Oxygen is carried around the body by the:

The main parts of the human circulatory system are:

The charge on a sodium ion is always:

Which of the following does NOT contribute to unemployment?

In the reactivity series of metals the order is: sodium, calcium, magnesium, aluminium, which means that the most reactive metal is:

The constitutions of Commonwealth Caribbean countries guarantee citizens freedom of conscience, expression, assembly and movement. These freedoms are usually referred to as

A ripple travels over the surface of some water. Its wavelength is 2 m, its amplitude is 0.1 m and its frequency is 0.5 Hz.The speed of the ripple is:

Measuring plant growth by measuring height is convenient, but inaccurate because:

The graph shows the results of an experiment to investigate
the relationship between the voltage placed across a light bulb
and the current which then flows through it.Which one of the
following statements is NOT true?

A(n) __________ printer is suitable for printing multi-part forms because they easily print through many layers of paper.

Water is lost from the body in:

Photosynthesis is important because:

Two separate forces are acting on a bar to cause it to rotate clockwise. One force is 20 N, at a distance of 3 m out from the pivot; the second force, 2 m further out, is 10 N. Their combined moment is:

A rectangular tank is 50 cm long, 50 cm wide and 10 cm deep. The volume of liquid it will hold is

Which of the following would play an important part in a government′s efforts to increase consumption of locally produced food?

The only common gas that turns moist red litmus paper blue is:

Alcohol can be made by fermentation of all these EXCEPT for:

The optimum temperature for enzyme action is:

Sweating can help to cool the body. This cooling is achieved mainly by:

A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume. The sound wave she is producing has: