The device used to convert Alternate Current into Direct Current is called_____.

A. Anemometer
B. Battery
C. Galvanometer
D. Rectifier (more…)

The fourth state of matter is____.

A. Water
B. Salts
C. Vapours
D. Plasma (more…)

About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is_____.

A. Oxygen
B. Cabon Dioxide
C. Silicn
D. Clay

(more…)

Acid rain is mainly caused by emissions of _____ in the atmosphere.

A. Sulfur Dioxide and Potassium Nitrate
B. Sulfur and Charcoal
C. Nitrogen Oxide and Potassium Nitrate
D. Sulfur Dioxide and Nitrogen Oxide (more…)

In general, wind speed of 105–137 caused_____.

A. minor or no damage
B. considerable damage

C. severe damage
D. extreme damage

(more…)

Water covers ______ of the Earth’s surface.

A. 60%
B. 65%
C. 70%
D. 75%

(more…)

Who is considered the founder of meteorology?

A. Aristotle
B. Plato
C. Einstein
D. Newton

(more…)

Wind energy is the _____ energy.

A. Potential
B. Transverse
C. Kinetic
D. Mechanical

(more…)

The energy value of food is measured in____.

A. Joule
B. Calories
C. Tesla
D. Proteins

(more…)

The natural fats and oils are composed of_____.

A. Carbon, Hydrogen and Oxygen
B. Carbon, Hydrogen and Nitrogen
C. Carbon, Oxygen and Nitrogen
D. Hydrogen, Oxygen and Nitrogen

(more…)