Revision Wayground Y7

1. Which structure contains the green pigment needed for photosynthesis?

• A. Nucleus

• B. Cytoplasm

• C. Chloroplast

• D. Mitochondrion

2. Which cell structure is known as the control centre of the cell?

• A. Cytoplasm

• B. Chloroplast

• C. Nucleus

• D. Vacuole

3. Which part of a plant cell helps keep the cell from collapsing and shrinking?

• A. Cell wall

• B. Sap vacuole

• C. Cytoplasm

• D. Mitochondrion

4. Which structure is present in plant cells but not in animal cells?

• A. Nucleus

• B. Chloroplast

• C. Mitochondrion

• D. Cytoplasm

5. Why does particle model D represent a vacuum?

• A. It shows closely packed particles.

• B. It shows particles far apart.

• C. It shows no particles present.

• D. It shows liquid particles.

6. What is an alloy?

• A. A pure metal

• B. A mixture of two or more metals

• C. A gas

• D. A type of vacuum

7. Why is steel used instead of pure iron?

• A. It is cheaper

• B. It is weaker

• C. It is stronger and less likely to rust

• D. It reacts with air easily

8. What type of energy does the body use from food?

• A. Electrical

• B. Chemical

• C. Heat

• D. Light

9. What happens to energy that is wasted?

• A. It is created again

• B. It is destroyed

• C. It becomes less useful

• D. It increases

10. Why does Gabriel hear sound when air is present in the jar?

• A. Air particles conduct electricity

• B. Air particles vibrate and transfer sound

• C. Air cools the bell

• D. Air absorbs the sound