Explore the structure of a leaf, its types, and its vital role in photosynthesis.
A leaf has a lamina (blade), a petiole (stalk), and veins that transport water and nutrients. The midrib is the main central vein.
What is the flat, broad part of a leaf called?
The lamina (or leaf blade)
What is the stalk that attaches a leaf to the stem called?
The petiole
What are the thin lines running across a leaf, visible from the underside, called?
Veins
Leaves are the main site of photosynthesis, where plants use sunlight, water, and carbon dioxide to make food (glucose) and release oxygen.
What three things does a plant need for photosynthesis?
Sunlight, water, and carbon dioxide
What gas is released as a byproduct of photosynthesis?
Oxygen
Why is photosynthesis important not just for the plant, but for other living things too?
It produces oxygen, which most living things need to breathe, and forms the base of most food chains
1. What is the flat part of a leaf called?
2. What is the leaf stalk called?
3. Name the three requirements for photosynthesis.
4. What gas do plants release during photosynthesis?
5. What food substance do plants produce through photosynthesis?
6. What is the main vein running down the centre of a leaf called?
7. What pigment in leaves absorbs sunlight for photosynthesis?
8. Where does photosynthesis mainly take place in a leaf?
9. Why do leaves often appear green?
10. What raw materials does a plant absorb from the soil for photosynthesis?