Photosynthesis Experiment Quiz bio

What is the role of control variables in an experiment?

• To change the outcome

• To keep conditions constant

• To increase variability

• To alter the independent variable

What should be avoided when selecting control variables?

• Relevant variables

• Irrelevant variables

• Consistent variables

• Measurable variables

What is the effect of changing the light intensity in the experiment?

• It alters the temperature

• It changes the rate of photosynthesis

• It affects the type of plant used

• It modifies the amount of water

How does humidity affect the plant in the given scenario?

• It increases growth

• It decreases growth

• It does not affect it

• It causes wilting

What is the independent variable in the beetle population study?

• Beetle species

• Field type

• Time of day

• Temperature

How many quadrats are placed in the meadow field?

• 2

• 3

• 4

• 5

What is the purpose of counting beetles in each quadrat?

• To find the fastest beetle

• To determine the color of beetles

• To find a mean for each field

• To identify beetle species

How can you improve the precision of the practical?

• Use a measuring cylinder with a larger scale

• Use a scale with a small scale (mg)

• Use a balance with a large scale

• Use a measuring cylinder with a larger scale

How can the shape of the potato affect the experiment's validity?

• It changes the surface area to volume ratio

• It changes the color of the solution

• It affects the temperature

• It alters the mass of glucose

What should be used to measure water precisely?

• Beaker with ml scale

• Cup

• Spoon

• Thermometer