1. Extinction Reflective Learner Self Manager Effective Participator
L.O: Understand how organisms can become extinct
Grade 4: Describe what is meant by extinction & describe one way that an animal could become extinct.
Grade 6: Describe how other organisms can cause an animal or plant to become extinct. Suggest a hypothesis for why an organism became extinct.
Grade 8: Suggest alternative hypotheses for why an organism became extinct. Evaluate in detail the need to conserve endangered plants. Apply knowledge of speciation to explain why dodos were only found on one island.
Reflective
Learner
Self
Manager
Effective
Participator
Independent
Enquirer

2. Scientists estimate that 4billion species have existed on Earth
Scientists estimate that 4billion species have existed on Earth. How many species do you think are still around today?
THINK PAIR SHARE

3. Scientists estimate that 4 billion species have existed on Earth
Scientists estimate that 4 billion species have existed on Earth. How many species do you think are still around today?
8.7 million

4. Sabre-toothed tigers and mammoths
Extinct Species
Sabre-toothed tigers and mammoths
“Extinction” is when every member of a species dies out. Some examples:
Dodo
21/04/2019

5. What could cause a species to become extinct?
THINK PAIR SHARE

6. Task 1
Use pages 244 – 247 from Biology AQA book to help you.
Grade 4: Copy and complete the paragraph on the ‘Extinction’ fill in the gaps & give examples of animals that have become extinct due to other organisms
Grade 6: As grade 4 and describe one hypothesis about how the dinosaurs became extinct
Grade 8: Stick in/copy the summary sheet and describe two hypotheses about how the dinosaurs became extinct

7. Extinction
Words to use: deforestation, competition, dinosaurs, human, environment
Extinction can happen due to an organism’s inability to adapt and die because of:
Increased _______
New predators
Changes in the _________
New diseases
Alternatively, a “mass extinction event” can happen, for example the extinction of the __________.
In modern days animals are in danger due to _____ activity, e.g. pollution, hunting, __________ etc…
Oh no…
21/04/2019

8. Extinction Summary Write this down, or glue in your own copy
Dodo

9. Self asses your answers using the mark scheme and your pink pen.
Task 2
Grade 4: Complete the low or mid level exam question
Grade 6: Complete the mid or high level exam question
Grade 8: Complete the high level exam question
Reflective
Learner
Self asses your answers using the mark scheme and your pink pen.

10. Extinction Reflective Learner Self Manager Effective Participator
L.O: Understand how organisms can become extinct
Grade 4: Describe what is meant by extinction & describe one way that an animal could become extinct.
Grade 6: Describe how other organisms can cause an animal or plant to become extinct. Suggest a hypothesis for why an organism became extinct.
Grade 8: Suggest alternative hypotheses for why an organism became extinct. Evaluate in detail the need to conserve endangered plants. Apply knowledge of speciation to explain why dodos were only found on one island.
Reflective
Learner
Self
Manager
Effective
Participator
Independent
Enquirer