year 8 Michaelmas exam paper 2

What is the independent variable?

The variable you change

What is the dependent variable?

The variable you measure

What are control variables?

Factors kept the same for a fair test

Why wear safety goggles?

To protect your eyes

What should you do if you spill a chemical?

Tell the teacher immediately

Why keep bags under desks?

To prevent tripping hazards

What measures liquid volume?

Measuring cylinder

What heats substances?

Bunsen burner

What measures mass?

Balance

Why repeat measurements?

To improve reliability

Unit for length?

Metres (m)

How to avoid parallax error?

Read scale at eye level

What is an anomaly?

A result that doesn’t fit the pattern

Why calculate averages?

To reduce random errors

What is qualitative data?

Descriptive data (e.g.

Which variable goes on the x-axis?

Independent variable

Which variable goes on the y-axis?

Dependent variable

Why use a line of best fit?

To show the trend

Why change only one variable?

To ensure a fair test

What should a hypothesis include?

A prediction with reasoning

Why are repeats important?

They make results reliable

What does accuracy mean?

How close a measurement is to the true value

What does precision mean?

How close repeated measurements are to each other

What does reliability mean?

Whether results are consistent when repeated