Noah wants to know if he can shoot a basketball with his left hand as well as he can shoot with his right hand. Which of these represent variables in this experiment?
A. height of goal
B. size of ball
C. both of these
D. neither of these
What is C. Both of these (height & size)
100
After flipping a coin 10 times, you've gotten 8 heads and 2 tails. You're worried your results are inconsistent with what "should" happen. What could you do to address this concern?
What is Increase the sample size.
100
Joe is thinking about using salt water to water his plants so he places 10 plants near the window. Each day, he gives 5 plants 10 mL of sea water and 5 plants 10 mL of fresh water. He measures them each day for 20 days.
By measuring the heights of the plants, Joe was collecting what type of data?
What is quantitative data.
100
Your doctor asks your parents if you can participate in a clinical trial of a new asthma medicine. If everyone agrees, you could receive....?
What is either the medicine or the placebo
200
A scientist is interested in comparing the amount of sugar in Coke vs. Pepsi. What might he do first?
What is develop a procedure.
200
To determine who is faster, Luke and Levi will race from the basketball goal to the jungle gym on the playground. Which variable are you controlling in this experiment?
What is the distance they are running.
200
Joe is thinking about using salt water to water his plants so he places 10 plants near the window. Each day, he gives 5 plants 10 mL of sea water and 5 plants 10 mL of fresh water. He measures them each day for 20 days.
Which variable did Joe keep constant?
What is the amount of water.
200
Plants Average Initial Average Final
receiving: Height (cm) Height (cm)
Seawater 12.1 12.9
Freshwater 12.4 14.7
Based on this data, what can you conclude about Joe's experiment?
What is the plants grow better with fresh water.
200
Today, a clinical trial of a new medicine would most likely include:
A. informed consent
B. use of a placebo
C. large sample size
D. all of the above
What is D. All of the above (informed consent, use of a placebo, and a large sample size)
300
If you're trying to find the average length of a group of snails, how many snails would you like to be in you sample size?
What is the more the better (at least 20).
300
Table 1: Jump shot distance
Trial Distance in feet
1 16 In Table 1, what was the range
2 9 of the distance of jump shots?
3 11
4 24
What is 9 to 24 or 15 feet
300
Joe is thinking about using salt water to water his plants so he places 10 plants near the window. Each day, he gives 5 plants 10 mL of sea water and 5 plants 10 mL of fresh water. He measures them each day for 20 days.
How could Joe increase his sample size?
What is by increasing the number of plants.
300
When a baby is taken to the doctor, they record data such as height and weight. These measurements are compared averages for healthy babies. Current data for the growth ranges for healthy babies were most likely collected from how many babies?
What is more than 100
... 1,000's
... 10,000's
... 100,000's
300
Explain why scientists use a placebo when testing medicines on humans.
What is as a control. Placebos are used to make comparisons to tell if the real medicine is working.
400
You're trying to convince your parents to stop buying you red polo shirts for school. What is a qualitative piece of data you could use to support your opinion?
What is red is ugly.
...It doesn't go with khakis
...I look bad in red
(any descriptive answer that DOES NOT have numbers)
400
You are not sure how much sugar to add to the Kool-aid mix. You want to test how much sugar will make your Kool-aid too sweet. What could be a possible hypothesis for this problem?
What is (possible answer) Adding more than 2 cups of sugar will make the Kool-aid too sweet.
400
Joe is thinking about using salt water to water his plants so he places 10 plants near the window. Each day, he gives 5 plants 10 mL of sea water and 5 plants 10 mL of fresh water. He measures them each day for 20 days.
What is a possible hypothesis for this experiment?
What is Salt water affects the growth of plants.
400
Testing medicines on people involves both benefits and risks. A risk that you accept in order to gain a benefit is known
as a....
What is trade-off
400
A school is about to buy laptop computers. Which of the following information about the laptops is qualitative?
A. weight
B. color
C. amount of money
D. screen size
What is B. color
500
Name 4 factors that are part of a well-designed experiment.
What is purpose, hypothesis, procedures, previous research, variables, data, sample size, control group, repeated trial, informed consent
500
Table 1: Jump shot distance
Trial Distance in feet
1 16 What is the mean (average)
2 9 distance of jump shots?
3 11
4 24
What is 60/4 = 15 ft.
500
Joe is thinking about using salt water to water his plants so he places 10 plants near the window. Each day, he gives 5 plants 10 mL of sea water and 5 plants 10 mL of fresh water. He measures them each day for 20 days.
Did Joe use a control group, if so, what was it?
What is Yes, the fresh water acted as a control.
500
If scientists should know one thing going into a scientific investigation involving people it is....
What is all people are different, but generalizations can be made.
500
How are medicines tested during a clinical trial?
What is 2 groups are used. A treatment group that receives the actual medicine and a control group that receives a placebo so comparisons can be made.