Question # 1

The most common element in the universe is

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oxygen

hydrogen

nitrogen

iron

The contents of sodium in leaf tissus vary from.

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0.01 - 10%

10-15%

12-16 %

The process which loops the amount of nitrogen constant in air is

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nitrogen fixation

nitrogen cycle

oxidation

photosynthesis

Each day a normal man breathe............ litres of air.

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20,000 to 15,000

10,000 to 15,000

15,000 to 20,000

21,000, to 31,000

The deficiency of iodine in human body casue.

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Goiter

Cancer

Tuberculosis

Cholera

The sun almost entirely consists to the element

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oxygen

iron

phosphorus

hydrogen

Which gas is slightly soluble in water.

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Neon

Carbon di oxide

Argon

Oxygen

Low iodine availability in humans causes the disease

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Goiter

Cancer

Tuberculosis

Cholera

Iodine .......... 131 is used in treat the........................

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Cancer

Bone growth

Thyroid

Brain tumor

The amout of carbon dioxide int eh air is increased by.

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Photosynthesis

Respiration

Burning

Evaporation

It is an organic compound

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natural gas

ammonium

water

sodium chlorides

If a key is stiff in a lock, rub the end of the key a soft pencil, which types of elements we obtain.

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Graphite

Silver

Gold

Paltinum

The body of a young boy contains approximately... litres of water.

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10

25

35

45

Bucky Ball is teh third form of pure.

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Carbon

Graphite

Magnesium

Diamond

It is not crystalline form of carbon

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charcoal

graphite

buckyballs

diamond

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