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Observations

Using the senses to gather data from the environment

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Tools

May extend the senses

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Qualitative Observation

Properties of an item that are not easily measured

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Qualitative and Quantitative

Two types of observations

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Quantitative

Type of observation where a property can be measured using a tool that extends the senses

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Length

Distance between two points

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Width

Distance between two points

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Height

Distance between two points

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volume

how much space an object takes up

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Regular Solids

Cubes, Rectangular Prisms, Cylinders, Spheres are examples of what kind of geometric shapes

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Formula

The Volume of a Regular Solid can be calculated using a

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Rectangular Solids

The Formula V = L x W x H gives the Volume of

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cylinders

The Formula V = (Pi) x R2 x H gives the Volume of

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water displacement

the volume of an irregular solid is determined using

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Mass

How much matter an object contains

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Mass is Determined Using

A Balance

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Measured using a Stopwatch

Time

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temperature

measured with a thermometer

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Celsius scale

for most measurements, temperatures are measured on the

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Fahrenheit scale

for weather variables, temperatures are recorded on the

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density

describes how much mass is found in an amount of space

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density

constant for substances at given temperatures

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T/F: Density can never change

FALSE

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heated

in general, density decreases as a substance is

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cooled

in general, density increases as a substance is

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T/F: Density is effected by pressure

TRUE

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increases

if the same amount of mass is compressed (squished) into a smaller space, the density

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decrease

if the pressure of an object, like a gas, decreases, its volume will expand while its mass stays the same, causing the density to

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cooled

***EXCEPTION*** = water- density decreases as it is

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D = M/V is the formula for

density

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D = M/V this formula represents

Density = Mass ÷ Volume

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you can use the density equation to determine two other things

Mass or Volume

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T/F: If you are looking for either mass or volume, put density over 1 and cross multiply and divide

TRUE

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