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WorksheetsWorking scientifically
Total questions: 24
Worksheet time: 48mins
What is a control variable?
the variable that you change or select the values for
the variable that you measure or observe to get your results
a variable that must remain the same throughout an investigation
A student is investigating if salt is more soluble than sugar in 100 ml water at 20 °C.
In this investigation, what type of variable is the volume of water (100 ml)?
independent variable
dependent variable
control variable
A student is investigating how the height of the ramp affects the distance from the ramp that a marble travels. Select two control variables for this investigation.
distance from the ramp that a marble travels
mass of the marble
height of the ramp
surface material of the ramp
An independent variable is . . .
the variable that you change or select the values for.
a variable that must remain the same throughout an investigation.
the variable that you measure or observe to get your results.
What is the dependent variable in an investigation?
the variable that you measure or observe to get your results
a variable that must remain the same throughout an investigation
the variable that you change or select the values for
What is the dependent variable in this investigation?
length of the wire
resistance of the wire
material of the wire
What is the dependent variable in this investigation?
force applied to the spring
extension of the spring
What is a hypothesis?
information gathered by your senses
what you think the outcome of an investigation will be
a scientific idea that you can test
What is a hazard?
how likely something is to be harmful
something that presents possible danger
an action taken to remove or reduce exposure to
something that could be dangerous
What is a risk?
how likely something is to be harmful
something that presents possible danger
an action taken to remove or reduce exposure to a hazard
How many more people have purple for a favorite color than red?
3
5
7
9
What is the volume on the measuring cylinder?
22
24
21
23
what does this safety symbol mean?
flammable
light on fire
get the fire extinguisher
can burn your skin
Which piece of scientific equipment is used to observe cells?
telescope
microscope
magnifying glass
thermometer
What is the independent variable in this investigation?
type of antacid
change in pH
volume of acid
What is the dependent variable in this investigation?
type of antacid
change in pH
volume of acid
What is meant by the range of a variable?
the difference between the maximum and minimum values of the variable
the difference between two consecutive values of the variable
What is meant by the interval of a variable?
the difference between the maximum and minimum values of the variable
the difference between two consecutive values of the variable
The independent variable in this investigation was the distance from the lamp to the pondweed. What was the interval of the distances that were studied?
40
10
50
25
The table shows the results of an investigation into the effect of light intensity on the rate of photosynthesis. What range of distances from the lamp to the pondweed was investigated?
40
10
50
25
In this investigation, the independent variable is length of the wire. Which range and interval would be most suitable to investigate?
10–20 cm with 5 cm intervals
10–100 cm with 10 cm intervals
10–20 cm with 2 cm intervals
