Biosphere is all about life Living things that are found in the biosphere: 1) Lithosphere • Plants • Animals • Micro-organisms in the soil Gr 7 Natural Sciences – Term 1, Topic 1

Living things in the Lithosphere. . . Spot the image that is out of place. Gr 7 Natural Sciences – Term 1, Topic 1

The Biosphere is all about life Living things that are found in the biosphere: 2) Hydrosphere • Plants • Animals • Micro-organisms Gr 7 Natural Sciences – Term 1, Topic 1

Living things in the Hydrosphere. . . Spot the image that is out of place. Gr 7 Natural Sciences – Term 1, Topic 1

The Biosphere is all about life Living things that are found in the biosphere: 3) Atmosphere • Animals • Micro-organisms Gr 7 Natural. Sciences- Grade – Term 71, Topic 1

Living things in the Atmosphere. . . Spot the image that is out of place. Gr 7 Natural Sciences – Term 1, Topic 1

Can you name each system? 1) 2) 3) 4) Gr 7 Natural Sciences – Term 1, Topic 1

The Biosphere also contains dead organic matter • Dead plants and animals that have begun to rot or decay. • Decomposers (such as fungi & bacteria) feed on the organic matter and help break it down. • Nutrients in the dead plants and animals are returned to the ecosystem. Gr 7 Natural Sciences – Term 1, Topic 1

Ecosystems • The biosphere can be divided into smaller units called ecosystems. • Ecosystems can be big or small and include all the living things in a particular place, which interact with the living and non-living environments. Gr 7 Natural Sciences – Term 1, Topic 1

Gr 7 Natural Sciences – Term 1, Topic 1