# Equations

## Understanding Equations

• An equation is a statement showing that two quantities or expressions are equal.

• This involves using symbols, usually letters, to represent specific quantities.

• Equations are a central part of all areas of science and are regularly used to describe the natural world.

## Types of Equations

• Algebraic equations involve variables and constants. They form the basis of algebra.

• Chemical equations show chemical reactions, representing the reactants and products.

• Physics equations are used to describe physical phenomena such as force, energy, or motion.

## Forming and Solving Equations

• To form an equation, you need to understand the relationship between the quantities involved.

• Solving equations involves finding the value or range of values that satisfy the equation.

• Techniques for solving equations can include rearranging terms, factoring, or using specific formulae.

## Application of Equations

• In scientific experiments, equations are often used to calculate values, predict outcomes, or analyse results.

• Understanding equation application can mean recognising which equations are appropriate for a given situation or experiment.

## Limitations and Assumptions

• Every equation includes assumptions or approximations about the quantities involved.

• Understanding these assumptions and potential limitations is an important part of science, allowing for more accurate results and predictions.

## Key Concepts to Remember

• Equations represent relationships between quantities or expressions.

• They can be formed and solved using various methods in algebra, chemistry, and physics.

• Understanding how equations are applied in experiments can improve your scientific analysis skills.

• Recognising any assumptions or limitations in an equation is crucial to achieving accurate results in science.