A method describes how an experiment is carried out; a step-by-step procedure.

Command words are words or phrases that indicate what you are expected to do.  They are usually imperative verbs.

When the same person uses the same method and obtains the same / similar results when repeating the experiment.

When a different person uses the same/similar method as another and obtains the same / similar results as that other person.

Dissolving: scientific methods

Science

Pure substances

Mixtures: choosing equipment

Mixtures: equipment diagrams

Mixtures and solutions

Diffusion

Dissolving

Variables

Solubility: practical

Solubility: analysis

Saturated solutions

In the Separation Techniques unit, pupils will build on their knowledge of solutions to learn about methods for separating mixtures, including filtration, evaporation, distillation, and chromatography.

In the Solid, Liquid and Gas States and Changes of State unit, pupils learned to categorise substances into the solid, liquid or gas state and explored particle behaviour during changes of state.

This unit explores the concepts of pure substances, mixtures, and diffusion in liquids and gases. It emphasises accuracy, precision, and the use of appropriate techniques during investigations. The focus is on making predictions and recording reliable observations.

Solutions

Physical activity and equipment requiring safe use

Risk assessment required - physical activity

To look at and study something carefully.

To determine the size, quantity, or amount of something.

To write down or take note of data or observations.

Match the command word to its meaning in a scientific method:

The term for when the similar results are obtained by different people using the same method is...

Why is it important to use command words in a scientific method?

A {{}} describes how an experiment is carried out; a step-by-step procedure.

choosing appropriate equipment and using it correctly

ensuring the method is clear and easy to follow

ensuring the method will allow for repeatable and reproducible results

ensuring the largest amount of each substance is used

changing the method slightly each time to get better results

When gathering results from an experiment, it’s important to be confident they are as good as can be. This can be achieved by:

After completing an investigation you've collected multiple results. When calculating your average result any inconsistent results can be ignored, such as the result "47.3" in this table.

What is the first step in a scientific investigation?

Involves hands-on activities to investigate

Involves collecting information and results

Match the scientific process to its description:

Which of these is essential for a fair test in a scientific experiment?

Match each piece of apparatus to its use.

In a scientific investigation, a hypothesis is a guess that doesn't need to be based on previous knowledge.

The process of categorising objects or events based on common traits is called...

Starter Quiz

What is the first step in a scientific investigation?