Using energy
Using energy means taking energy from a source (like the Sun, electricity, or food) and using it to do work, move things, or make something happen.
Interesting Points
Energy is never lost; it only changes form (like electrical → light).
Your body is like a machine that runs on food energy.
Even when you sit quietly, your body still uses energy to breathe and think.
Plants use sunlight energy to make their own food.
The Sun gives more energy in one second than humans use in a whole year!
A torch uses chemical energy inside the battery to make light energy.
Main Points
Energy is needed to do any kind of work—big or small.
We use different types of energy: light, heat, sound, electrical, and food energy.
Most energy on Earth comes from the Sun.
Machines and appliances need electrical energy to work.
Humans need food energy to run, play, think, and grow.
Without energy, nothing can move or happen.
Fun Fact:
The Sun is so powerful that it gives Earth energy every second—more than we could ever use!