Basic Concepts
In a nutshell: Energy moves around us by conduction, convection, and radiation, powering life on Earth.
## How Does Energy Move on Earth?
Energy is everywhere! It moves through Earth's systems in lots of ways. The most important source of energy for us is the Sun.
- **Sunlight** gives energy to plants so they can make food.
- **Heat** moves from warm places to cool places (like the Sun warming up the ground).
- **Energy** transfers when animals eat plants or other animals.
## Types of Energy Transfer
- **Conduction**: Heat moves by touching (like your hand warming a cold rock).
- **Convection**: Heat moves through liquids and gases (like warm air rising).
- **Radiation**: Heat moves through space (like sunlight).
## Why Does Energy Transfer Matter?
Energy helps plants grow, animals live, and weather happen! Learning about energy transfer helps us understand weather, food chains, and even how we use electricity at home.
Examples
- Sunlight helping a tree grow and animals eating its fruit for energy.
- A metal spoon getting hot in a bowl of soup through conduction.
Key terms
- Conduction
- Energy transfer by direct contact.
- Convection
- Energy transfer through liquids or gases.
- Radiation
- Energy transfer through space or air.