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Class 7 The Ever-Evolving World of Science worksheet
CBSE Science. Science as a process: questions, observations, hypotheses, fair tests and the branches of science. 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.
Science is best described as:
- a subject only for laboratories
- guessing without checking
- a fixed list of facts
- a process of asking questions and finding answers by observing and testing
Answer
(d) a process of asking questions and finding answers by observing and testing
- 2.
A scientist studying why iron rusts mainly works in:
- earth and space science
- physics
- chemistry
- biology
Answer
(c) chemistry
- 3.
Which of these is an OBSERVATION?
- the leaf may need light to make food
- the Sun may be highest at noon
- the gate may rust faster in the rainy season
- the lime water turned milky
Answer
(d) the lime water turned milky
Section B · short answer
- 4.
Why is science called a process and not just a set of facts?
Answer
Because it is a way of asking questions, testing ideas and changing them with new evidence.
- 5.
Which branch of science (physics, chemistry, biology or earth and space science) studies (a) how a pendulum swings (b) why we have seasons?
Answer
(a) physics (b) earth and space science
Section C · long answer
- 6.
Explain with an example how a scientist investigates a question.
Answer
For example, "Why does bread go mouldy?" They observe, guess that moisture helps mould grow, test by keeping one slice dry and one damp, record what happens and conclude. If the guess is wrong, they try a new one.
Fresh sheets for your child
In the app, every The Ever-Evolving World of Science 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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