10 minutes maximum! Can you do it in 5?

1. Plants and some other organisms use the process of photosynthesis.

Which of theses sentences gives the best definition of photosythesis?

• A. The process of producing food in a chemical reaction using the energy from sunlight
• B. The process of organisms taking in nutrients and water
• C. The process of plants getting rid of waste products
• D. The process of cells obtaining energy from glucose through a chemical reaction.

2-4: Can you complete the chemical word equation for photosynthesis shown here?

5. Where in a plant does photosynthesis take place?

• A. in the roots
• B. in the branches
• C. in flowers
• D. in leaves

6. A chemical is present in plants that is vital for photsynthesis. it is green and gives all plants their green colour. What is this chemical called?

• A. chlorine
• B. glucose
• C. photochrome
• D. chlorophyll

7. Many plant cells have structures containing this chemical. What are these structures called?

• A. cytoplasm
• B. chloroplasts
• C. mitochondria
• D. cell membranes

8. Water is a vital part of the photosynthesis process. Where in a plant does this water come from?

• A. From leaves which absorb water from the air.
• B. From root hair cells which absorb water from the soil.
• C. From flowers which collect water from the rain.
• D. From the stem / trunk / branches of the plant or tree when it rains.

9+10. Leaves have many adaptations that help photosynthesis to take place.

9. Which of these is NOT an adaptation that supports photosynthesis?

• A. leaves are thin so that gases can easily diffuse in and out of the leaf cells
• B. leaves have thin tubes (xylem) to supply water to the cells
• C. leaves have a curved surface to help collect water
• D. leaves have a large surface area to collect sunlight for photosynthesis

10. What are 'stomata'?

• A. holes in the underside of the leaf where carbon dioxide gas enters
• B. holes in the top of the leaf where oxygen gas enters
• C. thin tubes (vessels) that transport glucose around the plant
• D. the points in the leaf where sunlight is collected and photosynthesis occurs