P4
What does an atom consist of?

P4
What is in a stable neutral atom?

P4
What are all electrostatic effects due to?

P4
What does the law of electric charges state?

What happens when a polythene rod is rubbed with a duster?

P4
What happens when an acetate rod is rubbed with a duster?

P4
What do anti-static sprays, liquids and cloths made from conducting materials do?

P4
In general what does an object have?

P4
What does a dust precipitator do?

P4
What are ions?

P4
What is placed in chimney's and how does it get rid of the harmful particles?

P4
What could cause an explosion?

P4
Describe how static electricity is used in spray painting.

P4
What happens if a person touches something with high voltage?

P4
What happens if the object to be painted is not charged and why is this bad?

P4
Can small amounts of charge flowing through the body be fatal?

P4
If the paint is negatively charged what should the object be?

P4
What are some examples of static electricity that isn't dangerous?

P4
How can electric shocks be avoided?

P4
What is defibrillation? Describe the process.

P4
What things or factors can change resistance?

P4
Describe voltage and how it can affect current.

P4
Describe the three types of wires.

P4
Describe fuses and why they're positive?

P4
What happens if the case of an appliance becomes live?

P4
Can the power of an appliance be restored?

P4
What is power rating?

P4
What can the formula power = voltage x current be used for?

P4
Describe ultrasounds.

P4
What is a compression?

P4
What is a rarefaction?

P4
Describe the features of longitudinal sound waves.

P4
Describe the difference between longitudinal and transverse wave vibrations.

P4
Describe how ultrasound breaks up kidney stones.

P4
Describe how an ultrasound is used in a body scan fully.

P4
Why can ultrasound be used for body scans?

P4
Why is ultrasound preferred to x-rays?

P4
Describe radioactive substances

P4
What does nuclear radiation cause and how?

P4
Describe radioisotopes.

P4
What is the half life?

P4
How can the nucleus of an atom be represented?

P4
How does an element change?

P4
Describe alpha fully.

P4
Describe beta particles fully.

P4
What is background radiation due to?

P4
Describe how a tracer is used to locate a leak in an underground pipe.

P4
Describe alpha particles in smoke detectors.

P4
Describe rock types in terms of radioactive materials.

P4
How do you know a rock is 4500 million years old?

P4
What is carbon dating?

P4
What is background radiation due to?

P4
List what we use radiation for.

P4
Describe ionisation fully.

P4
What is radiotherapy?

P4
How do you make materials radioactive?

P4
What happens when X-ray passes through the body?

P4
Difference between x-rays and gamma?

P4
Describe x-rays and how they're made and how gamma radiation is different.

P4
What happens when the nucleus of an atom of a radioactive substance decays?

P4
Describe how a radioactive tracer is used to investigate inside a patients body.

P4
What is a radioisotope used for in treatment and describe how.