P-2 Life Processes in Living Organisms Part – 1 — Science STD 10 — Question

Write scientific reason.
Lithium and sodium are included in the same group in periodic table.

Give scientific reasons Indians should follow family planning for controlling the population.

Frogs can live on land as well as in water.

Atomic radius goes on increasing down a group.

A pencil dipped in water obliquely appears bent at the surface of water.
(OR)
When a pencil is partly immersed in water and held in a slanting position, it appears to be bent at the boundary separating water and air.

Give a Scientific reason.
Tungsten metal is used to make a solenoid-type coil in an electric bulb.

Write scientific reason.
The value of gravitational acceleration (g) decreases as we go above the Earth's surface.

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.

Hydroelectric energy, Solar energy and Wind energy are called renewable energies

Sometimes, higher plants and animals too perform anaerobic respiration.