Variable that is delibrately changed in an experiment
What is independent variable
100
A company makes vitamins and wants to know if they have bad side effects. They choose 2000 people and gave them a vitamin a day for one yer. Then they surveyed them to see if they had any effects. What is the greatest problem with this experiment?
What is no control group
100
In an experiment to determine whether popping of popcorn is affected by the temperature at which it is stored, counting the popped kernels is an example of a(n)
What is observaton
200
Process of gathering information using your senses
What is observation
200
The prefix that means 0.001
What is milli-
200
Variable that remains the same for both groups
What is constant variable
200
Experiment wanted to test effect of caffeine on heartbeat. They gave one group of people caffiene and one group no caffeine and monitored their heartrates. What are some variables that need to remain constant between groups?
What is age, health/exercise, temperature
200
That sounded like the dog is mean.
What is an inference
300
A WELL tested explanation that explains a wide range of observations and makes predicitons
What is theory
300
The metric system is based on this number
What is 10
300
The group that is used for comparison purposes
What is control group
300
A student wants to see if chewing peppermint gum would help him do better on tests. What would be the independent and dependent variables in his experiment?
What is independent- gum; dependent- score on test
300
Why is it important for an experiment to have a control group?
What is for comparison to draw a conclusion
400
A logical interpretation of your observations
What is inference
400
3000 mL = ______ L
What is 3 L
400
The variable that is measured or observed
What is dependent
400
A company wants to test the effects of a new cancer drug. Group A received the new drug, Group B received a harmless solution. Which group is the experimental group?
What is Group A
400
Why is a false hypothesis still valuable in science?
What is still gives scientist information
500
A predicted explanation that is tested during an experiment
What is hypothesis
500
2.5 kg = _____________g
What is 2,500
500
Why is it important to have a controlled experiment with just one variable changed
What is then you can determine what caused the result (draw a conclusion)
500
A person wanted to see if Miracle Grow makes a plant grow faster. He took two identical plants. He added miracle grow to one of them and put it near the window. He did not put miracle grow in the other and placed it near the door. What is one error in his experiment?
What is changed more than one variable
500
List the 7 steps of the scientific method?
What is ask question, gather info, form hypothesis, test, analyze results, draw conclusion, report results