Working Scientifically

Question 1

Control variables

Answer 1

• control variables are the ones you keep the same to make it fair test
• e.g same power of the bulb,same surface area of the plant

Question 2

Independent variables

Answer 2

The thing you decide to change in this case the distance between lamp and potometer distance can be changed

Question 3

Dependent variable

Answer 3

The variable which changes as a result of your independent variable (depend on it)

• it is what you you measure
• in this case the rate of transpiration measured here by the distance marker moved/time distance can be changed

Question 4

Taking measurements

Answer 4

A good experiment will collect evidence which are accurate,precise,reliable,cover the correct range and therefore valid