Energy and the Earth

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.

Front

What is radiant energy?

Back

Radiant energy is the energy of electromagnetic waves, including visible light, which is emitted by the sun and used by plants during photosynthesis.

Front

What is chemical energy?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, which can be released during a chemical reaction.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential and kinetic energy in an object, which is used to do work.

Front

What is the role of a wind turbine?

Back

A wind turbine converts the kinetic energy of wind into mechanical energy, which is then transformed into electrical energy.

Front

What is energy flow in a natural system?

Back

Energy flow in a natural system refers to the transfer of energy through different forms and processes within an ecosystem.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state, which can be converted into kinetic energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, which depends on its mass and velocity.