4.The word for “machine” comes from the Greek word meaning “to help make things easier.” Levers, gears, pulleys, wedges, and screws are some examplesof machines.
5.The energy that is stored in the food we eat isstored as chemical energy. For example, sugar and fat both have a lot of chemical energy storedin them.
Energy is the ability to do work
levers, pulley are examples of simple machines
The food we eat also has stored energy
Answer:
3.Energy is the ability to do work.
4.The word for “machine” comes from the Greek word meaning “to help make things easier.” Levers, gears, pulleys, wedges, and screws are some examplesof machines.
5.The energy that is stored in the food we eat isstored as chemical energy. For example, sugar and fat both have a lot of chemical energy storedin them.