Variables
The variable that is measured/observed in an experiment.
What is DEPENDENT VARIABLE?
Four things that all line graphs have.
What is a title, y-axis, x-axis, and key?
Scientists perform an experiment to test the effects of sunlight on the growth of kudzu. What is the independent variable in this experiment?
What is sunlight intensity?
Which tool would you use to measure 0.5mL of hydrogen peroxide?
A. 200mL flask
B. 10mL test tube
C. 2mL pipette
D.50mL beaker
What is C. 2mL pipette
The variable that is tested/changed in an experiment.
What is a INDEPENDENT VARIABLE?
This graph is used to show data over time.
What is a line graph?
An educated guess or prediction for what might happen in an experiment.
What is a HYPOTHESIS?
The body responds to increased temperature by sweating, which helps to reduce body temp. This demonstrates which characteristic of life?
What is HOMEOSTASIS?
The variables that remain unchanged in an experiment.
What are CONTROL VARIABLES?
This graph is used to compare two or more similar items.
What is a bar graph
A biology class conducted an experiment using five plants. The first plant received only water. The remaining plants received different amounts of fertilizer added to their water. The class wanted to know which plant would show the greatest amount of growth. Identify the independent, dependent variables AND the control group.
IV: amounts of fertilizer
DV:growth of the plants
Control: giving one plant only water
What should you do about an unlabeled bottle at your lab station?
What is INFORM/NOTIFY THE TEACHER?
Which variable is located on the x-axis? y-axis?
y-axis: DEPENDENT
x-axis: INDEPENDENT
Scientists observed two groups of white mice and counted the number of offspring they produced. One group of white mice received large doses of vitamin A with its food and water. The other group got the same amount of food and water, but no vitamin A.
What question were the scientists trying to answer?
"What effect does vitamin A have on the production of white mice?"
"Does vitamin A affect the number of offspring produced?"
How do we find the volume of irregular shaped objects?
What is water displacement?
What are two ways that living things reproduce?
What is SEXUAL and ASEXUAL REPRODUCTION?
The number(s) of variables/factors that are changed in a controlled experiment.
What is one?
Scientists observed two groups of white mice and counted the number of offspring they produced. One group of white mice received large doses of vitamin A with its food and water. The other group got the same amount of food and water, but no vitamin A.
What is independent variable? dependent variable?
IV: vitamin A
DV: number of offspring produced
The formula to determine the density of an object
What is Density=Mass divided by volume
A drug company is testing ow well drug X prevents colds. During the cold season, one group receives a placebo while the other group receives drug X. A bar graph including both groups is drawn to show how many people in each group caught a cold.
What information should be included on the Y-axis of this graph?
What is THE NUMBER OF PEOPLE WHO CAUGHT A COLD?