1. Unit 1 Life Science: Sustaining Ecosystems Review Soil conclusion
Challenge!

2. Soil p.46 Soil is a very important part of land ecosystems. Why?
Determines what types of plants will grow in an area.
What it's made up of
How much is there
The plants determine the animals as well!
Soil is important in determining the ecosystem

3. Are all soils the same?

4. No!

5. Soil Soil is made up of several layers:
 1. Topsoil- A dark fertile layer that contains small 
rocks and decaying organic matter called humus.
 This layer contains lots of nutrients, oxygen and 
water and is good for growing plants.
 2. Subsoil – Found below the topsoil.
 It is a lighter colour, has fewer nutrients, and 
larger pieces of rock.
 3. Bedrock – Solid rock found below soil.

7. The Formation of Soil p.46-47
All soil begins as solid rock.
Over time it is broken down into smaller pieces 
by weathering.
Weathering – When rock is broken down by 
rain, wind, frost and snow.

8. The Formation of Soil p.46-47
When rocks are broken up, plants can move in and use the nutrients released.
When these plants die and decay, humus begins to build up.
Overtime, topsoil will form.

9. Soil and Water Water in soil is very important for plants
Depending on what the soil is made up of it can either hold water or lose water
Percolation: When water moves through the soil it moves down until it reaches ground water.
What makes up the soil can change the amount of percolation

10. Soil and pH pH tells us the acidity of the soil Low pH is acidic
High pH is Alkaline (basic)
Different plants grow in different pH
Newfoundland has very acidic soil
we put lime (a base) on our soil to grow grass

11. Worksheets!

12. Selecting the right soil
Core Lab!
Prepare for lab next day:
Read pg

13. Conclusions?
Nitrogen cycle, eutropication, bioms, lab 2 - soil

14. Which biome will have the most biodiversity? 
Why?