Variable Review
Concepts:
· A pendulum is a mass, suspended on a pivot point, free to swing.
· A variable is anything that you can change in an experiment that might affect the outcome.
· In a controlled experiment all variables are controlled except one, allowing the experimenter to observe the effect of that one variable on the outcome.
· The length of a pendulum determines the number of swings in a unit of time.
· Capacity is the maximum volume of fluid a container can hold.
· The larger the capacity of a boat, the greater the number of passengers it can hold.
· A system is a set of related objects that can be studied in isolation.
· A system is a set of related objects that is working together.
· Conducting multiple experimental trials adds validity to results.
· Graphs can be used to demonstrate the relationship between an experimental variable and the results.
Vocabulary Words
Controlled experiment
Cycle
Pendulum
Standard
Two-coordinate graph
Variable
Capacity
System
Independent variable
Dependent variable
I need to find out…
· relationship between the number of pennies needed to sink a boat and the capacity of the boat.
· in a flipper system – what effect the angle of launch has on how far a person can flip an aluminum ball.
· parts of a pendulum system.
I need to be able to
· make a graph using independent variables and dependent variables.
· name the parts of a catapult system.
· explain the relationship between the length of the strings and the number of swings a pendulum makes in 10 seconds.
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