Experimental Vocab
Independent or Dependent?
Strong Hypothesis
Yeast lab
Bonus!
100
This is your educated prediction of your scientific question.
Hypothesis
100
In OUR yeast lab, this was the independent variable
The type of sugar
100
A strong hypothesis is in ____ format.
"If... then... because..."
100
What kind of organism is yeast?
A microscopic fungus!
100
In an experiment, _____ are things that must be kept the same between all experimental groups in order for the test to be fair.
constants
200
In an experiment, this is what you change or alter between each experimental group.
Independent Variable
200
In our yeast lab, this was the dependent variable.
The size of the balloon / The amount of CO2 produced.
200
A STRONG hypothesis must ____ the specific question being asked.
answer
200
What does yeast produce as a waste product?
Carbon dioxide / CO2!
200
Name two constants in our yeast experiment.
The temperature of the water, the amount of water, the type of yeast, the amount of yeast, the amount of time the yeast had to grow, the amount of sugar added, the size and type of bottle, and the size of balloon.
300
In an experiment, this is what you measure or look for at the end of your trial.
Dependent Variable
300
A group of students wants to measure which type of food crickets will prefer. They place three different kinds of food in the crickets' habitat and observe how many crickets go to and eat each type over one hour. What is the independent variable in this experiment?
The type of food, because it is changed or altered between groups of crickets.
300
Is this a STRONG hypothesis for our yeast experiment? Explain.
"I think the yeast will prefer white sugar."
No! It is not in "If... then... because..." format
300
According to our class data, what kind of sugar did the yeast prefer? Explain.
The yeast preferred the white sugar, because it caused the yeast to produce the most CO2.
300
Why are the procedures for the yeast experiment below NOT as strong as they could be?
"Take some yeast. Put it in a bottle. Add some sugar. Shake it up."
They are not specific or detailed. It doesn't tell you how much, what kind, or for how long.
400
This is data that you collect through measurements and numbers, like centimeters, degrees, etc.
QUANTitative data
400
A group of students wants to measure which type of food crickets will prefer. They place three different kinds of food in the crickets' habitat and observe how many crickets go to and eat each type over one hour. What is the dependent variable in this experiment?
The number of crickets eating each food, because this is what we are looking for/measuring.
400
Is this a STRONG hypothesis for our yeast experiment? Explain.
"If our water is warmer, then the yeast will be more active because they prefer warm temperatures."
No! It does not answer the question being asked!
400
What types of food does yeast help to produce?
Bread, beer, wine, vinegar, and others.
400
In the graph below, what type of bread causes the most mold growth over time?
Overall, Rye bread
500
This is data collected through your senses that describes what you see, hear, smell, or feel about your experiment.
QUALitative data
500
"Does sugar content affect the melting time of ice cream?" What would be the IV and DV in an experiment designed to test this question?
IV: the amount of sugar in each ice cream
DV: the melting time of the ice cream
500
A group of students want to find out how the acidity of water might affect the growth of a plant. Is the following a strong hypothesis for this question? Explain.
"If we increase the acidity of the water given to our plants, then I think the plants will grow less because I have researched that acidity can be damaging to some plants."
Yes! It is in the correct format, and it answers the question being asked.
500
TRUE or FALSE: Yeast is a living thing.
True!
500
What kind of preservative works best to prevent a banana from turning black?
"Control", which has no preservatives