Coal is a type of rock used as fuel. People burn it to get energy and heat. It often comes from the earth under the ground.
The factory uses coal for heat.
Coal is burned to make electricity.
This meaning is about small parts of coal. People put these pieces on fires to keep warm or cook food.
She added coal to the fire.
The stove burns small coal pieces.
In a fun way, coal means a bad gift at Christmas. If a child is not good, they get coal instead of toys. It is a way of saying 'you were naughty.'
He got coal for Christmas this year.
Children who are naughty receive coal gifts.
Coal as an adjective means very dark or black color. It is often used to describe things that are deep black like coal rock.
She wore a coal-colored dress.
The cat has coal black fur.
Coal in geology is a rock made long ago from plants. It takes millions of years to form underground under pressure and heat.
Coal forms under pressure in fossil beds.
Geologists study coal to learn earth history.
Coal can mean a bad thing that hurts reputation. It is a metaphor for a mark or a problem someone has because of past actions.
He has coal on his career record.
The mistake left coal on her name.
