The term __________ designates equipment that might be added to a computer system to enhance its functionality.

In the diagram, B is due north of A; C is east of B, and AB = BC.

When limestone is heated strongly it changes into:

This question refers to the triangle PQR in which angle QPR = 90°, PR = 12 cm and PQ = 5 cm.

The length of QR, in cm, is

An insoluble metal oxide can be described as:

Osmosis is:

Some foods contain flavour enhancers. These food additives:

Two resistors, one of 4 Ω and one of 6 Ω, are connected in parallel.Their combined resistance is:

The decimal equivalent of ⁷/₈ is

In electrolysis the anode is the:

The triangle ABC above shows the angle of elevation of the top, B, of a tower, BC, from A, to be 30°. AB = 40 m. The length of BC is

Nitrogen fixation produces:

A salt that contains water of crystallisation is:

1 mole of gas occupies 24 litres at room temperature and pressure, so the number of moles in
72 litres is:

In a school of 910 pupils, ²/₅ are girls and ²/₇ of the girls play netball. How many girls play netball?

When large molecules are broken down into smaller ones it is called:

The following diagram shows a model used to show how breathing movements take place:

Which part of the model represents the diaphragm?

The specific heat capacity of a particular liquid is 3000 J kg^-1 K^-1. A large beaker containing 2 kg of the liquid has to be warmed from 25 ℃ to 35 ℃. A 100 W heater is used. If all the thermal energy could be transferred to the liquid, how long would it take?

Candied fruits are preserved in a strong solution of:

The chemicals that make up the bodies of animals and plants are called: