Mcq's
The human body has how many bones?
The Earth takes approximately how long to orbit the Sun?
The Moon takes approximately how long to orbit the Earth?
Ozone layer is in which layer of the atmosphere?
The speed of sound in air is approximately
Vitamin C deficiency causes
Vitamin D deficiency causes
The normal human body temperature is
Blood type AB is called
Blood type O is called
The chemical symbol for iron is
DNA stands for
The powerhouse of the cell is
Photosynthesis takes place in
The largest planet in our solar system is
The closest planet to the Sun is
The speed of light is approximately
Water boils at what temperature (at sea level)?
Water freezes at
The chemical formula of water is