Planning An Investigation

Question 1

Kinetic energy

1 mark

Answer 1

Energy which an object possesses by being in motion.

Question 2

Variables

3 marks

Answer 2

• Independent Variable
• Dependent Variable
• Controlled Variable

Question 3

Independent variable

1 mark

Answer 3

The variable that is altered during a scientific experiment.

Question 4

Dependent variable

2 marks

Answer 4

the variable being tested or measured during a scientific experiment.

Question 5

Controlled variable

1 mark

Answer 5

A variable that is kept the same during a scientific experiment.

Question 6

Change in a controlled variable would

1 mark

Answer 6

Invalidate the results.

Question 7

Hypothesis

5 marks

Answer 7

Or prediction is made with limited evidence at the beginning of a scientific investigation

• Biological knowledge should be used to justify the prediction.

Question 8

Risk Assessment

2 marks

Answer 8

A careful examination of what could cause harm to people during a scientific investigation.

Question 9

Hazard

2 marks

Answer 9

Anything that may cause harm, such as chemicals, electricity, extreme heat etc.

Question 10

Risk

2 marks

Answer 10

The chance, high or low, that somebody could be harmed by hazards identified.

Question 11

Risk Prevention Methods

1 mark

Answer 11

Strategies put in place to avoid any injuries.

Question 12

Controlled Experiments are

3 marks

Answer 12

Necessary for comparison purposes + proves that any change in the results is due to the independent variable being altered.

Question 13

Accuracy of a measurement is dependent on

2 marks

Answer 13

The quality of the measuring apparatus + the skill of the scientist involved.

Question 14

Risk of Iodine

2 marks

Answer 14

Irritation of the eyes/skin

Question 15

Prevention of eye irritation caused by chemicals such as Iodine

(1 mark)

Answer 15

Wear goggles

Question 16

Diagrams

1 mark

Answer 16

Drawn to show the setup of the equipment being used.

Question 17

Any data collected from a scientific investigation should be recorded in a results table

(1 mark)

Answer 17

Recorded in a results table.

Question 18

A results table needs to include:

7 marks

Answer 18

• Appropriate headings + units (written in the column heading only).
• All data collected, any repeats obtained.
• Appropriate calculations (e.g. average).