Sec 1 Sci CH1 Quiz 1

It is a kind of experiment in which one condition (independent variable) affects another (dependent variable) by keeping all the conditions constant.

The common qualities of a controlled experiments are :

• Testable questions

• Research

• Developing Hypothesis

• Avoid Bias

• Designing Experiment to test the hypothesis

Name the INDEPENDENT variable from the table below.

• words
• minutes

Amy wished to investigate if the amount of fertilizer improved the growth of plants. What kind of variable is the amount of fertilizer?

• independent variable

• dependent variable

• controlled variable

You are testing how the amount you water a plant affects its growth. What would be the INDEPENDENT VARIABLE in this experiment.

• They type of pot you put the plants in.

• The amount you water each plant.

• The amount of sunlight the plants get.

• The amount the plant grows.

The variable that is measured. It is the result of the experiment.

• Controlled Variable

• Dependent Variable

• Independent Variable

It is a simple statement that presents the possible solution to the problem.

• hypothesis

• experiment

• conclusion

• variables

Mr. Pransky wants to see how different surfaces affect how high a tennis ball can bounce. What is the independent variable?

• the different surfaces

• the type of ball used

• how high they bounce

A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease (go down)." What is the independent variable?

• Whether salt is added or not

• Boiling Point

• Amount of water

The amount of water, amount of sunlight, and kind and initial size of the plants is what kind of variables?

• controlled variables

• dependent variables

• independent variables

• (not enough information to tell)