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Unit 1- RETAKE Experiment Design Quiz

Last updated over 4 years ago

11 questions

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Question 1

1.

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.)

Exercise before school
Grades
Last semester
Number of classes

Independent Variable (1)
Dependent variable (1)

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).

Average number of birds
Amount of each type of seed
Time of year
Type of Seed

Independent Variable
Dependent Variable
Control Variables

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?

How much time each dog spends itching

How many fleas they have

How much the medicine costs

How long the poodles' hair is

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?

size of fish at the start, amount of food, type of fish

size of fish at the end, size of tank, purity of water

type of fish, name of fish, size of tank

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?

Give chicken #1 no added calcium, chicken #2 one tablespoon calcium powder and chicken #3 two tablespoons calcium powder. Measure each chicken's eggs.

Give all three chickens no calcium for week one, then add calcium powder to their diet for week two.  Week three, collect and measure each chicken's eggs.

Give chicken #1 no added calcium, chicken #2 one tablespoon added calcium powder and chicken #3 one tablespoon milk. Measure each chicken's eggs.

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?

If people eat fruits and vegetables, they will lose weight.

If people get Covid-19, they should eat fruits and vegetables more often.

If people eat fruits and vegetables, they will have stronger immune systems to fight the Covid-19 virus.

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?

A study links watching television with poor diet and decreased exercise.

A study links playing video games with lower obesity rates in children.

The American Pediatrics society advises against screentime before the age of 6.

The World Health Organization cites that time on social media is linked with decreased mental health in teens.

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?

She didn't include an independent variable.

She studied the words for a different amount of time.

She used a different set of words for the two methods.

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:

Survey the class to determine how extroverted they are. Record for how many classes each student leaves their camera on over 2 weeks.  Graph both variables and look for a pattern.

Ask half the class to turn their cameras on, and half to turn it off.  After class, ask them to take a survey to measure how extroverted they are.

Find 2 classmates that appear extroverted.  Record whether their camera is on or off.  Use this to determine if your hypothesis was correct.

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?

Yes, because her running speed was quickest with the apple, and slowest with the Gatorade.

Yes, because apples are the healthiest food of the three variables.

No, because she didn't write down her dependent variable.

No, because she didn't control for tiredness.  She should have done the tests on different days.

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....