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Experiments
Independent Variables
Dependent Variables
Controls
Misc.
250
The one and only variable that is purposely changed in an experiment.
What is Independent Variable
250
Jackson designed an experiment to test which brand of paper towel absorbs the most water.
What is Brand of paper towel
250
Harry performed an investigation to find out how temperature affects crystal growth.
What is Crystal Growth
250
Chris performed designed an experiment to find out if fig trees preferred sunlight or shaded areas to grow.
Same type of trees, Same soil, Same amount of water
250

organelle where energy is made in the cell

mitochondria

300
The variable that is observed or measured in an experiment.
What is Dependent Variable
300
Jamie performed an investigation to find out if hot, cold, or room temperature water is better for growing tomato plants.
What is Temperature of Water
300
Donna performed an investigation to find out if a heavier or lighter ball would roll down a ramp faster.
What is Speed of Ball
300
Greg performed an investigation to find out which color of bird feeders humming birds prefer.
Same locations of bird feeders, Same food in bird feeders, Same type of bird feeders
300

organelle that controls what goes in and out of the cell

cell membrane

300
Testable answer to a question...
What is Hypothesis?
300
Harry performed an investigation to find out how temperature affects crystal growth.
What is Different Temperatures
300
Jenny designed an experiment to find out which color absorbed the most heat.
What is Amount of Heat Absorbed
300
Trevor performed an investigation to find out if soaking bean seeds would make the seeds sprout more quickly.
Same type of seeds, Same amount of water, Same temperature of water
300

products of photosynthesis

glucose and oxigen

400

variables that must remain the same in all samples in an experiment

constants or controlled variables

400
Wilber performed an investigation to find out if bigger or smaller parachutes created more drag.
What is Size of Parachutes
400
Peter wondered if cooler temperatures would impact how quickly Venus Flytraps closed.
What is Speed of Venus Flytraps Closing
400
Ramie performed an investigation to find out how pitch varied when he tapped bottles filled with different amounts of water.
Same size and shape of bottles, Same object used to tap bottles, Same force to tap bottles
400

reactants of cellular respiration

CO2, ATP, H2O

500

2 ways to make an experiment more valid

1. increase the number of samples

2. repeat the experiment

500
Peter wondered how the period of a pendulum was dependent upon string length.
What is Different String Lengths
500
Levi designed an experiment to test if yawning is contagious.
What is Amount of Yawns
500
Trevor designed an experiment to find out which model bridge design can hold the most weight
Same materials to make model bridges, Same size of model bridges, same weight increments
500

Reactants of Photosynthesis

H2O, CO2 (solar energy)