Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
19th March 2006
- 1Atomic Structure
State the difference between irradiation and contamination.
- 2Atomic Structure and the Development of the Model
State the approximate radius of a nucleus compared with the radius of an atom.
- 3Radioactivity, Half-Life and Nuclear Uses
Explain why americium-241, an alpha emitter, is suitable for use in a smoke detector.
- 4Forces
A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
- 5Motion: Speed, Velocity and Acceleration
A skydiver reaches terminal velocity during free fall. Explain what is meant by 'terminal velocity'.
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