Extinction L O Understand how organisms can become

Extinction 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.

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

Scientists estimate that 4 billion species have existed on Earth. How many species do you think are still around today? 8. 7 million

Extinct Species “Extinction” is when every member of a species dies out. Some examples: Sabre-toothed tigers and mammoths 25/12/2021 Dodo

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

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

Extinction can happen due to an organism’s inability to adapt and die because of: • • Increased _______ New predators Changes in the _____ New diseases Extinction Oh no… 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… Words to use: deforestation, competition, dinosaurs, human, environment 25/12/2021

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

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 Self asses your answers using the mark scheme and your pink pen.

Extinction 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.