The device used to convert Alternate Current into Direct Current is called
The fourth state of matter is
About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is
Acid rain is mainly caused by emissions of __________ in the atmosphere
In general, wind speed of 105–137 caused_______
Water covers __________ of the Earth’s surface
Who is considered the founder of meteorology
Wind energy is the __________ energy
The energy value of food is measured in_______
The natural fats and oils are composed of_________
