Foliar feeding is a technique of feeding plants by applying liquid fertilizer directly to their leaves. Plants are able to obsorb essential elements through the stomata in their leaves. But total absorption takes place through epidermis.

CNG expansion - Compressed Natural gas.
Uses:
1. It is the cheapest and cleanest fuel.
2. Vehicles using this gas produce less carbon dioxide and hydrocarbon emission.
3. It is less expensive than petrol and diesel.

An indicator or acid-base indicator is a chemical substance which indicates the acidic or basic nature of a solution by suitable colour change. They may be natural or synthetic.

The amount of heat energy required by ice to change into water is called latent heat of fusion of ice.

i) To find the possibility of water on the Moon
ii) To find the elements of matter on the Moon.
iii) To search for the existence of Helium-3.
iv) To make a 3-dimensional atlas of the Moon.
v) To study about the evolution of the solar system.

A freely suspended magnetic needle at a point on the Earth comes to rest approximately along the geographical north-south direction. This shows that the Earth behaves like a huge magnetic dipole with its magnetic poles located near its geographical poles.

► Making use of disposable napkins or tampons may reduce chances of infection.
► Girls should realize that menstruation is as natural as any regular physiological activities.
► Girls are advised to use sanitary napkins or tampons rather than cloth. It should be changed frequently depending upon the menstrual flow. If a cloth is being used repeatedly, it should be cleaned with soap and hot water and dried in sunlight for reuse.

Muscle is a band or bundle of fibrous tissue in a body that has the ability to contract, producing movement or maintaining the position of parts of the body.

Ion or radical is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

The increased green house effect is caused due to increase in the air pollutants and it results in the average increase of temperature of the atmosphere. This is Global warming.

The process of depositing a layer of one metal over the surface of another metal by passing electric current is called electroplating.

Specific heat capacity of a substance is defined as the amount of heat energy required to raise the temperature of 1 kilogram of a substance by 1^oC the symbol C. It's SI unit is Jkg^-1K^-1.

\(\mathrm{d}=2000 \mathrm{~m} \mathrm{t}=8 \mathrm{~s}\)
\(\mathrm{v}= distance/time =\mathrm{d} / \mathrm{t}\)
\(\mathrm{v}=2000 / 8=250\)
\(\mathrm{v}=250 \mathrm{~ms}^{-1}\)

Biomagnification is the increase in contaminated substance due to the intoxicating environment. The contaminants might be heavy metals such as mercury, arsenic and pesticides such as polychlorinated biphenyls and DDT (Dichloro Diphenyl Trichloro ethane).