1. Kaupapa: 01 / 11 Wednesday Describe why plants need water
Describe how plants absorb water from their roots

2. Do you remember? Explain why the leaves are important
Describe the features of the leaves
Explain why the stem is important

5. Parts of a plant
Leaf
Stem
Root

6. Why do plants need water?

7. Plants need water so they can:
Obtain the dissolved minerals that keep them healthy
Allow chemical reactions such as photosynthesis to occur
Transport substances around the plant
Stay upright
Keep cool

8. How does water enter a plant?

9. How are roots adapted to absorb water?

11. Warning

13. Roots Branched and spread out through the soil to get lots of water.
Water is absorbed by osmosis.
Covered with root hair cells which have thin walls and large surface area to maximise osmosis.

14. Practical – Osmosis & Potato

15. Practical - Observing root hair cells

16. There is another reason why plants need roots...

20. Multiple-choice quiz

21. Anagrams

22. What have we learned today?
Why do plants need water?
How are the roots adapted to absorb water?

23. How does water enter a plant?
Water is one of the raw materials needed for plants to carry out photosynthesis.
How does water enter a plant?
Water from the soil enters a plant through the roots.
You can’t normally see them but
roots are a very important part of a plant.
Why are roots branched and spread out through the soil?

24. How are roots adapted? water Roots are branched and spread out
for two reasons:
to absorb water (and mineral salts)
from a large amount of soil.
to anchor the plant in the soil.
Taking a closer look, roots are
covered in root hair cells.
Root hair cells have thin walls
and a large surface area to help
them absorb lots of water.
How are roots adapted to their job?
water