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7
1.
Give some examples of background
radiation?
answer
Cosmic radiation
Rocks
Nuclear testing
Medical uses
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2.
What could you use to measure
radiation?
answer
Geiger-Muller tube
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3.
Nuclear fusion takes place in the sun.
Briefly describe what happens in this process.
answer
Two “light” nuclei join together releasing
energy.
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4.
Where are new elements formed?
answer
In the stars
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5.
How could you measure the pH of a
substance?
answer
•pH paper or universal indicator – add to
sample, check colour, compare to colour chart.
• pH meter (electronic method)
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6.
What metal is present if you see a blue / green
flame? (use
your data book)
answer
Copper
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7.
What metal is present if you see a lilac flame?
(use your data book)
answer
Potassium
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8.
What metal is present if you see a yellow
flame? (use
your data book)
answer
Sodium
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answer
Glucose
and Fructose
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10.
What would you use to separate a liquid
from a solid?
answer
Filtration
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11.
What would you use to separate a
mixture of gases or liquids?
answer
Distillation
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12. What would you use to prepare a solid
sample from an aqueous solution (something
dissolved in water)?
answer
Evaporation
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