Gas exchange in plants is when photosynthesising leaves take in carbon dioxide gas and release waste oxygen gas.

Cells next to stomata that can change shape to open and close the stomata.

Diffusion is caused by the continuous random movement of molecules of a gas (or of a liquid).

When more molecules of a gas (or of a liquid) diffuse from an area of higher concentration to an area of lower concentration.

Adaptations of plants for photosynthesis: gas exchange and stomata

Science

Plant nutrition

Photosynthesis

Adaptations of plants for photosynthesis: absorbing light

Pupils will learn about differences in the cell structures of eukaryotic and prokaryotic organisms.

Pupils learned about gas exchange in humans, and cellular respiration in all living organisms uses glucose as a fuel to provide energy for life processes.

This unit covers photosynthesis, including how plants produce carbohydrates, absorb water and minerals, and the role of leaf stomata in gas exchange. It highlights the importance of photosynthesis in sustaining life on Earth and explores the adaptations of leaves for photosynthesis.

Plant nutrition and photosynthesis

What is the name of the tiny holes in the surface of a leaf?

The diagram shows some structures that make up a plant’s leaf. Which part of the diagram shows one of the leaf’s stomata?

{{ }} cells can change shape to open and close stomata.

Which process allows gas exchange through open stomata during photosynthesis?

Which diagram shows the correct **concentration gradient** of particles of **oxygen** gas when the cells inside the leaf are photosynthesising?

Net movement **from** inside the leaf **to** the outside.

Net movement **from** the outside **to** inside the leaf.

Which statement describes the **net movement** of carbon dioxide particles when the leaf cells are photosynthesising?

Which part of a plant takes in gas for photosynthesis **and** releases gas made by photosynthesis?

What is the name of the gas that plants take in for photosynthesis?

What is the name of the gas that plants make as a waste product from photosynthesis?

Carbon dioxide gas and oxygen gas are made up of _____ .

When particles of a gas move from one place to another, this is called _____ .

More of the particles will move from **area A** to **area B**.

More of the particles will move from **area B** to **area A**.

The same number of particles will move between both areas.

The diagram shows particles of a gas. Which statement is correct?

Adaptations of plants for photosynthesis: gas exchange and stomata

Lesson outcome