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Josie was performing an experiment where she grew the same kind of tomatoes in the same soil and amount of water.  She sat one in the sun and one in a closet for 14 days.  What is the independent variable in Josie's experiment?

• tomatoes
• soil
• sunlight
• water

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the dependent variable.

• height of the ramp
•  distance traveled by the ball
• mass of the ball
• weight of the ball

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

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the independent variable.

• distance traveled by the ball
• height of the ramp
• mass of the ball
• weight of the ball

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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. What variables should be kept constant? 

• type of plant, flower pot,  soil, and amount of sunlight
• water, apple juice, milk
• only the amount of sunlight
• type of plant only

Observations made during an experiment are considered:

• data
• problems
• conclusions
• questions

Jane Goodall recorded 40 chimps living in a community, this is ____ data.

• quantitative
• qualitative
• observation
• field study

Jane Goodall recorded chimpanzees hunt bushpigs, this type of data is called ___

• qualitative
• quantitative
• field study
• observation

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

A scientist is planning to carry out an experiment on the affect of temperature on bacteria growth. Which would NOT be an appropriate first step?

• Doing research in a library about bacteria
• Having discussions with other scientists
• Completing a data table with expected results
• Looking at past experiments