Explain physical changes in water.

Important Questions on Changes Around Us

MEDIUM

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q F

A change involves energy. Give an example of (i) a change which releases energy (ii) a change which absorbs energy.

MEDIUM

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q F

Breaking of a ceramic mug and burning of paper are changes in which we cannot get back the original substances. What is the difference between these two changes?

HARD

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q F

What is the effect of heating and cooling on some materials? 

MEDIUM

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q G

Give examples to show that when substances are mixed, it may result in a chemical or physical change depending on the conditions.

HARD

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q G

When a candle burns, both physical and chemical changes occur. Explain.

MEDIUM

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q G

Explain the difference between physical and chemical changes

MEDIUM

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q G

Explain the difference between reversible and irreversible changes.

EASY

6th CBSE

IMPORTANT

CANDID New Trends in SCIENCE 6>Chapter 6 - Changes Around Us>TEST YOUR KNOWLEDGE>Q H

Plants prepare their own food by using carbon dioxide and water in the presence of sunlight and chlorophyll.
(a) Is it a chemical change or a physical change?
(b) How many substances are taking part in the change? Name these substances.
(c) Name the form of energy involved in this change.