Graphing
Which variable goes on the x-axis of your graph?
A student wants to test how different amounts of sunlight affect plant growth. What is the independent variable?
The amount of sunlight the plants receive
Qualitative or Quantitative? : The foam rose by 20ml.
Quantitative
Be the first group to stand up and shout "Hooray!"!
Hooray! :)
A marine biologist is studying a species of sea turtle for the effect of different types of food on their weight in pounds. What should be the label and units on the y-axis?
Weight of turtle (lbs)
A scientist tests if music affects how fast hamsters run on a wheel. What should the scientist measure as the dependent variable?
Speed of hamsters
What goes in the "if" part of a hypothesis?
The IV
Students test if the type of liquid (water, soda, juice) affects how fast seeds germinate. What should they keep constant?
Amount of liquid given, location of seeds, sunlight on seeds, etc
A car company tracked their car sales in millions for 5 years. If they were to make a graph of this data, what would be a good title for the graph?
Number of car sales vs years
Students test if the type of liquid (water, soda, juice) affects how fast seeds germinate. What is the IV?
The type of liquid
A group of students added fertilizer to a plant to see if it helped the plant grow taller. They had a second plant that they did not add any fertilizer to. Both plants got the same amount of water. What does the water represent in the setup of the experiment?
Constant
What goes in the "then" part of a hypothesis?
The DV
An experiment occurs where some students eat breakfast and others don't before taking a test. Their test scores are calculated as a percentage and then compared. What information should go on the y-axis of a graph?
Test scores (%)
A teacher sets up two fish tanks: one with fertilizer added and one without. Give a possible hypothesis for this experiment.
If _________, then __________. (answers vary)
A group of students is observing pillbugs in a choice chamber. As the experiment progresses they count 10 pillbugs on the side of the chamber with the disco light in it and 5 on the side of the chamber with no disco light. What represents the control group in this experiment?
A group of students observes a plant placed in normal sunlight and another plant placed under green light. The plant under green light performed less photosynthesis. What does the plant placed under green light represent in this experiment?
Experimental group
Draw a bar graph for the following data:
Student 1 earned $50 selling cookies
Student 2 earned $35 selling cookies
Student 3 earned $40 selling cookies.
Be sure to label the x and y axis and make a title.
Your teacher will hold up a correct example!
A Maine South Cross Country member is testing out a new pair of shoes to see if it lowers her race time at the next meet. What is the DV?
A pharamicist set up a study to determine whether Vitamin C could reduce cold symptoms. 10 volunteers were split into two equal groups. For two weeks, members of Group 1 took 1 tablet of the Vitamin C. Group 2 took a placebo (a sugar pill that does not contain the supplement). At the end of the two-week period, the pharmacist exposed the volunteers to germy preschoolers. The volunteers in both Group 1 and Group 2 continued to take their daily pills. All the volunteers developed symptoms of a cold, and there was no significant difference in the length of time the cold symptoms lasted. Make a claim about the Vitamin C.
The Vitamin C was ineffective in reducing cold symptoms.
Researchers are observing the effect of adding growth hormones to oak trees. What is one example of QUALITATIVE data and one example of QUANTITATIVE data they could collect?
Answers may vary!
Qualitative = descriptive
Quantitative = numerical