P4

What does the law of electric charge state?

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

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

What will happen if someone touches something at a high voltage?

Name 2 instances where static electricity can be annoying

Name 4 ways that people can avoid electric shocks

What products can carry away electric charge?

How do dust precipitators work?

Why are dust precipitators used?

How is static electricity used in paint spraying?

What happens if the object being painted has no charge?

How do defibrillators work?

What does a variable resistor/rheostat do?

What qualities of wire makes a wire more resistant?

For a fixed resistor, what happens when it is connected to a voltmeter?

For a fixed power supply, what happens when the resistance increases?

What is resistance measured in?

What does the live wire do in your house?

What does the neutral wire do in your house?

What does the earth wire do in your house?

What does a fuse do?

What two things stop a person from receiving an electric shock and how?

What can you buy to save yourself buying a new fuse every time it blows?

What is ultrasound?

What kind of wave does ultrasound travel as?

What are the features of a longitudal sound wave?

What is the main difference between longitudal and transverse waves?

How is ultrasound used to break down kidney stones?

How is ultrasound used in a body scan?

How can the internal structure be known?

What does the proportion of ultrasound returned tell us?

What happens if the tissues are very different (e.g. blood and bone)?

What are the two advantages the US has over x-rays?

What does nuclear radiation cause?

Is radioactive decay a random or a programmed process?

Why will the count rate always be pretty much the same for a radioisotope?

What kind of nuclei does a radioisotope have and what does this mean?

What does it mean by 'the half-life' of a radioisotope?

What are both protons and neutrons?

What does a
mean? z X

What are the 5 properties of an alpha particle?

What happens to an element once it has been ionised by an alpha particle?

What is the nuclear for alpha decay of uranium?

What are the 4 main properties of a beta particle?

What happens to an element during beta decay?

What is the nuclear equation for beta decay of carbon?

When is gamma radiation given off?

What are the 3 things that background radiation is due to?

Name 3 types of background radiation

How is a tracer used to locate a leak in an underground pipe?

Why is gamma radiation used as a tracer?

How does a smoke detector work?

What happens to uranium when found in substances such as granite?

How can you find the approximate age of a rock containing uranium?

How does comparing the two elements help?

What is the radioactive isotope that is present in all living things?

What does measuring the amount of carbon-14 in an archaeological find tell us?

Describe the process of using carbon dating to find a sample's age

Why is alpha not useful for diagnosis or therapy?

Why can beta radiation be used to treat eyes but not the rest of the body?

Why is gamma radiation (such as Cobalt-60) good for treating cancers?

Why is ionisation not good for people?

What is radiotherapy?

How can materials be made radioactive?

What happens when someone has an x-ray?

How are gamma and x rays different/similar?

How are x-rays made?

Why is making x-rays easier than making gamma rays?

What does technetium-99m do?

What is the tracer Iodine-123 commonly used for?

How do we use tracers to investigate different parts of the body?

How are tumours destroyed?

How are radioisotopes used to destroy a tumour?

What are the two isotopes found in uranium?

What is different between uranium and 'enriched' uranium?

When does fission occur?

How does fission produce electricity?

What is a nuclear bomb an example of?

How does the chain reaction of fission occur?

What two elements are normally made when the fission of uranium-235 occurs?

How is the chain reaction continued?

How does a graphite moderator help control nuclear fission?

How do boron control rods help control nuclear fission?

When does nuclear fusion occur?

Why does fusions use for large-scale power generation remain a dream?

How do they keep down the costs of research into fusion?

Name an example of when nuclear fusion takes place

How do fusion bombs work?

What are the problems with carrying out fusion on earth?