Recall Practice

Something you notice or measure, using your senses or equipment.

An idea that explains something and can be tested.

The steps you follow, in order, to collect your results.

Your answer to the question, using your results as evidence.

Observations or measurements that help answer a question.

An observation is what you notice or measure. An explanation says why it happened.

The smallest to the biggest value it can measure.

The smallest change an instrument can show.

Read the scale with your eye level with the mark, looking straight at it.

A balance.

A measuring cylinder.

How much air mixes with the gas.

The yellow safety flame.

It can still be very hot, even though it looks the same as cold glass.

Yellow.

A heatproof mat.

A test where you change one thing and keep the other important things the same.

When they cannot change the thing themselves, so they measure and look for a pattern.

You can answer it by observing or measuring something.

A test that compares two or more things or groups, such as different types of paper towel.

Using data or information that other people have collected, such as books, websites or databases.

The independent variable.

The dependent variable.

So only the independent variable can be causing the change in the results.

The variable you measure.

A comparison group that does not get the change being tested, so you can see what happens without it.

The type of harm a substance can cause.

A serious or long-term health hazard.

The corrosive symbol.

It does not say exactly what to do to stop harm.

Something that could cause harm.

How likely it is that the hazard causes harm, and how bad the harm would be.

A clear rule for exactly how you will measure something.

Whether your results really answer the question you asked.

You can answer it with the time and equipment you have.

It can be answered by collecting evidence, such as observations or measurements.

It asks for an opinion. “Nicest” cannot be measured in the same way by everyone.

A small practice run to check your method works before the real investigation.

So you know what to measure, the units and how many repeats to take.

How much the results vary when you do the same thing again.

The exact moment you stop timing or measuring, decided before you start.

The gap between the values of the independent variable, such as every 10 °C.

The first column.

In the column heading, like “time / s”.

Numbers you work out from your results, such as a mean.

The measurements you actually record during the investigation.

A result that does not fit the pattern of the others.

Add up the values, then divide by how many values there are.

When one variable is in groups or categories, such as types of material.

Two things change together. It does not prove that one causes the other.

When both variables are numbers, such as temperature and time.

A smooth line or curve that follows the general pattern of the points.

It makes them spread out in an unpredictable way.

It makes every result wrong by about the same amount, in the same direction.

It fixes a named problem and is possible to do.

A weakness in an investigation that makes the results less trustworthy.

Repeat the measurements and calculate a mean.

Answering from memory before looking at your notes.

Coming back to an idea after a gap.

Fix the exact mistake, then try again later.

Mixing different types of questions in one practice session.

Information that tells you what was right, what was wrong and how to improve.