__________ % of the atmosphere is made of nitrogen.

The upper part of the thermosphere is called the ________.

The colour yellow is used to show ___________ on topographical sheets.

The colour _________ used to show barren land on topographical sheets.

Roads, rail tracks, wells.etc. are __________________ features shown on a map.

Along with carbon dioxide and methane, ___________ a potent greenhouse gas.

The __________ is the layer of the atmosphere that helps in radio transmission.

Contour lines on a map join points of equal ____________ on the surface of the earth above or below a reference point.

The rate at which the temperature drops in the _________ is 1 degree C per 165 metres.

This % of the atmosphere is composed of nitrogen.

The linear scale line is divided into __________ equal parts.

21 % of the atmosphere is composed of

The scale is stated in words

This is the ratio of distance between two places on a map to the actual distance between the same two places on the ground.

This layer of the atmosphere has the lowest temperature.

The rate at which the temperature drops in the troposphere is called

In this fraction, the numerator is always 1

This gas protects us from the harmful ultraviolet radiation

The distance between two points along a straight line can be measured by this method.