Page 33 - 新思维科学学生用书5 样章

1 Life cycles of flowering plants

Think like a scientist 1

Observe a seed

You will need:

a bean seed, a saucer of water

• Soak the bean seed in water overnight.

Predict how the seed will change

overnight and why.
• Observe the seed the next day and

write down any changes that you see.
• Was your prediction correct? Explain why the changes happen.

Questions

1 Why do seeds need to absorb water?

2 a Which part of the new bean plant grows first?
b Suggest a reason why this part grows downwards.

3 a In which direction does the first shoot grow?
b Suggest a reason why this part grows in this direction.

4 Why do you think the new leaves start to grow above the ground?

5 Why do you think the seed shrivels and becomes small after germination?
6 Which type of scientific inquiry did you use in the investigation? Say why this

type of scientific inquiry was suited to this investigation.

What do seeds need

for germination?

Seeds germinate when they
have the right conditions.

Can seeds Will a seed
germinate without germinate if it is very
water or light? hot or very cold?

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