Life on Earth

Life on Earth

Summary

1. Use words from the list to complete the following sentences.

List population community habitat

A pond provides a for a of many different types of organisms. Plants of the same species form a .

2. The food web shows the feeding relationships of some of the organisms in a pond.

a)What do the arrows in the food web represent? .

b)A predator is an animal which hunts and kills other animals for food.

Give the names of two predators from the food web.

1.

2.

c)If a disease wipes out all the water beetles how would the stickleback be affected? Explain your answer.

Effect

Explaination

3.Name two methods used to help conservation of a species

1.

2.

4. Some features of common seaweeds are shown in the table below.

(a) (i) Use the information in the table to complete the key below by writing the correct feature on each dotted line and the correct seaweed names in the empty boxes.

(a) (continued)

(ii) Describe two differences between Sea lettuce and Spiral wrack.

1

2

(iii) Describe the features which Bladder wrack and Spiral wrack have in common.

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(b) Abiotic factors can affect the community of seaweeds that grow on a rocky shore.

Identify two abiotic factors from the list below.

Tick (✓) the correct boxes

Temperature

Competition

light intensity

grazing by limpets

disease

5. Nitrogen Cycle

a. Our atmosphere is ______nitrogen gas.

b. Animals and plants cannot directly use all the nitrogen found in our ______.

c. Only special bacteria can directly use nitrogen in our atmosphere and “fix” it so other organisms can benefit. These bacteria are called ______bacteria.

d. Higher organisms use nitrogen to make their ______.

e. Animal waste decay by the action of bacteria which create ______and ______products rich in nitrogen, and useful for plants to use again.

f. ______bacteria in the soil can break down the ammonia into the gaseous form of nitrogen, which is not available for use by plants or animals.

g. In another part of the cycle, animals eat ______containing nitrogen, which is again returned to the soil by animal ______or decaying ______and ______.

h. Draw a diagram of the Nitrogen cycle using the words in the text box.

6. Sampling

Give an example of a sampling technique and describe how you would use it to sample plants

Sampling technique ______

Description of use ______

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How do you ensure that this technique is reliable? ______

7.Give an example of a technique used to measure a non living factor and describe how you would use it.

Technique ______

Description of use______

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What problems might arise when using this equipment? ______

How would you resolve this problem? ______

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8a. What is compost made of?

b. Why do plants need compost?

9.Fertilisers (complete the table below)

Mineral / Importance

10. In modern farming name 3 pieces of technology that have helped farmers.

1.

2.

3.

11. What is a Blue Flag Beach?

12. Explain how a beach could be improved to help it become a Blue Flag beach.

13. Give an example of a plant found in a tropical rainforest and describe two adaptations that allow it to survive in this habitat

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1. Give an example of a plant found in a temperate forest and describe two adaptations that allow it to survive in this habitat

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1. What is the name given to a plant that is adapted to live in water?

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1. Give an example of a plant that lives in water and describe two adaptations that allow it to survive in this habitat

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1. Give an example of a plant that lives in a mountainous region and describe two adaptations that allow it to survive in this habitat

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1. What is the name given to a plant that is adapted to live in a very dry habitat?

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1. Give an example of a plant that lives in a desert and describe two adaptations that allow it to survive in this habitat

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20. Complete the table with the physiological adaptation of desert animals

Animal / Physiological adaptation
Camel
Desert Kangaroo Rat

21. How does the hormone ADH help the Kangaroo rat to survive in the desert?

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22. Complete the table of structural adaptations of animals and also say how it helps the animal.

Animal / Structural adaptation / Importance of adaptation
Elephant
Warning off predators
Prevent attack from predators

23.

Explain what the penguins are doing in the picture.

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24. Penguins feet never get cold. They also rest their eggs on their feet and cover them with their bodies to keep them warm.

25. Courtship is an important part of continuation of different species.

Give an example of an animal which has courtship behaviour.

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26. Cooperative hunting is an important part of some animal’s lives.

State how it can be of an advantage to work together as a group.

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27. We often speak to each other to relay information. How do bees communicate to relay information about a food source?

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28. Some animals work together in protective groups. Why do you think they might doe this type of behaviour?

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29. Dominance heirarcy’s help large groups animals of the same species to be kept in order. Name one other advantage of having a ‘Peking order’?

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30. Give an example of an animal which uses territories and explain how this helps the animal.

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31. Animals often learn from mistakes. This can lead to a long term modification of behaviour.

Give some examples of where animals learn a behaviour which makes them more successful.

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