Sonja wants to test whether exercising before school improves her grades. She decides to exercise everyday next semester, and compare her grades with the previous semester. Select her independent and dependent variable. (Drag one item for each category.)
Number of classes
Exercise before school
Last semester
Grades
Independent Variable (1)
Dependent variable (1)
4 points
4
Question 2
2.
Greg placed different types of seed in his backyard bird feeders to determine which kind was most preferred. He graphed the results above. Identify the independent, dependent and control variables. (Drag each item to its correct category).
Amount of each type of seed
Time of year
Average number of birds
Type of Seed
Independent Variable
Dependent Variable
Control Variables
1 point
1
Question 3
3.
Julian wants to know which brand of flea medicine works better on his pet poodles. He gives one poodle a dose of Flea-B-Gone and the other poodle a dose of De-Flea-It. Which piece of data is most important to collect?
1 point
1
Question 4
4.
Mia asked the question, "Does the size of a fish tank affects the size of my pet goldfish?" She placed the first goldfish, Bubbles, in a one gallon tank and the second fish, Cuddles, in a two-gallon tank. Which list below describes important variables to control to make sure the experiment is fair?
1 point
1
Question 5
5.
Erin wants to know, "Does the amount of calcium I give my chickens affect how big their eggs are?" Which of these experiment set-ups should she choose?
1 point
1
Question 6
6.
Dr. Chan wants to know, "Does eating fruits and vegetables decrease risk of getting Covid-19?" Which of these hypotheses would be a logical prediction to her question?
1 point
1
Question 7
7.
Zach wants to test the relationship between kids' screentime and weight. He hypothesizes: The more time a person spends on a screen daily, the more likely they are to be overweight. Which piece of background research would best support his hypothesis?
1 point
1
Question 8
8.
Meg wants to figure out which method will help her learn new vocab for Spanish class: flash cards or drawing pictures? She writes half her words on flashcards and practices them for 10 minutes. She practices the other half of her vocab words by sketching pictures of them for 5 minutes. Finally, she takes a quiz on all the words to compare how many of each list she got correct. What error did she make?
1 point
1
Question 9
9.
Brian wants to know: Is there a link between how extroverted (social) students are and whether they leave their video camera on during Zoom calls? Choose which experiment will best test this question:
1 point
1
Question 10
10.
Andy wants to determine what snack will help her run fastest. On Tuesday, she eats an apple and runs a mile in 7 minutes, then eats cookies then runs another mile in 8 minutes, and finally drinks a Gatorade and runs a mile in 8 minutes 45 seconds. She concludes that apples are the best food for running. Is this a logical conclusion?
2 points
2
Question 11
11.
Jim wants to know why his cell phone runs out of battery so quickly, and notices that it is especially bad when he plays games on it. Write a hypothesis to guide an experiment. My hypothesis is that if....