Let’s Review the Basics
Let’s Review the Basics
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What is Mass?
What is Mass?
Mass is the measure of how much matter (little pieces) is in an object.
Mass is the measure of how much matter (little pieces) is in an object.
How We Measure It
How We Measure It
Measured by scales, balances, and sensor pads
Measured by scales, balances, and sensor pads
Units are grams (g), kilograms (kg), pounds (lbs)
Units are grams (g), kilograms (kg), pounds (lbs)
What is Volume?
What is Volume?
Volume is the amount of space an object takes up.
Volume is the amount of space an object takes up.
How We Measure It
How We Measure It
Measured by graduated cylinders, burettes, rulers, and table/ teaspoons (tsp and tbsp)
Measured by graduated cylinders, burettes, rulers, and table/ teaspoons (tsp and tbsp)
Units are milliliters (mL), cubic centimeters (cm3 or cc), and fluid ounces (fl.oz)
Units are milliliters (mL), cubic centimeters (cm3 or cc), and fluid ounces (fl.oz)
Let's use what we know about mass for this next topic
Let's use what we know about mass for this next topic
Law of Conservation of Mass
Law of Conservation of Mass
"mass is neither created nor destroyed in chemical reactions"
"mass is neither created nor destroyed in chemical reactions"
That means...No matter how you arrange the parts of a substance, the amount of mass stays the same because it is still the same matter!
That means...No matter how you arrange the parts of a substance, the amount of mass stays the same because it is still the same matter!
Look at these Lego builds, they are all made of 18 legos.
Look at these Lego builds, they are all made of 18 legos.
They are arranged differently & have different shapes.
They are arranged differently & have different shapes.
They are made of the same legos, so they have the same mass!
They are made of the same legos, so they have the same mass!
The combined mass of the materials of this monster foam reaction have the same mass as the foam!
The combined mass of the materials of this monster foam reaction have the same mass as the foam!
Examples In Nature
Examples In Nature
Lava
Lava
Lava creates rocks by cooling.
Lava creates rocks by cooling.
The lava goes from a liquid to a solid but it has the same mass in both forms!
The lava goes from a liquid to a solid but it has the same mass in both forms!
Sedimentary Rock
Sedimentary Rock
Sedimentary rocks are created from sand, formed by compacting the sand particles together.
Sedimentary rocks are created from sand, formed by compacting the sand particles together.
The sand goes from individual grains to this larger sedimentary rock-but it has the same mass as all those smaller pieces of sand added together.
Each stripe in the rock is a layer of sand.
The sand goes from individual grains to this larger sedimentary rock-but it has the same mass as all those smaller pieces of sand added together.
Each stripe in the rock is a layer of sand.
Metamorphic Rock
Metamorphic Rock
Metamorphic rocks are made by compacting together smaller rocks under heat and pressure.
Metamorphic rocks are made by compacting together smaller rocks under heat and pressure.
The mass of the new metamorphic rock is the same as all the rocks that were fused together added up.
The mass of the new metamorphic rock is the same as all the rocks that were fused together added up.
Shelf Ice
Shelf Ice
Most winters the edges of Lake Michigan near us freeze over and develop shelf ice.
Most winters the edges of Lake Michigan near us freeze over and develop shelf ice.
The water transforms from liquid to solid ice, but the mass of that ice is the same as if you were to melt and take the mass of that water.
The water transforms from liquid to solid ice, but the mass of that ice is the same as if you were to melt and take the mass of that water.
Food Chain
Food Chain
Mass moves from organism to organism up food chains
Mass moves from organism to organism up food chains
The material may change from plant to part of animal to waste or gasses, but the amount original mass from the plant consumed can be traced the entire way.
The material may change from plant to part of animal to waste or gasses, but the amount original mass from the plant consumed can be traced the entire way.
Challenge: Wildfires
Challenge: Wildfires
A tree has a large mass, for example let’s say 1,000 pounds. This tree catches on fire, and burns to the ground!
A tree has a large mass, for example let’s say 1,000 pounds. This tree catches on fire, and burns to the ground!
1000 Pound Tree
100 Pounds of Ash
The ash from the entirely burnt tree has a mass of only 100 pounds, BUT remember mass can’t be destroyed!
The ash from the entirely burnt tree has a mass of only 100 pounds, BUT remember mass can’t be destroyed!
The other 900 pounds were released as carbon dioxide in the air and water vapor.
The other 900 pounds were released as carbon dioxide in the air and water vapor.
900 Pounds of Smoke (CO2 and Steam)
Review
Review
100 Pounds of Ash
100 Pounds of Ash
900 Pounds of Smoke (Steam and Carbon Dioxide)
900 Pounds of Smoke (Steam and Carbon Dioxide)
1000 Pound Tree
1000 Pound Tree
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