Page 16 - 新思维科学学生用书5 样章

1.1 Flowering and non-flowering plants

Most flowering plants have flowers with both male and female parts. But some plants have
flowers with only male parts or female parts, not both.

Think like a scientist 2

Observe and draw a flower

You will need:

a flower, hand lens, tweezers

Make sure you wash your hands after touching the flower.

• Draw the flower and label its parts.
• Count and record the number of petals, sepals and stamens. Record the results

in a table. Can you see a pattern?

• Carefully pull off the petals and sepals with the tweezers.
• Use the hand lens to look at the stamens and the carpel.

• Find the anthers. Touch their tips gently. What do you notice on your fingers?

• Find the stigma. Touch the tip. How does it feel?
Questions

1 Describe the function of each of these parts of a flower:

a petals
b anthers

c stigma

d ovary
2 Which part of the flower do you think makes scent?

3 Why are some flowers dark reddish brown with a

scent like rotting meat? You may need to look for
the answer in a book or on the internet.

How am I doing?

How well can I: or or

• draw a flower and label its parts?
• identify the functions of different parts of a flower?

• record observations in a table?

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