Page 39 - 新思维科学学生用书5 样章

1 Life cycles of flowering plants

Continued

5 a What is the process called when plants spread their seeds?

b Describe two ways that seeds can be adapted to be spread by animals.
6 Copy and complete these sentences about germination. Use the words in the

boxes to help you.

food store air shoot warmth
root
swells downwards absorbs
upwards

When a seed starts to germinate it water and
.

The seed gets energy from its .
The is the first part of the new plant that starts to grow.

It grows . The grows next. It

grows .
Seeds need water and to germinate.

7 Junaid’s class germinated seeds under different conditions. These are their results.

Conditions Number of seeds germinated

Warm, light 10
Warm, dark 15

Cold, light 5

Cold, dark 7

a Which conditions are best for germination?
b Do seeds need light for germination? Use the results to explain your answer.

c Did the seeds get water or not? How do you know this?

d Junaid must draw a graph of the results. What type of graph should he draw
and why?

e Draw the graph for Junaid.

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