Writing a Hypothesis
Define hypothesis.
An educated guess to answer a focus question.
Define independent variable.
The variable that the scientist changes.
What two words should a hypothesis statement include?
If and then
Why is it called a controlled experiment?
The scientist only changes one factor.
Choose the best hypothesis statement:
A. If salt levels in soil increase, then plant growth will decrease.
B. If plant growth increases, then the salt levels in soil will decrease.
A. If salt levels in soil increase, then plant growth will decrease.
What are the two kinds of data called? And what do they mean?
Qualitative data- Observations
Quantitative data- Measurements, numbers
Write a hypothesis statement for the following: Exposure to UV light may cause cancer.
If exposure to UV light increases, then the risk of cancer will increase.
I scientist sets up an experiment to see which plant fertilizer makes plants grow the tallest. What is the dependent variable in the experiment?
The height of the plant.
Write a hypothesis statement for the following:
An increased number of cars may cause air pollution.
If there is an increased number of cars, there will be more air pollution.
I scientist sets up an experiment to see which plant fertilizer makes plants grow the tallest. What are two of the constants the scientist should have?
Amount of water, amount of sunlight, plant type