Important keywords that we look out for

1)Temperature/ Water level has increased/decreased. (advisable to use this for tests and examinations)

2) Colder (object) gains heat from warmer object which is at a higher temperature.

I need to see the:

·        *direction of heat flow( from ____ to _____)

*difference in temperature

________gains heat from ______ at a higher temperature
_________ lost heat to_________ at a lower temperature

Activity 18
Topic: Expansion and contraction of a solid

Q2(b)How has the ball changed?
The ball has become bigger. It has expanded.

Q3(b) How has the ball changed?
The ball has become smaller. It has contracted.

You have to tell me how it has changed in terms of its size. We are also looking out for the terms "expanded" and "contracted" here in this topic.

Activity 19
6(a) What happened to the balloon?
The balloon was filled with more air and got inflated.
(You need to tell me what caused the balloon to become inflated. The balloon was filled with more air, so it got inflated.)

6(b) What caused this change?
The air in the glass bottle gained heat. It expanded and rose up into the balloon.
(You need to tell me how it got inflated. The air gained heat=>results in expansion=> air rose up => cause balloon to become inflated.)

Key learning point from this experiment:
Liquids and gases expand when they gain heat and contract when they lose heat.

Take note: Read the question very carefully. Highlight the keywords before doing the questions.

Science Practical Test ( Week 5)

Revision for Practical Test

Parts of an experiment
Aim / Objective: Why do the experiment? What are you trying to find out?
Materials
Procedure/ Steps
Observations/ Results: data collected recorded in the form of a list/ table/ graph
Conclusion: Relate back to the experiment
Infer/ predict: Can I make an educated guess on something else based on what I have learnt from this experiment?

Variables: Does the experiment include the comparison of any constant variables?

Apparatus/ equipment: Review the apparatus/ equipment used before from Primary 3 to now.
Scale: Take note of the scale on any measuring equipment and what 1 unit/ marking on the apparatus represent.

Acceptable errors: Due to experimental errors, we are sometimes not able to get the expected/ textbook results. Be able to identify where you went wrong and the cause of the error(s)

Scientific Variables( to have a fair test)

Remember: To have a fair test, only one variable can be changed to show how it affects the results of the experiment. The rest of the variables have to be kept the same.

Difference between heat and temperature

Using a thermometer

Temperature vs Heat

Temperature Song