Variables, Questions, Graphs

What do you call the factors in the experiment that you keep the same in each trial?

• Controlled Variables
• Dependent Variables
• Independent Variables
• Graphs

Why do we use graphs?

• Too add more work
• To visualize the data
• To help determine which variable is which
• To measure the results

Tags

NGSS.MS-PS3-1

Mr. Krabs gave 50 people in Grp A a new mint to eat 2 hrs after eating Krabby patties.  He gave 50 people in Grp B a regular mint to eat 2 hrs after eating Krabby patties.  Then he asked each person if he/she had bad breath.  Which people are in the control group?

• Group A
• Group B

Mr. Krabs gave 50 people in Grp A a new mint to eat 2 hrs after eating Krabby patties.  He gave 50 people in Grp B a regular mint to eat 2 hrs after eating Krabby patties.  Then he asked each person if he/she had bad breath.  Which of the following is a control Mr. Krabs used?

• The mint
• The customers' breath
• The time after eating before using the mint
• The toppings on the Krabby patty

Mr. Krabs gave 50 people in Grp A a new mint to eat 2 hrs after eating Krabby patties.  He gave 50 people in Grp B a regular mint to eat 2 hrs after eating Krabby patties.  Then he asked each person if he/she had bad breath.  What is the independent variable?

• The Krabby Patties
• The breath mint
• The bad breath
• The time after eating the breath is measured

Which of the following is NOT a controlled variable?

• The 2 hr time
• The mint
• The Krabby Patty
• The number of people in each group

Tags

NGSS.MS-PS3-4

Mr. Krabs gave 50 people in Grp A a new mint to eat 2 hrs after eating Krabby patties.  He gave 50 people in Grp B a regular mint to eat 2 hrs after eating Krabby patties.  Then he asked each person if he/she had bad breath.  What is the dependent variable?

• The Krabby Patties
• The breath mint
• The bad breath
• The time after eating the breath is measured

What should the conclusion be?

• The mint helps prevent bad breath.
• The mint does not prevent bad breath.
• There is no difference in those using the mint.
• The mints help digest Krabby Patties

Sandy wants to determine which depth of water produces the biggest flowers.  Which graph would best display her data?

• Bar Graph
• Line Graph
• Pie Graph

Spongebob washed one pair of pants with Clean-O and one pair in his normal soap.  The Clean-O pants did not appear cleaner.  What question was Spongebob investigating?

• Will washing pants make them cleaner?
• Are the pants cleaner?
• Does Clean-O work better than my other detergent?
• Will my pants get cleaner using Clean-O than with my normal detergent?

Tags

NGSS.MS-PS1-2