Notes SPI 0807.12.4 Mass and Weight Science Learning Intention: Distinguish between mass and weight using appropriate measuring instruments and units. Purpose: to understand how mass and weight are different from each other. Success Criteria I will show that I understand this topic by earning a 90 or higher on the quiz. I Can Statement By the end of this unit I will be able to say... ...I can compare and contrast mass and weight.

Mass Notes Key Questions What is it? How is it measured? SPI 0807.12.4 Mass and Weight Notes Science Mass Key Questions What is it? How is it measured? How can I tell the difference between mass and weight? Mass: What is it? Mass is the amount of matter in an object. In other words it is how much "stuff" is in an object. Everything that is made of matter has mass. Anything that is solid, liquid, gas, or plasma has mass.

Mass: How is it measured? We measure mass with a triple-beam balance or an electric balance (there are various kinds) We are measuring the amount of matter in the object This measurement does not change from planet to planet Unit of measure for mass: Grams Examples: milligrams (mg), grams (g), kilograms (kg) Triple-Beam Balance

Mass: How Can I Tell the Difference Between Mass & Weight? SPI 0807.12.4 Mass and Weight Notes Science Mass: How Can I Tell the Difference Between Mass & Weight? Mass does not change from planet to planet (weight does) Example: -A full/unopened can of coke on Earth has a mass of 390g. -same unopened can on Mars would have the same mass (390g) Earth Mars 390g 390g

Weight Notes Key Questions What is it? How is it measured? SPI 0807.12.4 Mass and Weight Notes Science Weight Key Questions What is it? How is it measured? How can I tell the difference between mass and weight? Weight: What is it? Weight is the measure of gravity’s pull on an object. Weight = mass of the object times the acceleration of gravity F.Y.I.-formula for weight is W = M x G Everything made of matter can be affected by gravity. (This includes all solids, liquids, gases, & plasma).

Weight: How is it measured? Measure weight by using a scale (there are various kinds) We are actually measuring the force of gravity's pull This measurement changes from planet to planet Unit of measure for weight: Newtons (not pounds!)

Weight: How to Tell the Difference Between Mass & Weight Weight changes from planet to planet, but mass does not Example: A full/unopened can of coke on Earth weighs 3.61 Newtons. The same unopened can on Mars would weigh 1.20 Newtons Why? Mar has less gravity than Earth. So there is less force pulling on the can on Mars than there is on Earth. Earth Mars Earth Mars 3.61 N 1.20 N

Mass vs Weight Song-Video SPI 0807.12.4 Mass and Weight Notes Science Mass vs Weight Song-Video Task: Write down three things mentioned in the video Link (3 min 12 sec): "The Mass vs Weight Song" by Mr. Edmonds Mr. Edmonds: Science Teacher

SPI 0807.12.4 Mass and Weight Science Questions

Science Questions Mass does not change from planet to planet. SPI 0807.12.4 Mass and Weight Mass does not change from planet to planet. Science Questions (Mass is measured in milligrams, grams, kilograms, etc.)

Science Questions Measure weight with a scale. Mass and Weight SPI 0807.12.4 Mass and Weight Science Questions Unit of measure for weight is Newtons. Objects with more mass weigh more than objects with less mass.

Science Questions Earth has more mass (is more massive) than Mars. SPI 0807.12.4 Mass and Weight Science Questions Therefore Earth has more gravity than Mars. Connection: more mass = more gravity, less mass = less gravity More mass = More gravity Less mass = Less gravity

Science Questions Mass does not change from planet to planet. SPI 0807.12.4 Mass and Weight Questions So the answer cannot be section 4 about mass. Science Weight does change from planet to planet. Each planet has a different amount of gravity. Therefore, objects have different weights from planet to planet. Sect 2: Weight Sect 4: Mass