Pressure is determined as force per unit area of the surface. The SI unit of pressure, pascal is as shown below:
1 Pa = 1N m^–2
If mass of air at sea level is 1034 g cm^–2, calculate the pressure in pascal.

Express each of the following in SI units:
93 million miles (this is the distance between the earth and the sun)

Express each of the following in SI units:
5 feet 2 inches (the average height of an Indian female).

Define matter. Briefly describe the physical classification (three different stages) of matter.

Describe briefly the chemical classification of matter.
Or
Define the terms element, compound and mixture.

Give the points of difference between mixture and compound.