Scientific Inquiry

You are doing an experiment recording the growth of plants under different amounts of sunlight. What is the dependent variable?

• The sunlight
• The growth
• The experiment
• The amounts of photons

The variable that causes a change is the

• constant
• independent variable
• dependent variable
• control

The variable that is the result of the experiment is the 

• constant
• independent variable
• dependent variable
• control

A variable that never changes is known as a 

• constant
• independent variable
• dependent variable
• control

"Will ice melt faster in salt water?", is an example of a

• Hypothesis
• Question
• Dependent variable
• Control

"Ice will melt faster in salt water.", would make a good

• Hypothesis
• Question
• Analysis
• Conclusion

What is the independent variable for the hypothesis: If ice melts in salt & fresh water, then it will melt faster in salt water.

• The amount of water
• The melt time
• The size of the ice cube
• The amount of salt

What is the dependent variable for the hypothesis: If ice melts in salt & fresh water, then it will melt faster in salt water.

• The melt time
• The amount of salt
• The fresh water
• The size of the beaker

What is a constant variable for the hypothesis: If ice melts in salt & fresh water, then it will melt faster in salt water.

• The amount of salt
• The melt Time
• The fresh water.
• The temperature of the water

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs