Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
2nd October 2017
- 1Atomic Structure and the Development of the Model
Describe the plum pudding model.
- 2Radioactivity, Half-Life and Nuclear Uses
A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
- 3Forces
State whether friction is a contact force or a non-contact force.
- 4Motion: Speed, Velocity and Acceleration
A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
- 5Forces, Newton's Laws and Momentum
Explain, using Newton's Third Law, why a swimmer is able to push themselves forward by pushing backward against the water.
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