[Natural world]

1.What fish looks like a seaweed?
2.Which birds trot on lillies?
3.Can a bird change the shape of its beak?
4.What is the heaviest bird in the air?
5.Which chicks fly on the day they are born?
6.Which polar animal has the longest hair?
7.What colour is a polar bear's skin?
8.Which is the smallest migrant bird?
9.What mini beast can suffocate a caribou?
10.How long is the longest stick insect?

[Science]

1.The hottest part of lightning can reach a temperature six times hotter than the surface of the Sun. True/false?

2.Who introduced the Morse Code?

3.Electrical resistance is what makes the filament (long, thin piece of wire) in a bulb glow and the element in an electric heater become hot. How this resistance is measured in ohms. After whom is it named?

4.As long ago as 1810, many large cities had street lighting, using an electric current which jumped between two rods. Who introduced this system which was known as ‘arc lighting'?

5.Who invented the chronometer in 1735 to calculate longitude and latitude more accurately than early time measurement tools?

6.Name the Dutch scientist who constructed the first mechanical clock with a pendulum mechanism in 1657?

7.Who invented a pendulum clock which was so accurate that it was used in the Royal Observatory of Greenwich?

8.What was the first crude tools of measurement?

9.What is the modern unit of measurement for a large area of land?

10.When was the Cadil, the metric standard of capacity which became known as the litre established?

Answers:

[Natural world]

1.The pipe fish. They are long, slim dark green fish that look just like strands of seaweed in shallow, weedy waters. They swim upright among the seaweed fronds.

2.Jacanas. They are sometimes called ‘lilly-trotters'. They live in ponds and lakes walking on lilly pads to catch the insects that live on them. Their long feet spread their weight so that the leaves don't bend and sink.

3.Yes. An oyster catcher's beak changes in a few weeks from short and blunt while its eating cockles and mussels to long and narrow when its diet changes to worms and other soft prey.

4.The Kori bustard from East and South Africa. It weighs about 14 kg (31 lbs) Because it finds flying such hard work, it does so only in emergencies and only for short distances.

5.The chicks of the mallee fowl in Australia, soon after they merge from the heap of warm sand where they hatched, the chicks fly up to a branch to roost in safety. They have to look after themselves from the first day, unlike most other chicks who are fed and protected by their parents.

6.The Musk Oxen. They are large beasts related to sheep and goats. Their thick coats contain two different kinds of hair. The shaggy outer layer includes hair up to 1 m (3 feet) long. The dense, short woolly fur beneath gives extra warmth.

7.The polar bear's skin is black. The hollow hairs on its thick fur reflect the light and make its skin look white.

8.The rufous humming bird which is less than 9 cm (4 in) long. It flies every year from Alaska to its winter quarters in Mexico; a round trip of 6,400 km (3,800 miles).

9.The warble fly lays its eggs in the cariben's skin. When maggots hatch out, they burrow into the skin and feed on the caribon's flesh. Sometimes so many maggots hatch out in a caribon's throat that it dies from suffocation.

10.The longest stick insect is the sawfooted stick insect of South-East Asia. It grows up to 33 cm (13 in) long – as long as a pet rabbit.

[Science]

1.True
2.Samuel Morse – a dot and dash code of short and long electrical signals.
3.German scientist George Simon Ohm.
4.Sir Humphrey Davy.
5.John Harrison
6.Christian Huygens (1629-1695)
7.W.H. Short in 1921.
8.Parts of the body. Shorter units of length were measured against the thumb – the Roman ‘Uncia’ became the inch – the handspan or the foot. Longer lengths were measured against the forearm or a stride.
9.A hectare which equals 100 acres or 10,000 sq metres.
10.In 1794.