scientific method-7th grade

A possible explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group
• control group
• data
• variables

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

On what axis should the independent variable always be?

• X
• Y

What is the group in an experiment that receives treatment with the independent variable?

• control group
• experimental group
• constant group
• variation group

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

SpongeBob noticed that his favorite pants were not as clean as they used to be.  His friend Sandy told him that he should try using Clean-O detergent, a new laundry soap she found at Sail-Mart.  SpongeBob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent.  After washing both pairs of pants a total of three times, the pants washed in the Clean –O detergent did not appear to be any cleaner that the pants washed in plain water. What is the control?

• Type of detergent
• Pant washed in Clean-O detergent
• Pant washed in plain water
• Water

SpongeBob noticed that his favorite pants were not as clean as they used to be.  His friend Sandy told him that he should try using Clean-O detergent, a new laundry soap she found at Sail-Mart.  SpongeBob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent.  After washing both pairs of pants a total of three times, the pants washed in the Clean –O detergent did not appear to be any cleaner that the pants washed in plain water. What is the dependent variable?

• Type of pants
• Type of detergent
• Cleanliness of the pant
• Water