Measuring Matter
Weight
1. Is a measure of force of gravity on you. 2. Weight is a way to measure matter. The force of gravity on the moon is much weaker than on earth, so you would weigh 1/6 of what your weight is on earth.
Common units of volume include:
1. Liter (L) 2. Milliliter (mL) 3. Cubic centimeters (cm3) Cubic centimeter is equal to the milliliter (1cm3= 1mL) Equating Units of Volume 1L= 1,000 mL 1mL= 0.001L 1mL= 1cm3
International System of Units (SI)
1. Scientists use this system to measure properties of matter. The SI unit of mass is the kilogram (kg). The gram (g) a smaller unit. Equating Units of Mass 1 kg=1,000 g 1 g=0.001 kg
Volume
1. The amount of space that matter occupies. 2. Solids, liquids, and gases all have volume.
Is density use to identify a substance?
Density is a physical property of a substance. So, density is used to identify an unknown substance.
Density
1. Density relates the mass and volume of an object or materials. 2. Density is the measurement of how much mass is contained in a given volume. 3. Density is an important part of matter for to calculate the density of a sample, divide its mass by its volume.
Mass
1. The mass of an object is the measurement of the amount of matter in the object. 2. Mass is another way to measure matter. On the moon, the amount of matter in your body does not change. The mass of the moon is much less than the mass of earth, so the moon exerts much less gravitational force on you. Unlike weight, mass does not change with location, even when the force of gravity on an object changes. Scientists prefer to describe matter by its mass and not its weight, because unlike weight, mass does not change with location, even when the force of gravity (weigh an on object changes) the mass of an object is a physical property.
How are weight and mass different?
1. Weight is the measure of the force of gravity on an object, where as mass is the measure of matter in an object. 2. Mass does not change with location, while wight does
What is the formula for density?
Density= Mass/ Volume
Do two objects need to have the same volume if they have the same mass?
Different materials may have the same mass but may have a different volume. For example, a pound of feathers and a pound of sand.
What is the unit density of a liquid?
For liquids, density is often given in grams per milliliter (g/mL).
What are the units used to measure mass?
Kilogram (kg) and gram (g) are the units scientists use to measure mass.
How do you find if something is less dense of more dense than than water?
The density of water is 1g/cm3. Anything that floats on water has a density lower than water. Anything that sinks in water has a greater density than water.
What is the Unit of density of a solid?
The unit of density of a solid is always a unit of mass such as grams, divided by a unit of volume, such as cubic centimeters (g/cm3).
How is the volume of a regular object found?
The volume of rectangular objects can be found by multiplying the measurement of length, width, and height.
How is the volume of a solid expressed?
The volume of solid objects are usually expressed in cubic centimeters (cm3).
How do you find the volume of an irregular shape?
To find the volume of an irregular shape such as a piece of fruit or a rock, you must submerge the object in water in a granulated cylinder. The water level will rise by an amount that is equal to the volume of the object in mL. To find the displacement of the object, you first put water in a beaker and record the level. Submerge the object in the water. the water will rise and record the new water level. Subtract the original level of water to the new level. The difference is the volume of the irregular shape. This is called the displacement method.
What is the formula of the volume of a regular object?
Volume= length (l)~width (w)~height (h) Volume= l~w~h
How do you write the unit of the volume of a solid?
When calculating the volume, not only do you multiply the numbers, you must make sure that you write the units as cubed that is for example cm3 or in3 or ft3.
