Spongebob and his bikini bottom pals have continued doing a little research to solve some
problems. read the description for each experiment and answer the questions.
000
krusty krabs breath mints
mr. krabs created a secret ingredient for a breath mint that he thinks will "cure" the bad breath people
get from eating crabby patties at the krusty krab. he asked 100 customers with a history of bad breath
to try his new breath mint. he had fifty customers (group a) eat a breath mint after they finished
eating a crabby patty. the other fifty (group b also received a breath mint after they finished the
sandwich, however, it was just a regular breath mint and did not have the secret ingredient. both
groups were told that they were getting the breath mint that would cure their bad breath. two hours
after eating the crabby patties, thirty customers in group a and ten customers in group b reported
having better breath than they normally had after eating crabby patties.
1. which people are in the control group? group b
2. what is the independent variable?
3. what is the dependent variable? breath mind
4. what should mr. krabs' conclusion be?
5. why do you think 10 people in group b reported fresher breath?
and they would have besser breath and because
mrokrabs said that they belived him and the
the customers belive they would have better
spongebob clean pants breath
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- detergent, a new brand of 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- detergent did not appear to be any cleaner than the pants washed in plain water.
6. what was the problem spongebob wanted to investigate?
7. what is the independent variable?
8. what is the dependent variable? changing detergent
9. what should sponge bob's conclusion be?