Answers to AQA GCSE Gravity
Practice Questions
1. Define the term mass
Mass is the amount of matter in an object.
2. Define the term weight
Weight is the force acting on an object due to gravity.
3. On the diagram below, mark with an X where you would start to draw a force arrow for the weight force.
The force arrow would start from where the centre of mass is located. As this is a regular shape, draw lines of symmetry. Then place an X where the lines intersect.
4. Define the term centre of mass
Centre of mass is where the weight of an object may be considered to act at a single point.
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations