viernes, 8 de marzo de 2013
MATTER
Matter is anything that has mass and takes up space. Matter makes up the materials around you. Not everything ismatter for example light and sound.
MASS
Describes the amount of matter in an object. Objects that are the same size can be made up of differents amount of matter.
WEIGHT
Is a measure of gravitational force on an object. Gravitational force keeps objects on Earth from floating into space.
How are mass and weight measured?
The balance compares and object´s mass to known standards of mass called countermasses. The spring measures the force between the mass and the pan and Earth. The standard scientific unit for weight, however is the newton (N).
VOLUME
Is the amount of space thant an object takes up. Object with similar volumes do not always have the same mass.
HOW CAN VOLUME BE DETERMINED?
There are different ways to find the volume of an object. You can take a few measurements and calculate the volume using the formula. or liquids, you can use a graduated cylinder and with irregular object you use the formula.
USING THE FORMULA
to find the volume we use the following formula:
volume= (lenght)(weight)(height)
v=lwh
USING WATER DISPLACEMENT
In the labs, breaker or graduated cylinder to measure the volume of the liquids.The volume of liquids is often expressed in liters or mililiters. Two objects cannot occupy the same space at the same time.
DENSITY
Is a measure of the amount of mass in a given volume. Objects containing the same amount of mass can take up different amounts of space.
FORMULA OF DENSITY
To find the density we use the following formuyla:
d= m/v
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