Identify this step of the scientific method. Bob read about growing plants in water. He wanted to know how plants could grow without soil.

• coming up with a question

• test the hypothesis with an experiment

• form a hypothesis

• draw conclusions

Identify this step of the Scientific Method. Susan said, “If I fertilize my geranium plants, then they will have more flowers.”

• recognize a problem

• test the hypothesis with an experiment

• form a hypothesis

• draw conclusions

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

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, what are the controlled variables?

• Type of plant, amount of music, and sunlight
• Water, apple juice, milk
• Plant growth

"The plant is pretty"
This observation is...

• Subjective
• Objective

"The coin weighs 2 grams"
This observation is...

• Subjective
• Objective

Ms. Kent is probably not in school today because she is sick. Is this a Qualitative Observation, Quantitative Observation, or an Inference

• Qualitative Observation

• Quantitative Observation

• Inference

Should experiments be repeated over and over to see if the results are the same each time?

• yes
• no

I want to know if low strength bleach, medium strength bleach, or maximum strength bleach will get Heinz ketchup stains out of white T-shirts the best. What is the independent variable in this experiment?

• the type of stain

• the strength of the bleach

• the color of shirt

• the brand of ketchup

The plastic bottle holds two liters of soda. Is this a Qualitative Observation, Quantitative Observation, or an Inference

• Qualitative Observation

• Quantitative Observation

• Inference