Variables
Constants and Controls
Observation, Inference, or Hypothesis?
Measurements
Water
100
This variable is the one that the experimenter changes.
What is the independent variable?
100
This is used in an experiment as the "normal" group to compare with the experimental group.
What is the control group?
100
This dog is black.
What is an observation?
100
Its the name of this tool for measuring the volume of liquids.
What is a graduated cylinder?
100
Water is this kind of solvent.
What is universal solvent?
200
This changes as a result of the independent variable.
What is the dependent variable?
200
This is something in an experiment that the experimenter keeps the same.
What is a constant?
200
If the temperature gets below 45 degrees Fahrenheit, then plants will grow more slowly.
What is a hypothesis?
200
This is the unit of measurement we use to describe mass.
What are grams?
200
Water is this kind of molecule.
What is a polar molecule?
300
This variable goes on the x-axis of a graph.
What is the independent variable.
300
John decided to test to see how the amount of light in hours affects plant growth in centimeters. He used the same type of plant for each test and the same soil composition in each plant's pot. These were the constants in this experiment.
What are the type of plant and soil composition?
300
This dog is hungry. 
What is an inference?
300
There are this many centimeters in 2 meters.
What is 200?
300
Water is composed of these elements.
What are hydrogen and oxygen?
400
John decided he wanted to see if using more than the recommended amount of fertilizer would affect how many tomatoes his tomato plant produced. In this experiment, it would be the independent variable.
What is: the amount of fertilizer used?
400
Mary wants to see how temperature affects mold growth on bread. She puts one loaf of bread under a heat lamp, and one loaf of bread in the freezer. She should have made to include this group in her experiment.
What is a control group?
400
This animal ate plants.
What is an inference?
400
This is the amount of liquid in the pictured graduated cylinder. (Don't forget your unit!)
What is 43 mL?
400
We used this scale, which measures from 1 to 14, to measure the concentration of hydrogen ions in a solution.
What is the pH scale?
500
A farmer decided to see if he could make his chickens lay more eggs by changing their diet. He fed one group of chickens the usual feed, and in the other groups he gave them increasing amounts vitamin rich enhanced feed. He also fed one group feed with increased insect protein. This is the dependent variable in the experiment.
What is the number of eggs laid?
500
Without maintaining these, an experiment will likely have inconsistent results and not yield reliable data.
What are constants?
500
This is the term for an educated guess about the outcome of an experiment.
What is a hypothesis?
500
We placed a bushel of apples on a scale and now we need to record its mass. This is the mass depicted here. (Don't forgot your units!)
What is 640 g?
500
Water is an important part the maintenance of a balanced internal condition, a process called this.
What is homeostasis?