SCIENCE Year 7 Mid-Year Revision Questions

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States of Matter SCIENCE Year 7 Mid-Year Revision Questions 1. Recall three properties that most solids have in common. 2. Would liquids have the same three properties?

1 States of Matter SCIENCE Year 7 Mid-Year Revision Questions 1. Recall three properties that most solids have in common. 2. Would liquids have the same three properties? If not, describe the differences that might be expected. 3. Define the term diffusion. Give two examples of this occurring around your house. 4. Recall which unit is used for measuring small volumes such as that of liquid medicines. Which unit is used for measuring solids? 5. Copy and complete the diagram identifying the changes of state.

6. Use the table above to answer these questions. 7. Identify the temperature at which you would expect table salt to melt. 8. Identify the temperature at which it would freeze. 9.

2 6. Use the table above to answer these questions. 7. Identify the temperature at which you would expect table salt to melt. 8. Identify the temperature at which it would freeze. 9. Would you expect aluminium to be found as a solid, liquid or gas at: (a) 200 C (b) 680 C (c) 1900 C? 10. Identify which substance oxygen or nitrogen would freeze first if the temperature were gradually lowered. 11. Explain why solids have a fixed shape. 12. Explain why gases can be compressed. 13. Explain why gases fill their containers. 14. Describe what happens to the particles in a gas when it becomes a liquid. Recall what this change of state is called. 15. For each of the following changes of state of a substance, identify whether it involves adding energy to the particles or transferring energy away from the particles. (a) Melting (b) Condensation (c) Boiling (d) Freezing (e) Sublimation (f) Evaporation

3 16. If you take a bottle of salad dressing out of the fridge, you may notice that the oil and the vinegar have separated into different layers. Explain why this occurs. 17. Use the density equation on the previous page to calculate the missing values in the following table. 18. Recall what change you would expect to see when hot metal objects are cooling. Why does this happen? Explain, using the particle model. 19. Give two examples of structures that contain gaps to prevent them from buckling in hot weather. 20. Recall why gases can be compressed. 21. Recall in which state the forces of attraction between the particles are likely to be greatest. Cells 1. Sketch a line diagram of your school microscope and label as many of its parts as you can. 2. Explain why Robert Hooke was famous. Describe the appearance of the cells that Hooke observed in thin sections of cork. 3. Draw an animal cell and a plant cell, showing and labeling the parts that can be seen with a normal school microscope. 4. Identify which organelles are found in both animal and plant cells. 5. Identify which organelles are found in plant cells but not in animal cells. 6. Outline why the nucleus is important to a cell. 7. Recall the role of the cell membrane. 8. Explain what happens inside chloroplasts. 9. Define the term multicellular.

10. Recall which part of a cell controls the movement of substances in and out of the cell. 11. Complete the following sentences: (a) The movement of substances in and out of cells is called.

4 10. Recall which part of a cell controls the movement of substances in and out of the cell. 11. Complete the following sentences: (a) The movement of substances in and out of cells is called. (b) Water moves in and out of cells by. 12. Using the table above, and through your revision material, explain the difference between unicellular and multicellular organisms. Classification 1. State the characteristics of living things 2. The words respiration and breathing are often confused. Explain the difference between these two terms. 3. Recall what a dichotomous key is used for. Why is it called dichotomous?

4. 5. List the 7 levels of classification 6. List the 5 Kingdoms and provide an example of an organism in each. 7. Scientists list organisms by their scientific (binomial) name Genus and Species.

5 4. 5. List the 7 levels of classification 6. List the 5 Kingdoms and provide an example of an organism in each. 7. Scientists list organisms by their scientific (binomial) name Genus and Species. Find out the scientific name of the Australian Dingo, correctly writing it according to scientific convention. 8. Refer to the key below of animals. a. Describe the difference between vertebrates and invertebrates. b. Identify which group each of the following animals belongs to. (i) One with a backbone and a changing body temperature and that has gills (ii) One with no backbone, legs or covering shell and that has tentacles with stinging cells

6 c. Work through the key backwards to identify as many characteristics as you can for: (i) birds (ii) molluscs (iii) reptiles.

7 9. Refer to the diagram of vertebrates: a. Which group of vertebrates do humans belong to? Explain why. b. Identify the group of vertebrates that each of the following animals belongs to. -Snake -Cane toad -Goldfish -Whale -Emu -Shark c. Who am I? I have moist skin but no scales, and two pairs of legs. Although I have lungs and live on land, my young usually live in water and use gills to breathe.

9 10. Refer to the diagram on mammals: a. Outline how marsupials differ from all other mammals. b. How did placental mammals get their name? c. Identify which group of mammals the echidna belongs to. What other animal belongs to this group?

SCIENCE REVISION BOOKLET MID SEMESTER

SCIENCE REVISION BOOKLET MID SEMESTER 1-2018 NAME: GRADE: 5 ( ) DATE: 1 QA: KNOWLEDGE AND UNDERSTANDING. a. Fill in the blanks by choosing the words from the box below: Air sacs, arthropods, Cytoplasm,