1. Why is planet Earth said to be a closed system? (1) 2. What is a biome and can you name 3 biomes on planet Earth? (2)

Transcription

1 Spaceship Earth Homework No.1 1. Why is planet Earth said to be a closed system? (1) 2. What is a biome and can you name 3 biomes on planet Earth? (2) 3. What is meant by a habitat and can you name 3 habitats on planet (1) Earth? 4. What is meant by an ecosystem? (1) 5. State the difference between biotic and abiotic factors and give (2) two examples of each. 6. What are the seven characteristics shown by all living things? (1) 7. Write a short essay to describe how organisms (plants and animals) change to make them better suited to their environments and failure to do so can lead to their extinction you should use the terms adaptation, evolution and extinction. (5) 8. What is the difference between an endangered and a critically endangered species? give two named examples of each. (3) 9. State what is meant by the term environment and describe the environment in which you live and is all around you this could (3) include your home, neighbourhood, school etc.

2 Spaceship Earth Homework No.2 1. Study the information in the table about seaweeds then use it to copy and complete the branching key diagram below. (3)

3 2. Look at the key below and use it, and the two leaf diagrams, to answer the questions which follow. X Y (a) Identify leaves X and Y shown in the diagram. (2) (b) From the information given make a diagram of a horse chestnut leaf. (2) (c) Give 1 difference and 1 similarity between an oak and a beech leaf. (2)

4 Spaceship Earth Homework No.3 Students from Calderglen High went on a fieldtrip and carried out some sampling of a field to find out which plants were found in that area. Their findings are shown on the diagram of the quadrat below. Key: Daisy Dandelion Clover Toadstool 0.5 m 0.5 m 1. (a) Which organism is the most abundant in this sample? (1) (b) What is the number of Clover found in the quadrat sample above? (1) (c) What is the abundance of Toadstools in 1m 2? (2)

5 2. What are the two main types of biological key and why are keys used? (1) 3. State 4 ways you can sample an ecosystem? (4) 4. For a method of sampling an abiotic factor of your choice (light, moisture, ph etc) describe how you would carry this out. Put the (2) steps in the correct order. 5. Look at your answer to question 4 and then state any source(s) of error. For each source of error state what you would do to try to eliminate it. (2)

6 Space and Habitats Homework No.4 1. Copy and complete the following flow diagram. C D + W S + O (2) Light Energy + Chlorophyll 2. With the aid of a diagram describe how you carried out testing a (4) green leaf for starch. 3. Once plants make sugar they store it as starch explain why? (1) 4. Green plants are often said to be producers explain why. (1) 5. Use the information in the table below to draw a line graph to show the effect of light intensity on the rate of photosynthesis in elodea plants. (3) Distance from the lamp cms (X-Axis) No. of Bubbles of Oxygen Released per minute (Y-Axis)

7 Space and Habitats Homework No.5 1. What do the arrows represent in a food chain or food web? (1) 2. Using your knowledge or home resources draw a food chain of (2) your choice eg: Grass Zebra Lion 3. What is meant by competition when referring to wild ecosystems (1) and give a named example of competition in animals? 4. State 5 things animals compete for and 4 things plants compete for. (5) 5. State the meaning of the following terms and give a named example (4) of each: Producer Predator Herbivore Consumer 6. What is an indicator species and give a named example. (2) 7. Carry out some research and write a short essay on Why humans (5) must look after the environment.