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Question
Name the following.
A form of energy required for a chemical change.
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Solution
Generally, HEAT ENERGY is required but light, pressure, or electricity can also be needed.
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RELATED QUESTIONS
Write true or false for the statement.
Deforestation is a man-made change
Solve this crossword by using the clues that follow.

Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change
What is a chemical change ? Give two examples of chemical changes.
Given reason:
Burning of paper is a chemical change.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
Select the chemical changes from the following list of changes
Change of seasons
When solute is dissolved in a solvent it forms a solution.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Keeping a stone in sunlight for few hours is ______.
