Variables
Scientific Questions and hypotheses
Test Groups
Observations and inferences
Tools
100
The variable that the scientist has control over is called the...
Independent Variable
100
A good scientific question never starts with what word?
WHY
100
The group the the scientist changes is called the..
Experimental group
100
Observation or Inference? The duck is yellow
Observation
100
The tool used to measure the length of an object.
ruler
200
The variable that you observe or measure during an experiment.
Dependent Variable
200
An educated or logical guess/prediction is called a...
Hypothesis
200
The group that the scientist uses to compare their results is called....
The control group.
200
What is an observation?
An observation is information collected with the senses.
200
What is the tool best used to measure the mass of an object?
Scale
300
A supermarket manager wanted to know if bleach or Lysol would kill more bacteria on her cart handles so she tested them both. What is the dependent variable?
The amount of bacteria on cart handles
300
Write a Hypothesis for this scientific question: Do runners/sprinters who take steroids (an illegal drug that helps build muscle) run faster than those that do not?
Runners who take steroids will be able to run faster because the steroids make them stronger.
300
I wanted to see if watering a plant with Mountain Dew would make it grow taller. I watered on plant with Mountain Dew and another plant with water. Which is my control group?
The plant watered with water.
300
Observation or Inference??“It feels slippery”
Observation
300
When you take the mass of an object on a scale, what units do you use?
Grams
400
A supermarket manager wanted to know if bleach or Lysol would kill more bacteria on her cart handles so she tested them both. What is the independent variable?
Type of cleaning solution
400
Write a good scientific question for this scenario: Microsoft is a computer software company that has many scientists as employees. 25 of the scientists go to sleep 4 hours a night. 75 of the scientists get about 8 hours of sleep per night. The company is beginning to see that the scientists who sleep more are able to complete more work per month than those who sleep less.
Does the amount of sleep a scientist gets affect the amount of work they are able to complete?
400
A supermarket manager wanted to know if bleach or Lysol would kill more bacteria on her cart handles so she tested them both. What is the best control group? A. Cart cleaned with lysol B. Cart cleaned with bleach C. Cart cleaned with neither D. Cart Cleaned with both
C. A Cart cleaned with neither.
400
Observation or inference “It smells like a swimming pool"
Inference
400
The tool best used to measure the volume of a liquid.
Graduated Cylinder
500
What is the dependent variable in this scenario? Microsoft is a computer software company that has many scientists as employees. 25 of the scientists go to sleep 4 hours a night. 75 of the scientists get about 8 hours of sleep per night. The company is beginning to see that the scientists who sleep more are able to complete more work per month than those who sleep less.
The amount of work the scientist complete.
500
I grew two apple trees over the summer. One tree received fertilizer and the other one did not. The tree that was fertilized, grew more apples. What scientific question was i trying to answer with this experiment?
Does fertilizer affect the amount of apples that grow on an apple tree grows?
500
You want to test the effect that Coca-Cola has on the growth of a gummy bear. Describe your experimental and control group.
Experimental Group- gummy bear in coca-Cola Control Group- Gummy bear in empty cup
500
Observation or Inference??“It looks foggy so it’s going to snow.”
Inference
500
What piece of laboratory equipment is most appropriate to use if you wanted to mix a solution.
Erlenmeyer Flask
M
e
n
u