Q1
What is energy?
AThe ability to do work
BA type of matter only
CA type of force only
DNothing specific
ICSEClass 7 (ICSE)ScienceCh 3 · Topic 1
Energy
Energy is the ability to do work, existing in various forms like kinetic, potential, and can be transformed from one form to another.
Core concept
Kinetic energy is the energy of motion, like a moving car or a rolling ball, increasing with speed and mass.
How it works
Potential energy is stored energy due to position or condition, like a book on a shelf (gravitational) or a stretched rubber band (elastic).
Why it matters
Energy can be transformed from one form to another, like potential energy converting to kinetic energy when an object falls.
Key detail
The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.
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• Energy is the ability to do work.
• Kinetic energy is the energy of motion.
• It increases with speed and mass.
• Potential energy is stored energy.
• Examples: a book on a shelf, a stretched rubber band.
• Energy transforms between forms.
• Falling objects convert potential to kinetic energy.
• Energy conservation law: energy is never created or destroyed.