Electrical power is the rate at which electrical energy is transferred by an electric circuit. It is measured in watts (W) and is the product of voltage (V) and current (I) in a circuit.

**Voltage:**The force that moves electric charges through a conductor. It is measured in volts (V).**Current:**The flow of electric charges through a conductor. It is measured in amperes (A).**Power:**The rate at which electrical energy is transferred by an electric circuit. It is measured in watts (W).**Formula:**Power (P) = Voltage (V) x Current (I)

To calculate the electrical power in a circuit, you can use the formula: **P = V x I**, where P is the power in watts, V is the voltage in volts, and I is the current in amperes.

In addition to watts, electrical power can also be measured in kilowatts (kW) and megawatts (MW) for larger electrical systems.

Electrical power is used for various applications, including lighting, heating, cooling, and powering electronic devices.

- Understand the relationship between voltage, current, and power.
- Practice solving power calculations using the formula P = V x I.
- Explore real-world examples of electrical power usage in different devices and appliances.
- Review the units of power and their conversions (watts to kilowatts to megawatts).

Study GuideEarth's energy resources Worksheet/Answer key

Earth's energy resources Worksheet/Answer key

Earth's energy resources Worksheet/Answer key

Earth's energy resources Vocabulary/Answer key

Earth's energy resources

EARTH AND SPACE SCIENCE

Earth’s Systems

Use research-based evidence to propose a scientific explanation regarding how the distribution of Earth’s resources such as minerals, fossil fuels, and groundwater are the result of ongoing geoscience processes (e.g., past volcanic and hydrothermal activity, burial of organic sediments, active weathering of rock).

Earth and Human Activity

Analyze evidence (e.g., databases on human populations, rates of consumption of food and other natural resources) to explain how changes in human population, per capita consumption of natural resources, and other human activities (e.g., land use, resource development, water and air pollution, urbanization) affect Earth’s systems.