Science Do as directed.

1 \text { micron }=10^{-6} m \text { (or) } \mu m \text {. }

Kelvin is the SI unit of temperature.

The force with which the earth attracts a body towards its center is called weight.

Mass is the amount of matter contained in a body.

kilogram is the standard unit of mass.

Newton is the standard unit of weight.

The units of area, volume, density.

The examples of fundamental units are kg for mass,m for length, s for time.

\frac{( F -32)}{1.8}+273=\frac{(112-32)}{1.8}+273=\frac{80}{1.8}+273=44.44+273=317.44 K

100+273=373 K \cdot \text { ie. }{ }^{\circ} C +273

\text { The distance travelled by light in one year in vacuum. } 1 \text { light-year }=9.46 \times 10^{15} m \text {. }

AU is defined as the average distance between the earth and the sun.1 AU =1.496 \times 10^{11} m

km, AU, light-year, parsec.