Block B Questions : Science

1.       In chemistry, what property of an element indicates the number of atoms of hydrogen which will combine or displace one atom of that element?

2.       A regular icosahedron is a figure with 20 regular faces; what precise shape is each face?

3.       What is the lowest region of the earth’s atmosphere, whose upper boundary is about 10 to 15 kilometres above the Earth’s surface?

4.       Which complex, naturally-occurring chemicals are linked together by bonds between the sugar and phosphate groups to form the building blocks of nucleic acids such as DNA and RNA?

5.       What type of rock is of a finely-grained, sometimes glassy, basic igneous rock, generally found in the form of lava flows?

6.       In physics, according to the standard model, the electron, muon and tau, and their neutrinos, comprise which class of elementary particles which interact via the electro weak force and gravity, but are not affected by the strong interaction?

7.       Mechanics, the science that studies the effects of forces on bodies at rest or in motion, has two branches, one of which is dynamics; name the other.

8.       Discovered by Thomas Graham in 1861, what process for separating particles from a solution by differing rates of diffusion through a semi-permeable membrane is best known through the invention in 1943 by Willem Kolff of a machine which purifies blood?

9.       Which large sea-bird is sometimes known as the solan goose?

10.   On Earth, where can the abyssal plains be found?

11.   What name is given to a coastal body of shallow water, characterised by a connection with the sea which is restricted by islands or an atoll?

12.   Prevalent amongst athletes, what common term is used for medial tibial syndrome, characterised by pain in the lower leg, often due to muscular swelling resulting in inadequate blood supply to the muscle?

13.   Among vertebrates, which hormone is involved in reproductive behaviour and is secreted by the pineal gland, the blood containing higher level during darkness than in the light?

14.   In his ‘On the Equilibrium of Planes’ Archimedes purports to establish the ‘law’ of which mechanical device, to which he was referring when he supposedly said: “Give me but one firm spot on to which stand, and I will move the Earth”?

15.   Which complex carbohydrate substance serves to strengthen the tough outer cuticle of insects and crustaceans and the cell walls of many fungi?

16.   What term describes a dye that is absorbed by plaque and is therefore used, usually in tablet form, to highlight areas of the teeth that have not been properly cleaned?

17.   Used to make the first known coins in the western world, which material can occur naturally or be produced by alloying gold with varying amounts of silver?

18.   In astronomy, what are Monet, Raphael and Goya, which can all be found about 58 million km from the sun?

19.   The existence of which planet was predicted by John Couch Adams in the early 1840s, his calculations being confirmed by Galle and d’Arrest in 1846?

20.   Within the Earth, the Gutenberg discontinuity is the boundary between which two layers?

Answers

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