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Last Night's Homework
The controlled experiment
Making a graph
Make this Experiment more reliable
Topic 8 Vocab
100
the frogs would produce less carbon dioxide
What would the scientists assume would happen at low temperatures in question 24?
100
the variable that is manipulated by the experimenter
What is the independent variable?
100
marking the sides of the axis with marks and numbers that increase by a fixed value (the same amount; by 5's or 10's for example)
What is making an appropriate scale?
100
changing only one thing.
What is testing a single variable?
100
support for the idea that something is true
What is evidence?
200
the enzyme would work best at pH 7 and pH 8
What are the pH values at which the enzymes works the best?
200
the variable that responds to changes in the independent variable.
What is the dependent variable?
200
putting points on the grid and connecting the points with lines.
What is plotting the graph? or What is plotting the line graph?
200
Instead of doing the experiment on one test subject
What is "have large sample size?" or What is "increase the number of test subjects?"
200
influenced by an assumption that may or may not be correct
What is biased?
300
pH
What is the independent variable in this experiment for question 26?
300
factors that must be kept the same between the control and experimental group in an experiment
What are constants?
300
the variable that has its scale on the y-axis
What is the dependent variable?
300
The missing part of this experiment:A student tests the effects of a cough drop on reducing coughs. He gives a group of ten people the cough drop and takes data on the number of coughs.
What is a control group?
300
attempts to explain what has been observed in a way that can be tested.
What is a hypothesis?
400
the group in an experiment that receives the independent variable
What is the experimental group?
400
the variable that has its scale on the x-axis
What is the independent variable?
400
The mistake in this experiment: a student wants to test soil moisture effect on seed germination. He places one group of plants in the sun with no water and he places another group in the shade with water. He grows the plants for 20 days and records his results.
What is testing two variables? or What is putting plants in different amounts of sunlight?
400
when the possible variables have been carefully considered and regulated so the results are due only to the independent variable you are testing.
What is a controlled experiment?
500
If we increase the temperature, then the metabolism of the frogs will increase.
What is the hypothesis for the experiment in question 23?
500
the group in an experiment that does not receive the independent variable and is used as a basis for comparison.
What is the control group?
500
Making a statement about the changes in one variable and the corresponding changes in the other variable.
What is stating the relationship between the variables? or What is stating the trend in the graph?
500
The pill that patients are given when they do not receive an experimental medicine.
What is the placebo?
500
a way of explaining or demonstrating what might be happening and to predict what will occur in new situations.
What is a model?