Two kids decide to test if drinking caffeine increases their heart rate. They both test their resting heart rate, and drink a cup of coffee, then remeasure their heart rates an hour later. Select their independent and dependent variable. (Drag to the correct category).
Heart rate
Size of the cup of coffee
Coffee or no coffee
The two kids
Independent Variable
Dependent variable
4 points
4
Question 2
2.
This graph shows the results of an experiment. Identify the independent, dependent and control varaiables. (Drag each item to its correct category).
Height of Plants
Type of Fertilzer
Amount of Sunlight
Amount of Soil
Independent Variable
Dependent Variable
Control Variables
1 point
1
Question 3
3.
Ari and Elyse were playing basketball after school. They noticed that one of their basketballs has lower air pressure compared to the other. They decide to do an experiment to test if the difference in air pressure affects their free throw shooting percentage. Which piece of data is most important to collect?
1 point
1
Question 4
4.
Al and Dan go sledding on a hill in their neighborhood, and ask the question What happens to sled speed when we start lower or higher on the hill? Which list below describes important variables to control to make sure the test is fair?
1 point
1
Question 5
5.
Farmer Bob wants to grow the largest pumpkins possible. He decides to conduct an experiment to see: What quantity of compost results in the largest pumpkins? He plants three rows of pumpkin seeds for the experiment. Which of these experiment set-ups should he choose?
1 point
1
Question 6
6.
Erin wants to know "Will my science students score better on a quiz before lunch or after lunch?" Which of these hypotheses would be a logical prediction to her question?
1 point
1
Question 7
7.
Carmen wants to test the relationship between playing video games and kids' athletic skills. She hypothesizes: If kids play more than an hour of video games per day, they will make more soccer goals out of 3 attempts. Which piece of background research would best support her hypothesis?
1 point
1
Question 8
8.
Ben wants to know: Do middle schoolers study better at night or in the morning?" He finds a one-minute math facts quiz online. He asks his friend Lisa to take the quiz once in the evening, and asks his sister Nina to take it in the morning. Lisa gets 15 right and Nina only gets 8 right, so he concludes that evening is a better time to study. Is this conclusion accurate?
1 point
1
Question 9
9.
Jamie wants to know: Do middle schoolers work harder solo or in pairs? She creates a challenging puzzle with ten steps. Choose which experimental set-up will answer the question best.
1 point
1
Question 10
10.
Kaleb is making chocolate chip cookies, and decides to use the scientific method to answer, "How does the amount of sugar effect the chewiness of cookies?" He makes one batch with 1/2 cup of white sugar, one batch with 1 cup of white sugar and another batch with 1 1/2 cups of brown sugar. What mistake did he make?
2 points
2
Question 11
11.
Sonja bakes cupcakes. She finds that they always gets a little bit burnt on the bottom and asks for your help to figure out why. Write a hypothesis to guide her next experiment. My hypothesis is that if....