Biology · Lesson 7

How a leaf makes food

Light, water and air go in. Sugar and oxygen come out.

What the leaf takes in

1Light from the sun
2Water from the roots
3Carbon dioxide from the air
Inside the leaf

Chloroplasts do the work

Tiny green parts in each cell catch light and use it to build sugar.

In and out

Goes in

Water and carbon dioxide

Comes out

Sugar and oxygen

vs

Match each part to its job

Drop herePull up water
Drop hereCatch light
Drop hereLet air in and out
Drop hereFeeds the plant
6

molecules of oxygen released for every molecule of sugar made

“
Every breath you take was made by a plant.
Remember this
Quick check

Which of these does a leaf give out?

Homework

Draw the cycle from memory

Label what goes in, what comes out, and where it happens.