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The quantity of Matter And The space it occupies

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Presentation on theme: "The quantity of Matter And The space it occupies"— Presentation transcript:

1 The quantity of Matter And The space it occupies
Mass and Volume The quantity of Matter And The space it occupies

2 Mass All Matter Has mass and takes up space.
Mass represents the amount of matter. How much stuff is there? Mass is measured with a balance. A balance compares a piece of matter with a known amount. If they balance then they have the same mass. Just like balancing on a see-saw with your friend

3 Units of mass Mass is measured in grams The abbreviation is g.
This is what we will be using in science class. There are other units. The most common are Kilograms (Kg). We use these to measure our body mass bowling balls and airplanes and other big stuff. Milligrams (mg). We use this to measure medicine, pin, stamp, a feather and other small stuff.

4 Volume All Matter Has mass and takes up space.
Volume is the amount of space that matter occupies. Volume of a regular solid (one that has straight edges) can be measured with a ruler. The formula is length x width x height L x W x H The unit for a solid volume is cm3

5 Volume of a liquid or granular solid
To find the volume of a liquid you use a graduated cylinder. The rules for reading a graduated cylinder are: Place it on a flat surface Read it at eye level Read the bottom of the meniscus The units for vol of a liquid are millilitres (mL)for small amounts like toothpaste or juice box. For large amounts we use Litres (L). Eg. Milk, gasoline, hot water tank

6 Finding the volume of irregular solids
Displacement method Place water in a graduated cylinder (enough to cover the solid). Measure the initial volume (Vi) of water (40 mL) Place the object in the graduated cylinder and watch the water rise. Measure the new Final volume (Vf) . (43mL) Subtract the initial volume from the final volume Vf – Vi = Volume of object (this is what we call a formula) (43mL – 40mL = 3 mL) this is an example of how you use a formula.

7 Finding the volume of a large irregular solid
Overflow method Fill overflow beaker with water to the top. Let the water drip out until it stops. (Don’t make a mess) Place an empty graduated cylinder under the spout. Gently place the object into the overflow can. Catch all the water that spills out. (right to the last drop) Measure the volume of water in the graduated cylinder. This represents the volume of the object. (no math.... Woopie!!)


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