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Class 11 The Origin and Evolution of the Earth worksheet
CBSE Social Science. The Big Bang, star and planet formation, light years, and the evolution of the lithosphere, atmosphere, oceans and life. 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 Big Bang is generally accepted to have taken place about:
- 3.8 billion years ago
- 137 million years ago
- 4.6 billion years ago
- 13.7 billion years ago
Answer
(d) 13.7 billion years ago
- 2.
Who is linked with the revised nebular hypothesis of 1950?
- Otto Schmidt and Carl Weizsäcker
- Harry Hess
- Arthur Holmes
- Alfred Wegener
Answer
(a) Otto Schmidt and Carl Weizsäcker
- 3.
What is meant by “differentiation”?
- a vast group of a large number of stars
- small bodies gathering into larger ones
- small bodies that stick together to build planets
- separation of earth materials into layers by density
Answer
(d) separation of earth materials into layers by density
Section B · short answer
- 4.
What is meant by differentiation?
Answer
The separation of earth material into layers by density: heavier iron sank to the centre and lighter material rose.
- 5.
What is meant by each? (a) accretion (b) photosynthesis
Answer
(a) small bodies gathering into larger ones (b) plants making food and releasing oxygen
Section C · long answer
- 6.
Describe the stages of the Big Bang Theory.
Answer
All matter was in a tiny ball of infinite density; it exploded about 13.7 billion years ago and expanded; atoms began to form within minutes; within 300,000 years the temperature fell to 4,500 K and atomic matter formed.
Fresh sheets for your child
In the app, every The Origin and Evolution 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.
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