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Class 11 Interior of the Earth worksheet
CBSE Social Science. Sources of information, earthquake waves and shadow zones, the crust, mantle and core, volcanoes and intrusive landforms. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The earth’s radius is about:
- 12,756 km
- 400 km
- 2,900 km
- 6,378 km
Answer
(d) 6,378 km
- 2.
A seismograph is 62° from the epicentre of an earthquake. Which waves will it record?
- both P and S-waves
- P-waves only
- neither P nor S-waves
- S-waves only
Answer
(a) both P and S-waves
within 105°: both
- 3.
What is meant by “lava”?
- the weak upper mantle, main source of magma
- an instrument that records earthquake waves
- the point inside the earth where energy is released
- molten rock that has reached the surface
Answer
(d) molten rock that has reached the surface
Section B · short answer
- 4.
Name two direct sources of information about the interior.
Answer
Mining and deep drilling (also material from volcanic eruptions).
- 5.
Two seismographs are (a) 34° and (b) 113° from an epicentre. Which waves does each record?
Answer
(a) both P and S-waves (b) neither P nor S-waves
within 105°: both; 105°–145°: neither; beyond 145°: P only
Section C · long answer
- 6.
Explain how earthquake waves help us understand the earth’s interior.
Answer
Waves change speed and direction in materials of different density; S-waves stop at the liquid outer core, creating shadow zones that reveal the layers.
Fresh sheets for your child
In the app, every Interior of the Earth sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.