Study Guide: Energy, Electricity, and the Particle Model of Matter

What is energy?

Energy is the ability to do work or produce change; it exists in various forms including kinetic, potential, thermal, and chemical.

What are the two main types of energy?

The two main types of energy are kinetic energy (energy of motion) and potential energy (stored energy based on position or condition).

What is the law of conservation of energy?

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

What is kinetic energy?

Kinetic energy is the energy an object possesses due to its motion, calculated as $KE = \frac{1}{2}mv^2$ where $m$ is mass and $v$ is velocity.

What is potential energy?

Potential energy is the stored energy of an object based on its position or state, such as gravitational potential energy, which is calculated as $PE = mgh$ where $m$ is mass, $g$ is gravitational acceleration, and $h$ is height.

What is electricity?

Electricity is the flow of electric charge, typically carried by electrons, and is used to power devices and systems.

What are conductors and insulators?

Conductors are materials that allow easy flow of electric charge (e.g., copper), while insulators are materials that resist the flow of electric charge (e.g., rubber).

What is current?

Current is the rate of flow of electric charge, measured in amperes (A), and can be direct (DC) or alternating (AC).

What is voltage?

Voltage, or electric potential difference, is the amount of energy per unit charge, measured in volts (V), that pushes electric charge through a circuit.

What is resistance?

Resistance is the opposition to the flow of electric current, measured in ohms (Ω), and depends on the material, length, and cross-sectional area of a conductor.

What is the particle model of matter?

The particle model of matter states that all matter is made up of tiny particles that are in constant motion and interact with each other.

What are the states of matter?

The states of matter include solids, liquids, and gases, which differ in particle arrangement, movement, and energy.

What is temperature in relation to particle motion?

Temperature is a measure of the average kinetic energy of particles in a substance; higher temperatures correspond to faster particle motion.

What is diffusion?

Diffusion is the process by which particles spread from an area of high concentration to an area of low concentration due to random motion.

What is the difference between a molecule and an atom?

An atom is the smallest unit of an element, while a molecule consists of two or more atoms bonded together.