The planet which is easily visible from the Earth is?
A. Mercury
B. Venus
C. Mars
D. Jupiter
The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in_____ of sea water.
A. 1 gram
B. 10 grams
C. 1 kg
D. 10 kg
The position of an element in the Periodic Table is determined by its _____number.
A. Electron
B. Proton
C. Neutron
D. Positron
At night, Plants intake _____ and release _____.
A. Oxygen – Carbon dioxide
B. Carbon dioxide – Oxygen
C. Oxygen – Carbon monoxide
D. Carbon monoxide – Oxygen
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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