River erosion is at its greatest where the river’s

(1) depth is more

(2) breadth is more

(3) flow is fast

(4) gradient is more

In which of the following is the Great Barrier Reef located ?

(1) the Coral Sea

(2) the Solomon Sea

(3) the Bismarck Sea

(4) the Arafura Sea

The term ‘epicenter’ is associated with

(1) Earthquakes

(2) Volcanoes

(3) Cyclones

(4) Landslides

What is the scale used for measuring the intensity of the earthquake?

(1) Richter scale

(2) Metric scale

(3) Centigrade scale

(4) Newton’s scale

The Equator represents

(1) line joining North and South poles

(2) imaginary line passing round the Earth midway between North & South poles

(3) a belt (ring) around the planet Saturn

(4) axis of rotation of Earth

The acceleration due to gravity at the equator

(1) is less than that at the poles

(2) is greater than that at the poles

(3) is equal to that at the poles

(4) does not depend on the earth’s centripetal acceleration

The ‘Pacific Ring of Fire’ is associated with

(1) oil well fires

(2) thermal power station

(3) volcanoes and earthquakes

(4) forest fires

Which one of the following rivers forms an estuary ?

(1) Ganga

(2) Tapti

(3) Godavari

(4) Mahanadi

How much of the Earth's land surface is desert ?

(1) 1/10th

(2) 1/5th

(3) 1/3rd

(3) 1/6th

What percentage of the world’s freshwater is stored as glacial ice?

(1) 50%

(2) 10%

(3) 70%

(4) 30%

The approximate circumference of the Earth is

(1) 13,000 km

(2) 20,000 km

(3) 25,000 km

(4) 30,000 km