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Hypotheses on Matter Changes

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Hypotheses on Matter Changes

Read the investigation and evidence, then decide what you think will happen when an ice cube is warmed. For questions asking you to write your own idea, the answer gives one possible example.

The investigation

A group places equal-sized ice cubes in identical dishes. They put one dish in a cool place and another in a warmer place. Every five minutes, they record how much solid ice remains. Their question is: Does a warmer place make an ice cube melt faster?

Time (minutes)

Ice remaining in cool place (cm)

Ice remaining in warmer place (cm)

0

4

4

5

3

2

10

2

0

1.Which statement best describes a scientific hypothesis?
  • A testable prediction that gives a reason
  • A fact that can never change
  • A list of equipment
  • A result written after an investigation
2.Write a hypothesis for the group's investigation using “If…, then…, because…”. Predict what will happen to the ice in the warmer place.
3.In this investigation, what is the one factor the group changes on purpose?
4.What do the group members measure to compare melting?
5.Name two things the group should keep the same to make the comparison fair.
6.Use the evidence grid. After 5 minutes, how much more ice remained in the cool place than in the warmer place?
7.At 10 minutes, what does the grid show about the ice in each place?
8.Does the evidence support the hypothesis that ice melts faster in a warmer place? Explain using one result from the grid.
9.When ice melts, does it disappear or change into another form of matter? Name the form it becomes.
10.Suggest one improvement that would make the group's evidence more reliable.

2 printable pages

  • Hypotheses on Matter Changes, page 1 of 2: The investigation

    Page 1

  • Hypotheses on Matter Changes, page 2 of 2: 4. What do the group members measure to compare melting?

    Page 2

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