1. Starter Activity-data response
Starter activity to test learning and application from last lesson
Describe the link between soil and plants
What drives the ecosystem?

2. What factors determine the distribution of ecosystems?
Today we are learning to……
Define the term distribution
Identify key factors that control location.

3. What does distribution mean ?
THINK
PAIR
SHARE
2 Mins to establish if they already know/recognise this term. They can then write the definition in their books.
This is how things are spread out. In this case it is how ecosystems are spread across the globe.

4. Describe the distribution of tropical rainforests..
Look for patterns
Use scale (hemisphere/continents/countries where appropriate)
Use lines of latitude/longitude
Name any anomalies (don’t fit the pattern)…
Students to use generic success criteria to establish how to complete a ‘distribution’ question.
Students to write their own attempt
Add in model answer in green after their attempt.
Tropical rainforests are found in a narrow band around the equator. The largest rainforest in in South America in Brazil and it follows the Amazon River.

5. What controls the distribution?
Slide 5 & 6 can be used as information sheets-read through with the class-to be used with slide 7

6. What controls the distribution?
Precipitation
The amount of rain or snow that falls is controlled by the pressure in our atmosphere (Atmospheric pressure) . The air pressure can be high or low. When the air pressure is HIGH the weather is settled and dry. If the air pressure is LOW it brings cloudy, wet and unsettled conditions.
At the equator the sun is very strong and creates intense heat. This cause warm air to rise and as it rises it cools and creates huge storm clouds. As the air is rising the pressure is low. However it is also mixed with rising warm air because of winds in the area called TRADE WINDS. This low and high pressure collide around the equator in a region called the INTER-TROPICAL CONVERGENCE ZONE (ITCZ).
So the ITCZ is a band of wet-weather conditions that runs right around the globe following the equator. Further away from the equator it has less impact and therefore the weather conditions are different as there is more opportunity for high pressure and better weather.
Slide 5 & 6 can be used as information sheets-read through with the class-to be used with slide 7

7. Answer in full sentences………
Quick off the mark…….
Answer in full sentences………
1). What happens to temperature the further away from the equator you move?
2). Why does this happen?
3). Why does the presence of snow and ice impact on temperatures?
4). Why is it colder the higher you are?
5). Describe the impact of the ocean on nearby land.
6). How does the North Atlantic Drift impact on temperatures?
7). What does prevailing wind mean?
8). How do prevailing winds impact on the weather?
9). What weather conditions do high/low pressure bring?
10). What is the Inter-tropical convergence zone?
11). How does the ITCZ help to control high/low
pressure?
Students to complete questions using info from slides 5 & 6

8. Teacher talk... Tell your team... 1 2 3 4
Latitude-distance from equator
Altitude &distance from the sea
Prevailing winds
Atmospheric pressure
Give a number, 1-4, to each person on your team.
Each student to take responsibility to summarise and relay info to their team members.
Summarise your topic and be ready to share with your team in 3 mins