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Validity of Experiments
Variables and Control
Experimental Design
Unity of Life
Potpouri
100
Alicia tested a new hair product on 5 people and decided to invest $1000 in the product. Her investment is not a good idea because of this.
What is small sample size.
100
The variable that is manipulated by the researcher.
What is the independent variable.
100
Julie wanted to test the effectiveness of a fertilizer on plant growth. She got 2 identical plants. She placed 2mg of fertilizer on one and 5mg of fertilizer on another. She measured the growth of the plants over a week. What is missing from her experimental setup?
What is a control group.
100
Some people do not consider viruses to be alive because they lack this characteristic of life.
What is cells.
100
"Each action has an equal but opposite reaction" is an example of a
What is scientific law.
200
An experiment is not considered valid if other researchers are unable to conduct the same experiment and
What is get the same results.
200
The variable that changes in response to changes made to the independent variable.
What is the dependent variable.
200
Dave wants to determine if diet and exercise will lower cholesterol in his patients. He places one group of 100 patients on a vegetarian diet and a running regimen. The other group receives their normal diet and no running regimen. Dave collects cholesterol levels after several months. The flaw in his experiment is
What is two independent variables.
200
In animals, life functions are performed by organs. In unicellular organisms, these same life functions are performed by
What is organelles.
200
When an organism reproduces asexually, its DNA is ___________ to the parent's DNA.
What is identical.
300
When conducting background research for an experiment, it is important to consult _______________ sources.
What is reliable.
300
"If I run daily, then I will build stamina," is an example of a
What is hypothesis.
300
A website you should never use for scientific research
What is wikipedia.
300
Organism, Organ system, organ, ___________, organelle. The missing word it
What is tissue.
300
Although sexual reproduction takes a longer time than asexual reproduction, the benefit is that there is an increase in
What is genetic diversity.
400
In order for an experiment to be valid, it must be _______ reviewed.
What is peer.
400
In an experiment, the setup that provides a basis of comparison is known as
What is a control.
400
Out of 500 people, 345 had above average heart rates is an example of this kind of data.
What is quantitative.
400
All organisms take in nutrition through the process of
What is ingestion
400
When creating or reading a graph associated with a scientific experiment, the x axis always represents the
What is independent variable.
500
This is a statement that has been supported by multiple hypotheses and experiments. However, it could be disproved at any time.
What is a theory.
500
A harmless pill given to a control group instead of a medication is known as
What is a placebo.
500
Jeff wanted to know if music could enhance students' performance in mathematics. He gave 100 students music to listen to during a math test. He found 100 other similar students and had them take the same test without music. After one trial, he decided that music did not help students in math. To increase the validity of his experiment, Jeff should
What is run the experiment multiple times.
500
When a person is tired, he or she will often crave sugary foods that give a burst of energy. This is an example of which characteristic of life?
What is homeostasis.
500
Cellular respiration takes place in the
What is mitochondria.