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Test: Changes Around Us - Class 6 MCQ


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5 Questions MCQ Test Science Olympiad Class 6 - Test: Changes Around Us

Test: Changes Around Us for Class 6 2024 is part of Science Olympiad Class 6 preparation. The Test: Changes Around Us questions and answers have been prepared according to the Class 6 exam syllabus.The Test: Changes Around Us MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Changes Around Us below.
Solutions of Test: Changes Around Us questions in English are available as part of our Science Olympiad Class 6 for Class 6 & Test: Changes Around Us solutions in Hindi for Science Olympiad Class 6 course. Download more important topics, notes, lectures and mock test series for Class 6 Exam by signing up for free. Attempt Test: Changes Around Us | 5 questions in 5 minutes | Mock test for Class 6 preparation | Free important questions MCQ to study Science Olympiad Class 6 for Class 6 Exam | Download free PDF with solutions
Test: Changes Around Us - Question 1

Observe the given figure carefully and select the correct statement.

Detailed Solution for Test: Changes Around Us - Question 1

Processes (i) and (ii) involve absorption of heat energy while processes (iii), (iv) and (v) involve evolution of heat energy.

Test: Changes Around Us - Question 2

Swati classified a few changes occurring around us as shown in the table.

Which of the changes is/are classified correctly?

Detailed Solution for Test: Changes Around Us - Question 2

Sharpening of pencil - Physical, irreversible change
Evaporation of water - Physical, reversible change
Photosynthesis - Chemical, irreversible change
Rusting of iron - Chemical, irreversible change

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Test: Changes Around Us - Question 3

Read the given flow chart carefully and fill in the blanks by choosing an appropriate option.

Identify P, Q, R and S.

Detailed Solution for Test: Changes Around Us - Question 3

:Blowing of a balloon and drying of wet clothes are examples of physical, reversible changes as both these changes do not involve any change in the composition and can be reversed. Tearing of paper and cutting of tree are physical changes that cannot be reversed. Hardening of cement and baking of a cake involve chemical reactions, and are thus chemical changes. Sunrise-sunset and low-high tides are examples of periodic changes as these changes occur at regular intervals.

Test: Changes Around Us - Question 4

Study the given Venn diagram and identify points 1, 2 and 3.

Test: Changes Around Us - Question 5

Study the given Venn diagram.

If 1 represents slaking of lime and 2 represents decomposition of calcium carbonate then P, Q and R could be respectively.

Detailed Solution for Test: Changes Around Us - Question 5

Decomposition of calcium carbonate is an endothermic, chemical change as calcium carbonate breaks into calcium oxide and carbon dioxide by absorption of heat. Slaking of lime releases a lot of heat hence, it is an exothermic, chemical change.
Therefore, P should be ‘exothermic’, Q should be 'endothermic' and R should be chemical change.

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