Science Focus 2 - Chapter Tests - Pearson Australia Media Resources

Science Focus 2 TEST
Chapter 1: Science skills
4 Brad uses a bread-making machine
every morning, to bake a loaf of bread
for his family’s breakfast. There are
only three ingredients specified on the
bread mix packet:
yeast (1.5 teaspoons), bread mix (3
cups) and water (1 cup). He uses the
built-in timer to control how long the
bread is cooked.
a List the variables in Brad’s bread
making.
b Explain how Brad could test the
effect of slightly changing the
amount of yeast and water, on the
final product.
5 Identify two examples of estimates.
6 a Illustrate the position of an eye so
the correct measurement may be
read below.
b What is the correct reading?
7 Identify examples of
a an instrument error.
b a human reaction time error.
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This page from the Science Focus 2 Teacher’s Resource may be photocopied for classroom use.
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