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Question 7 – Incorrect. Actual Answer was: Paracheirodon innesi. It has a thin black Stripe.

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Investigation an Ecosystem

By R Husthwaite

 home

1. An ecosysystem is made up of the animals and plants.

2. Rainfall is an abiotic factor.

    True

    False

3. What instrument might you use to count the number of ragwort plants in a large field?

    

4. Which of the following would you use to minimise the error when you are taking light readings?

    Get your partner to do it.

    Ensure that a different light meter is used for each reading.

    Don’t let your shadow fall on the sensor.

    Make sure that the height off the ground of each reading is the same.

5. Which instrument would you use to find out how acid or akaline soil is?

     meter.

Read the following key:

1. Body longer than tall …………. 2
  Body taller than long …………. 4
       
2. Not striped …………. Poecilia reticulata
  Black Stripe on body …………. 3
       
3. Thin black stripe …………. Paracheirodon innesi
  Wedge shaped black stripe …………. Rasbora heteromorphia
       
4. Not striped …………. Aequidens maronii
  Stripes on body …………. 5
       
5. Stripes dark and clear …………. Pterophyllum scalare
  Stripes faint …………. Symphysodon discus
A
B
C

6. Pterophyllum scalare is fish .

7. Fish B is:

    Paracheirodon innesi

    Rasbora heteromorphia

8. What do Aequidens maronii and Poecilia reticulata have in common?

    

9. Which of the following describes how an abiotic factor influences the distribution of an organism?

    A large number of birds of prey reduce the number of small rodents

    The higher up a mountain you get the less trees you find

    Grazing by rabbits increases the number of plant species

10. Which of the following is NOT a way of reducing the error rate when using a sweep net for sampling the small invertebrates in a stream?

    Use a different sized net for each sample

    Kick the gravel the same number of times

    Turn the mouth of the net over before removing it from the water

    Sample more than once and get average numbers of organisms