The Ever Evolving World of Science Class 7 MCQ Questions Science Chapter 1

Question 1.
Which of the following is NOT a major branch of science?
(a) Biology
(b) Chemistry
(c) Astrology
(d) Physics
Answer:
(c) Astrology

Question 2.
Which activity is an example of a reversible change?
(a) Burning wood
(b) Melting ice
(c) Cooking rice
(d) Rusting of iron
Answer:
(b) Melting ice

Question 3.
What is the first step in learning science according to the lesson?
(a) Conducting experiments
(b) Observing things
(c) Writing reports
(d) Using technology
Answer:
(b) Observing things

Question 4.
Which sense is NOT commonly used in making scientific obser¬vations?
(a) Sight
(b) Taste
(c) Smell
(d) Touch
Answer:
(b) Taste

Question 5.
What kind of change is rusting of iron?
(a) Reversible change
(b) Irreversible chemical change
(c) Physical change
(d) Temporary change
Answer:
(b) Irreversible chemical change

Question 6.
Which of the following is an example of a physical change?
(a) Burning paper
(b) Folding a paper
(c) Cooking an egg
(d) Souring of milk
Answer:
(b) Folding a paper

Question 7.
Why is curiosity important in science?
(a) It saves time
(b) It avoids mistakes
(c) It leads to discoveries and new ideas
(d) It helps memorize facts
Answer:
(c) It leads to discoveries and new ideas

Question 8.
How did the invention of airplanes get inspired?
(a) From clouds
(b) From trees
(c) From birds flying
(d) From the wind
Answer:
(c) From birds flying

Question 9.
Which of the following is a characteristic of a chemical change?
(a) It forms a new substance
(b) It is always reversible
(c) It involves only physical properties
(d) It has no effect
Answer:
(a) It forms a new substance

Question 10.
What is Earth Science the study op
(a) Plants and animals
(b) Chemicals and atoms
(c) Land, water, air, and weather
(d) Machines and inventions
Answer:
(c) Land, water, air, and weather