Starter quiz
- A ______ is an organism that eats other organisms to get the food that they need to survive.
- 'consumer' ✓
- An insect is an organism with how many pairs of legs?
- 1
- 2
- 3 ✓
- 4
- 5
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- Which statements are correct?
- Producers make food using light and chemicals from their surroundings. ✓
- Producers depend on other organisms to get the food that they need to survive.
- Consumers depend on producers to get the food that they need to survive. ✓
- Consumers are able to make their own food.
-
Look at the food chain diagram. What is the name of the organism that the mole eats?- Leaves
- Worm ✓
- Owl
-
- A habitat provides organisms with three things. These are food, ______ and a place to reproduce.
- 'shelter' ✓
Look at this food chain from the sea. What will happen if all of the copepods die?- The number of arrow-worms will decrease ✓
- The number of arrow-worms will increase
- The number of plankton will decrease
- The number of herring will stay the same
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Exit quiz
- Match each word to the correct definition.
- Insecticide⇔a chemical which is used to kill insects ✓
- Pesticide⇔a chemical which is used to kill pests ✓
- Herbicide⇔a chemical which is used to kill plants ✓
- Fertiliser⇔provides producers with minerals that they need to grow well ✓
- Organic⇔material which comes from a living thing ✓
- Which of the following is a reason why a farmer might use a pesticide?
- to kill organisms that cause damage to a crop ✓
- to kill bees and insects that pollinate a crop
- to kill all organisms other than the crop itself
-
Look at the food chain diagram. What would a farmer use to kill the aphids on the potato crop?- Fertiliser
- Manure
- Herbicide
- Insecticide ✓
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- ______ are chemicals that are used to make plants grow to produce lots of flowers or fruits.
- 'Fertilisers' ✓
- Some herbicides are called selective herbicides. What does this mean?
- The herbicide kills all plants that are sprayed.
- The herbicide kills only some types of plants that are sprayed. ✓
- The herbicide kills only insects that are sprayed.
- The herbicide kills no plants that are sprayed.
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- Chemicals are important in farming to help grow food for humans and other animals. However, too much use can be dangerous. Match the chemical with possible impacts on other organisms.
- Too much fertiliser⇔causes algae to grow quickly in lakes, reducing light and oxygen ✓
- Insecticides⇔can kill organisms that help with pollination ✓
- Herbicides⇔can kill plants that provide habitats for other organisms ✓
Worksheet
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Lesson Details
Key learning points
- Farmers use chemicals called fertilisers to produce more crops.
- Farmers use chemicals called pesticides to produce more crops.
- Some pesticides kill insects and this helps crops to grow because they are not being eaten.
- Some pesticides kill other plants (weeds) that compete with the crops to grow.
- Fertilisers and pesticides can be harmful to the environment and wildlife.
Common misconception
Pupils don’t realise that insecticides and herbicides are all examples of pesticides.
Pupils should understand pesticides are a group of chemicals that kill organisms. Different types of pesticide kill different types of pest.
Keywords
Fertiliser - Fertilisers are minerals that are added to the soil to help plants to grow.
Pesticide - Pesticides are chemicals that are used to kill organisms such as insects and weeds, which prevent crop growth.
Organic - Organic farming only uses chemicals that come from other living things (are not man-made).
Herbicide - Herbicides are a type of pesticide. They kill plants. They are sometimes also known as weedkillers.
Insecticide - Insecticides are a type of pesticide. These chemicals kill insects.
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