PS HW 7-2 Experimental Design

What is the effect of salt water on the average of the height of the 3 tallest blades of grass?
What is the independent variable in the above question?

• salt water
• height
• average
• effect

What is the effect of salt water on the average of the height of the 3 tallest blades of grass?
What is the independent variable in the above question?

• salt water
• height
• average
• effect

What is an if....then statement that predicts the outcome of an experiment or how the Independent variable effects the dependent variable?

• Conclusion
• Materials
• Hypothesis
• Problem

What is the part of the experiment that contains the independent variable?

• control group
• experimental group
• hypothesis
• dependent variable

What are the number of times each level of the independent variable is tested?

• constants
• control 
• repeated trials
• dependent variable

Jeff is 6 feet 2 inches is a ___________ assesment

• Qualitative
• Quantitative

The cake has a sweet smell is a _______ assessment. 

• Qualitative
• Quantitative

Kenya designed an experiment to answer the following question: How does the amount of water given to a lima

bean seed affect how tall it grows?

In this experiment, what variable should Kenya CHANGE?

• the amount of water

• the kind of plant

• the type of soil

• the amount of sunlight it gets

Kenya designed an experiment to answer the following question: How does the amount of water given to a lima

bean seed affect how tall it grows?

Multiple answer!!!! Which things does Kenya need to keep the same in her experiment?

• the amount of water each plant gets

• the amount of soil

• the type of plant

• the amount of sunlight each plant gets

Brandon & Keyvion designed an experiment to answer the following question: How does the temperature of water affect the time it takes for a sugar cube to dissolve?

Which factor should they CHANGE in his experiment with the sugar cubes?

• the amount of water he uses

• the size of the sugar cubes

• the temperature of the water

• the type of glass