Page 39 - 新思维科学学生用书7 样章

2 Materials and their structure

Continued

5 Heat the water.
6 Use the thermometer to measure the temperature every minute.

7 Repeat until the water is boiling vigorously.
Questions
1 Plot your temperature measurements on a graph. Put the time along the
horizontal axis and the temperature on the vertical axis.

2 Describe your graph. You could complete these sentences.
• When we heated the water, the temperature
• The longer we heated the water, the the temperature

• The increase in temperature was
You could mention how quickly the temperature increased and if the temperature
increased by the same amount each minute.
3 What happened to the temperature of the water when it was boiling?

4 Why do you think this happened?
5 The thermometer is held in the water so that it does not rest on the bottom of the
beaker. Why?

• Describe any problems you had with this investigation. How did you solve
them?
• Think about how you carried out this investigation. What did you do to keep

safe? Could you have made the investigation any safer?

Summary checklist

I can name the three states of matter.
I can use the correct terms to say how water changes from solid to liquid to gas.

I can use a thermometer and a measuring cylinder accurately.
I can carry out an investigation safely.

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