Forecasting weather

Transmitting radio signals

Remote sensing

All of the above

Only (a), (b) and (c)

Only (a) and (b)

Only (a), (b) and (d)

Only (b), (c) and (d)

Because of its small size

Because it is at a large distance from Earth

Because of the glare from the sun

Both (1) and (2)

dullest; west to east

dustiest; west to east

brightest; east to west

dullest; east to west

the blue planet; two

the red planet; three

the grey planet; three

the red planet; two

Neptune is an outer planet.

Neptune has a large number of moons.

Neptune is at maximum distance from the sun.

All of the above

Uranus rotates from east to west.

Uranus has a highly tilted rotational axis.

Uranus in its orbital motion appears to roll on its side.

Uranus can be seen through small telescopes.

Saturn has a large number of satellites.

Saturn appears yellowish in colour.

Rings of Saturn can be seen with naked eyes.

Both (1) and (2)

Due to reflection of light from water and landmass

Due to refraction of light from water and landmass

Due to transmission of light from water and forests

Everything looks blue and green from space

meteors

asteroids

venus

shooting stars

Linear

Borrelly's

Halley’s

Hartley's

Small meteors are known as meteorites.

Meteors that reach the surface of the earth before evaporating completely are called meteorites.

Meteors that crash into the surface of the earth at night time only are called meteorites.

Meteors that reach the surface of the earth after cooling down in the cold upper reaches of the atmosphere are called meteorites.

Chemical reactions in the core of meteors heat them up, liberating light.

Friction due to atmosphere heats them up, liberating light.

Gravitational force of Earth heats them up, converting potential energy to heat energy.

Entering Earth's magnetic field ionises their particles and they start glowing.

Its density is more than that of water.

Its density is less than that of water.

Its density is equal to that of water.

We do not know anything about its density.

High temperature range, presence of water, blanket of ozone

Low temperature range, presence of water, blanket of ozone, atmosphere

Suitable temperature range, atmosphere, presence of water, blanket of ozone

Suitable temperature range, carbon dioxide, presence of water, blanket of ozone

318; four

315; four

310; five

305; five

It has bright head and long tail.

It has dull head and long bright tail.

It has bright head and short tail.

It has dull head and short bright tail.