The Changing Earth

Who suggested the Continental Drift theory?

• Aldrin Weiner

• Isaac Newton

• Alfred Wegener

• Thomas Cook

What does the Continental Drift theory state?

• The continents were once joined in a super continent and have slowly moved over time.

• The Earth is broken into lithospheric plates that move due to convection currents.

• Continents are stationary and don't move.

• None of the above

A super continent that existed 200 million years ago was ________________ .

• Laurasia

• Eurasia

• Africa

• Pangaea

Dormant volcano is also known as __________________ volcano.

• living

• dead

• sleeping

• dancing

Volcanoes that have recently erupted are known as _____________ volcano.

• Extinct

• Dead

• Dormant

• Active

__________________ is the place of origin of an earthquake.

• Focus (Hypocentre)

• Epicentre

• Seismic wave

• Seismograph

Name the type of Earthquake wave shown in the figure.

• Primary wave

• L wave

• Secondary wave

• Surface wave

'Ring of fire' represents an area of earthquake and volcanic activity that surrounds the Pacific Ocean.

• False

• True

The Earthquake in Bhuj (Gujarat) occurred in ______________ .

• 2002

• 2004

• 2001

• 2003

Geologists/Petrologists and seismologists study ______________ and _______________ to determine what is happening inside the earth.

• plants and animals

• oceans and land

• land and space

• rocks and seismic waves