Explanation

Magma that is low in silica and high in iron and magnesium is mafic magma.

Mafic magma is also known as basaltic magma

Silica content: Mafic magma has a silica content of roughly 50%. 

Mafic magma contains dark-colored minerals, such as olivine and pyroxene,

Explanation

Solid carbon dioxide, also known as dry ice

It is a cooling agent that has a lower temperature than water ice and is solid

It is extremely cold, with a temperature of −109 °F (−78 °C). 

Explanation

Explanation

Weight of the adult men brain $=49$ ounces
So, $49$ ounces
$=\frac{49}{16}$  pounds
$=3.0625$ pounds
Therefore, the weight in pounds is $3.0625$.

Explanation

Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure.

The bubbles in fizzy drinks are caused by carbon dioxide (CO2).

Soft drink manufacturers add fizz by dissolving carbon dioxide into the water at high pressures.

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Explanation

All plants move Anticlockwise around Sun.

All plants move anticlockwise around their axis.

Earth rotates its axis from West to East.

Explanation

• Bats can also fly in the dark because they are capable of taking the help of   Ultrasonic Waves 
• ***
• concept:
• They are guided by ultrasonic waves produced by them.
• Bats are guided by ultrasonic waves which they produce and enable them to fly in the dark
  
  

Explanation

Geographers broadly divide the Earth into three separate climate zones: 

1. Tropical (near the Equator)
2. Temperate (north and south of the Equator)
3. Polar (the farthest Northern and Southern regions)

Explanation

The acceleration due to gravity is 9.8 m/s² downward.

This force acts on the ball throughout its motion.

This pulling it back to the ground after it is thrown upwards.

Explanation

A myopic defect can be corrected by using a concave lens of suitable power. 

Myopia is a disease related to Eye

Myopia is a common vision condition in which we can see objects near to us clearly, but objects farther away are blurry.

Myopia means دورکی نظر کی کمزوری