The fruit flies
Lower the temperature in the tank by 1 degree Celsius each day and see how it affects the number of times a fish's gills flap each minute
Make a hypothesis about the relationship between water temperature and the number of times a fish's gills flap each minute
At the same time each day, count the number of times a fish's gills flap each minute
Take readings of the water temperature in the aquarium in the morning, in the afternoon, and in the evening
If a seedling is watered, it will always grow toward the light.
If a seedling is exposed to a light source, the seedling will bend toward the light.
If the tip of a seedling is removed, the seedling will die, even if exposed to light.
If light does not reach the tip of a seedling, the seedling will not bend toward the light.
The high temperature for each day in May
The names of chemicals found in one brand of diet soda
The win-loss record of a tennis team since 1990
The average growth in height of all sophomores over a year
The insect has three legs on each side.
The insect has a pattern on its back.
The insect's pattern shows that it is poisonous.
The insect is tan, brown, black, and white.
A logical interpretation of data.
The same as an observation.
A statement involving numbers
A way to avoid bias
All the variables must be kept the same.
Everything can be studied by setting up a controlled experiment.
Controlled experiments can not be performed on living organisms.
Only one variable is tested at a time.
The germination of plants from 150 seeds at 15 degrees Celsius and 150 seeds at 22 degrees Celsius
The germination of plants from 300 seeds, all at slightly different temperatures
The germination of plants from 100 seeds at 15 degrees Celsius, 100 seeds at 22 degrees Celsius, and 100 seeds at 29 degrees Celsius
The germination of plants from 150 seeds in light at 15 degrees Celsius and 150 seeds in dark at 15 degrees Celsius
If chlorine and monochloramine are added to drinking water, they will be more effective than chlorine alone against C.parvum
If chlorine dioxide is added to drinking waer, it will be more effective than either chlorine or monochloramine against C.parvum.
If C.parvum becomes resistant to chlorine dioxide over time, it will not become resistant to chlorine or monochloramine.
If C.parvum is resistant to chlorine and monochloramine, it will become resistant to chlorine dioxide over time.
To investigate and explain the natural world
To explain events in the natural world
To establish a collection of unchanging truths
To make useful predictions
Stop studying dinosaurs and study only living animals
Work to raise live dinosaurs to study
Continue to learn as much as they can about dinosaur extinction
Accept the current theory as the best theory
A set of facts
A way of knowing
A collection of beliefs
A list of rules
Testing a hypothesis
A mass of information
A control group
A single variabls