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Variables
Variables 2
Experimental Design
Experimental Design 2
Other
100
A scientist plants two rows of corn for experimentation. She puts fertilizer on row 1 but does not put fertilizer on row 2. Both rows receive the same amount of water and light intensity. She checks the growth of the corn over the course of 5 months. What is a constant in this experiment? a. Amount of water b. Corn with fertilizer c. Corn without fertilizer d. Plant height
What is Corn without fertilizer
100
Students watched a cartoon either alone or with others and then rated how funny they found the cartoon to be. Independent Variable: Dependent Variable:
What is I.V. - with or without friends D.V. - how funny
100
What is a hypothesis?
What is an educated guess
100
Experimental Design: A scientist wants to test the effects of a chemical on how many apples grow in an orchard. She sprays the orchard with the chemical. A second orchard does not get sprayed with the chemical. In the fall, the number of apples harvested from each orchard is counted. Results: The orchard sprayed with the chemical yields (grows) 60 apples per tree. The orchard without the chemical yields 40 apples per tree. Which of the following is the independent (manipulated) variable in the experiment? a. The chemical b. The number of apples c. The orchard with chemicals d. The orchard without chemicals
What is the chemical
100

What is quantitative data?

Data with numbers

200
The measurable factor in an experiment is known as the ____. a. Control b. Independent variable c. Constant d. Dependent variable
What is the Dependent variable
200
A comprehension test was given to students after they had studied textbook material either in silence or with the television turned on. Independent Variable: Dependent Variable:
What is I.V. - TV on or off D.V. - score on test
200
How do you write a hypothsis?
What is "If the...then the..."
200
Experimental Design: A scientist wants to test the effects of a chemical on how many apples grow in an orchard. She sprays the orchard with the chemical. A second orchard does not get sprayed with the chemical. In the fall, the number of apples harvested from each forest is counted. Results: The orchard sprayed with the chemical yields (grows) 60 apples per tree. The orchard without the chemical yields 40 apples per tree. Based on the results, the scientist would _____. a. report her data b. test the chemical on other plants c. determine that the chemical increases apple yield d. determine that the results were invalid
What is C. determine that the chemical increases apple yield
200

What type of data is qualitative data?

Descriptive Data with Words

300

A student wants to conduct an experiment to find out how pulse rates change as the length of time spent exercising increases. The independent variable will be _____. a.Breathing rate b.Pulse rate c.Time spent exercising d.The kind of exercise

What is the time spent exercising

300
If the sugar amount increases then the candy bar will taste sweeter. Independent variable: Dependent variable:
What is I.V. - Amount of sugar D. V. - Sweetness
300
Write a hypothesis for the following: Manipulated variable: the age of the soda drink Responding variable: the number of gas bubbles If ________________________________________________________________________, then _____________________________________________________________________.
What is If the soda is old the the soda will have few bubbles
300

Experimental Design: A scientist wants to test the effects of a chemical on how many apples grow in an orchard. She sprays the orchard with the chemical. A second orchard does not get sprayed with the chemical. In the fall, the number of apples harvested from each forest is counted. Results: The orchard sprayed with the chemical yields 60 apples per tree. The orchard without the chemicals yields 40 apples per tree. In order for the apple tree experiment to be scientifically valid, both orchards must _____. a.receive the same amount of sunlight b.receive the same amount of water c.have the same species of apple tree d.all of these

What is D) all of the above

300

Which is the measured variable?

The dependent variable

400
A student hypothesized that the amount of sunlight a sunflower plant receives determines the number of sunflower seeds the plant produces. In her experiment, the number of seeds produced is the _____. a. Dependent variable b. Independent variable c. Controlled variable d. Manipulated variable
What is the dependent variable
400
List three variables that would affect the attendance at a football game. a. b. c.
What is Some examples: weather, game, team, age of football players, time in season
400
Write a hypothesis for the following: Manipulated variable: the amount of time paying attention in science class Responding variable: the grade on the science test If ________________________________________________________________________, then _____________________________________________________________________.
What is If you pay attention in science class then you will get a good grade on the science test
400
What is another word of manipulated variable?
What is Independent variable
400

What is the control group?

The group that does not receive the independent variable

500
In an experiment, the independent variable is _____. a. The result of the experiment b. The variable that stays the same c. Changed to test the hypothesis d. Time
What is changed to test the hypothesis
500
List three variables that would affect the number of apples that an apple tree produces. a. b.
What is Possible answers: Age of tree, type of tree, weather, type of soil, if the tree has been fertilized
500

What is the purpose of a hypothesis

To provide a statement to test a hypothesis

500
What is another word of dependent variable?
What is responding variable
500

What is an experiment?

A test of an hypothesis