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# Science Review 1

### Review of science on investigations 1 and 2

Pendulum a mass hung from a fixed point that swings back and forth
Cycle any motion or activity that repeats itself
Variable anything in an experiment that might affect or change the outcome
Standard basic procedure used in a controlled experiment before you change any variables
Controlled-Experiment an experiment in which one variable is changed and compared to standard
Two-Coordinate Graph shows the outcome of a series of experiments when a variable is changed by steps
Galileo Italian scientist who used a pendulum to measure time
Capacity greatest amount in a fluid container
Density amount of matter that will fit in given space
Archimedes mathematician and scientist who used displaced water to tell about an object
Identify the variables that can affect or don't affect the number of swings in a pendulum can complete in a given time period affect: length of string do not affect: mass of bob, height of drop
Describe the relationship between the length of a pendulum and the number of cycles it makes the length of a pendulum will affect the number of cycles. longer=less
Identify variables that will affect the number of passengers lifeboats can hold the capacity, the water calmness, penny drop
Describe the relationship between the capacity of a boat and the number of passengers it can hold the more capacity the lifeboat has, the more passengers it can hold
Explain why a substance will float or sink if the substance has less density than the water (1) it will float, if it has more, it will sink
How dense is water 1.0 g
How dense is salt water 1.2 g
Created by: AZaborek58