What is a sustainable resource?

one that is replaced as fast as it is used. It will not run out.

Which helps to conserve fish stocks?

setting quotas on how many fish can be caught. Limits allow the fish to breed.

What is a seed bank for?

storing seeds to conserve plant species. The seeds can be grown if the species dies out in the wild.

Which is a cause of species becoming endangered?

habitat destruction. With nowhere to live, a population falls.

What is a captive breeding programme?

breeding endangered animals in zoos to increase their numbers. Some are later released into the wild.

Conservation · Cambridge IGCSE Biology (9

In plain words

Use up a forest faster than it grows and one day there's no forest. Conservation is about using what nature provides without running it down, and about stopping species disappearing for good.

Three things to know

A sustainable resource is one that is produced as fast as it is removed, so it does not run out. Forests can be conserved by replanting, protected areas and education; fish stocks by quotas, limits on net size and closed seasons.
Species become endangered through habitat destruction, hunting, pollution, climate change and introduced species.
Endangered species can be conserved by monitoring and protecting them and their habitats, by education, by captive breeding programmes, and by seed banks.

Tips and tricks

Sustainable means it can go on indefinitely: taken no faster than it is replaced.
Reasons to conserve: keeping biodiversity, protecting ecosystems that provide food, medicines and fuel, and because extinction can't be undone.

5 questions, about 2 minutes.

It lands in your notebook with its questions as flashcards.

Conservation: 5 questions and answers

These are the quiz’s questions. Do the quiz first, then come back here for the ones that got you.

What is a sustainable resource?
- one that never existed
- one that is replaced as fast as it is used (the answer)
- one that is used up quickly
- one made of plastic
It will not run out.
Which helps to conserve fish stocks?
- using nets with smaller holes
- setting quotas on how many fish can be caught (the answer)
- fishing all year round
- catching young fish
Limits allow the fish to breed.
What is a seed bank for?
- growing crops for sale
- storing seeds to conserve plant species (the answer)
- feeding birds
- making fertiliser
The seeds can be grown if the species dies out in the wild.
Which is a cause of species becoming endangered?
- protected areas
- captive breeding
- habitat destruction (the answer)
- education
With nowhere to live, a population falls.
What is a captive breeding programme?
- hunting animals for zoos
- breeding endangered animals in zoos to increase their numbers (the answer)
- releasing pets into the wild
- selling rare animals
Some are later released into the wild.

5 questions

Tap an answer and you’ll see straight away whether it’s right, and why.

Worksheet

3 questions, 8 marks. Write your answers on paper, then check them.

Conservation

Cambridge IGCSE Biology (9–1) 0970 · 8 marks · papermunch.org

Name ______________________________ Date ______________

State what is meant by a sustainable resource.[2]
Show answerHide answer
One that is produced as rapidly as it is removed from the environment, so that it does not run out.
I got this one
Describe three ways in which fish stocks can be conserved.[3]
Show answerHide answer
Any three: quotas limiting the catch; controlling net (mesh) size so young fish escape; closed seasons or protected areas; education; restocking.
I got this one
Give three reasons why a species may become endangered.[3]
Show answerHide answer
Any three: destruction of its habitat; hunting; overharvesting; pollution; climate change; introduced species.
I got this one

Answers: Conservation

1. One that is produced as rapidly as it is removed from the environment, so that it does not run out.
2. Any three: quotas limiting the catch; controlling net (mesh) size so young fish escape; closed seasons or protected areas; education; restocking.
3. Any three: destruction of its habitat; hunting; overharvesting; pollution; climate change; introduced species.