1 of 17© Boardworks Ltd 2011 Leaves. 2 of 17© Boardworks Ltd 2011.

1 of 17 © Boardworks Ltd 2011

Leaves


Leaves are the most efficient solar panels on Earth!

Leaves come in a variety of shapes and sizes, but they share certain features that maximize photosynthesis.

What does this mean?

Like solar panels, leaves convert energy from the Sun into usable chemical energy. This is through the photosynthesis reaction.

How do leaves maximize photosynthesis?


Photosynthesis


How are leaves adapted for photosynthesis?


Structure of a leaf activity


Photosynthetic pigments


Take a look inside a leaf


Looking at real leaves


Palisade cells


How do gases enter and leave plants?

On the underside of leaves are small holes, or pores, called stomata. A single hole is called a stoma. Each stoma is surrounded by two guard cells.

When guard cells gain water, they curve outwards. This opens the stoma, allowing carbon dioxide in and oxygen out.

Losing water causes the guard cells to come closer together, closing the stoma. This stops the movement of gases, but also prevents water loss.


Water

As well as carbon dioxide, photosynthesis also requires water.

Water is also needed to hold the plant upright so that it can absorb more light.

Water is taken in by the roots and travels up the stem of the plant. It is distributed to the leaves through the veins.


Leaf adaptations


Glossary


Multiple-choice quiz

1 of 17© Boardworks Ltd 2011 Leaves. 2 of 17© Boardworks Ltd 2011.

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