An irrational fear is a phobia, e.g. fear of spiders or flying.

You might need a wake-up call if you have to get up early to catch a flight or a train.

You can get bitten by an insect, mosquito, snake, dog, or cat.

Many species have become extinct. Examples include the right whale, the dodo, dinosaurs, the Tasmanian tiger.

Animals can detect drugs, mines and bombs, and types of illness.

An expiry date is on packets of food or medicine.

If you need an inhaler you have asthma.

A sneeze is through your nose; a cough is through your mouth.

If a company has security issues it might lose important data, or criminals might be able to access their information.

Governments might ban smoking, types of medication, dangerous sports or activities, experiments on animals, driving in city centres, etc.

The opposite of boiling is freezing.

The signal is the connection to your mobile phone that allows you to make calls. Coverage is how many places your phone can get a good signal – it depends on yo

A doctor gives you a prescription, and you take it to the chemist to get your medicine. It can also mean the medication prescribed by the doctor.