Page 11 - 新思维科学学生用书7 样章

1 Cells

Continued

Questions

1 Suggest why the cells from the onion do not look green.
2 Describe any difficulties you had with this activity. How did you solve them?

Self-assessment
Think about how you did this task.

For each of these statements, rate yourself.

if you think you did if you did it if you didn't do it all,
it very well, with quite well, or needed or needed a lot
no help some help of help

• I cut a piece of the inside layer of onion that was about 1 cm square.
• I was able to spread the piece of onion flat in the drop of water.
• I put the cover slip over the onion without getting any air bubbles.

• I saw onion cells down the microscope.
• I focussed the microscope so that I could see the cells really clearly.

• Write down one thing that you did really well in this activity.
• Write down one thing that you will try to do much better next time. How will
you do this?

Summary checklist

I can name all the structures in a plant cell, and describe what they do.

I can make a model of a plant cell, and discuss its strengths and limitations.
I can use a microscope to look at plant cells.

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