A scientific prediction is a testable statement about a possible outcome.

A condition that, when in short supply, slows down or limits the rate of a process such as photosynthesis.

An enzyme is a functional protein that acts as a biological catalyst to speed up chemical reactions.

Food security is having reliable access to enough safe and nutritious food to meet the needs of the human population.

Climate change is a long-term shift in weather patterns.

Climate change and photosynthesis

Combined science

Factors affecting the rate of photosynthesis

The effect of light intensity on rate of photosynthesis in pondweed: plan

The effect of light intensity on rate of photosynthesis in pondweed: practical

The effect of light intensity on rate of photosynthesis in pondweed: evaluation

The effect of light intensity on rate of photosynthesis in algae: plan

The effect of light intensity on rate of photosynthesis in algae: practical

The effect of light intensity on rate of photosynthesis in algae: evaluation

Light intensity and the inverse square law

Photosynthesis and limiting factors

Pupils learned about ways in which the human body maintains a constant internal environment in response to internal and external change, including changes in temperature and water balance.

This unit explores factors affecting photosynthesis rates and focuses on planning and conducting experiments. It includes selecting techniques, accurate measurements, data analysis, and evaluating methods to improve reliability and suggest further investigations.

Photosynthesis: factors affecting the rate

An increase in the rate of photosynthesis.

A decrease in the number of droughts and floods.

As atmospheric carbon dioxide concentration increases, which are likely outcomes?

increased atmospheric carbon dioxide levels

Starting with human activities, sort these statements by cause and effect.

the movement of particles from high to low concentration

the movement of water from high to low concentration across a membrane

energy is used to move particles against the concentration gradient

Nitrogen is absorbed through the roots by active transport. Match the terms to the definitions about transporting molecules.

What is the term describing an enzyme which has changed shape due to extreme pH or temperature?

Predict what will happen to the rate of photosynthesis if there is low rainfall for 2 months over summer.

Humans are animals which are producers and rely upon consumers for food.

Stormy weather reduces the amount of sunlight for photosynthesis.

Which reason explains why flooding or drought will cause human food insecurity?

Which of the following are producers in a food chain?

glucose + oxygen --> carbon dioxide + water

carbon dioxide + water --> glucose + oxygen

Which word equation describes photosynthesis?

A molecule that forms part of a reaction.

A molecule that speeds up the rate of a reaction.

The rate of an enzyme-controlled reaction __________ as the temperature increases up to the optimum.

Starter Quiz

Which of the following are producers in a food chain?