The position of an element in the Periodic Table is determined by its _____number.

A. Electron
B. Proton
C. Neutron
D. Positron

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Blood is cleaned by _____.

A. Lungs
B. Liver
C. Heart
D. Kidneys

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Urine is produced in ______.

A. Kidneys
B. Lungs
C. Large intestine
D. Liver

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At night, Plants intake _____ and release _____.

A. Oxygen – Carbon dioxide
B. Carbon dioxide – Oxygen
C. Oxygen – Carbon monoxide

D. Carbon monoxide – Oxygen

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Oxidation is a chemical reaction involving the _____.

A. Gain of Electrons
B. Loss of Electrons
C. Gain of Protons
D. Loss of Protons

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GPS is an abbreviation for?

A. Global Poles System
B. Global PolySiliconium Store
C. Global Positioning System
D. Global Position Structure

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In general, Comets have ______ orbits.

A. Elliptical
B. Highly elliptical
C. Circular
D. Parabolic

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In a very low temperature which from the following will freeze at last?

A. River water
B. Canal water
C. Sea water
D. Water in a lake

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During winter in cold countries, the _____ is mixed to melt the ice on the icy roads.

A. Salt
B. Chlorine
C. Carbon dioxide
D. Water

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