Cambridge Secondary (7-9). Stage 9. MCE Science. Student Book - Unit 1: Photosynthesis and Transport in Plants

How does deforestation affect us, besides reducing our food supply?

Have you observed how seedlings grow into adult plants? As seedlings grow, they become taller and bigger. What enables them to do this?

Chlorophyll gives plants their green colour. Can plants without green leaves, such as this Begonia Rex, photosynthesise? Explain your answer.

Think back to the question at the start of the chapter. The carbon dioxide that trees take in from the atmosphere is stored in their wood. What is the impact of deforestation on the level of carbon dioxide in the atmosphere?

Think back to the question at the start of the chapter. The carbon dioxide that trees take in from the atmosphere is stored in their wood. How does the change in the level of carbon dioxide affect us?

A potted plant has one of its leaves half-covered with black paper. The plant was kept in a dark cupboard for 48 hours. The plant was then removed from the cupboard and put in bright sunlight for several hours. The covered leaf was then plucked from the plant to test for starch with iodine solution.



Why do you think the plant was first kept in the dark cupboard?

A potted plant has one of its leaves half-covered with black paper. The plant was kept in a dark cupboard for 48 hours. The plant was then removed from the cupboard and put in bright sunlight for several hours. The covered leaf was then plucked from the plant to test for starch with iodine solution.



Why was the plant put in bright sunlight afterwards?

A potted plant has one of its leaves half-covered with black paper. The plant was kept in a dark cupboard for 48 hours. The plant was then removed from the cupboard and put in bright sunlight for several hours. The covered leaf was then plucked from the plant to test for starch with iodine solution.



Which part of the leaf would turn blue-black in the starch test?

Define photosynthesis.

State the products of photosynthesis.

Describe how a plant obtains the raw materials it needs for photosynthesis.

In what form is excess glucose stored in a plant?

Water is essential for all living things. For humans and other animals, water keeps us hydrated, supports skin health, aids digestion and helps to regulate body temperature. For plants, water is just as important for staying healthy. What happens to a plant when it does not receive enough water?

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. Write a hypothesis for your investigation.

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. Identify the variables you need to change, keep the same and observe.

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. Decide on what equipment you will need.

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. Think about how you can ensure that your results are reliable.

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. Decide on how you will record your observations.

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. List the safety precautions you should take when carrying out the investigation.

In small groups, plan an investigation to find out how the absence of magnesium or nitrates affects a locally available plant species. Write a plan for your investigation.