1. What Is Matter?

2. Matter Everything is made of MATTER! Everything is made of MATTER! Matter is anything that has mass and takes up space (volume). Matter is anything that has mass and takes up space (volume). Volume is the amount of space an object takes up, or occupies. Volume is the amount of space an object takes up, or occupies.

3. Measuring the volume of liquids Liquids have volume. We measure that volume with a graduated cylinder. Liquids have volume. We measure that volume with a graduated cylinder. Notice the meniscus in the graduated cylinder. Notice the meniscus in the graduated cylinder. Always measure at the bottom of the meniscus! Always measure at the bottom of the meniscus! A liquid in any container has a meniscus. A liquid in any container has a meniscus. Liters (L) and mL (milliliters) are most often used to express the volume of liquids. Liters (L) and mL (milliliters) are most often used to express the volume of liquids.

4. Solid Volume The volume in a solid is always expressed in cubic units. The volume in a solid is always expressed in cubic units. Cubic means having “three dimensions.” Cubic means having “three dimensions.” Cubic meters(m 3 ) or cubic centimeters(cm 3 ) are most often used to express the volume of a solid. Cubic meters(m 3 ) or cubic centimeters(cm 3 ) are most often used to express the volume of a solid. The 3 in m 3 signifies that three quantities were used to get the final result. (That is a derived quantity!) The 3 in m 3 signifies that three quantities were used to get the final result. (That is a derived quantity!) If each side in the cube below is 2m, what is the volume of the cube? If each side in the cube below is 2m, what is the volume of the cube? __________ __________

5. The Volume of Solids, Liquids, and Gases 1 mL = 1 cm 3 REMEMBER THAT! 1 mL = 1 cm 3 REMEMBER THAT! That is why you can compare the volume in liquids to solids. That is why you can compare the volume in liquids to solids. How do you measure the volume of a gas? How do you measure the volume of a gas? You can’t see, so how do you measure it? You can’t see, so how do you measure it? ex: balloon _________________________

6. Matter and Mass What is mass? What is mass? Mass is the amount of matter that something is made of. Mass is the amount of matter that something is made of. Even atoms have mass! Even atoms have mass! Looking at the picture… Looking at the picture… The mass stays constant in certain forms of matter such as…__________________. The mass stays constant in certain forms of matter such as…__________________. The mass changes in certain forms of matter such as…_________________. The mass changes in certain forms of matter such as…_________________.

7. What is the difference between mass and weight? This is an important concept to understand! This is an important concept to understand! Let’s start by understanding gravity. Let’s start by understanding gravity. Gravity is the force of attraction between objects that is due to their masses. Gravity is the force of attraction between objects that is due to their masses. All matter experiences gravity! All matter experiences gravity! The amount of attraction between two objects depends on their weight. The amount of attraction between two objects depends on their weight. There is attraction between all objects with mass, but since they are so small in reference to the earth, the attraction between them is also small. There is attraction between all objects with mass, but since they are so small in reference to the earth, the attraction between them is also small.

8. So, what about weight? Weight is the measure of the gravitational force exerted on an object! Weight is the measure of the gravitational force exerted on an object! Look at Spot and the rock…which one is attracted to the earth more through gravitational force? ________________ Look at Spot and the rock…which one is attracted to the earth more through gravitational force? ________________ Which one weighs more? ___________ Which one weighs more? ___________ So, this means the greater the gravitational force, the greater the weight. So, this means the greater the gravitational force, the greater the weight. Which weighs Which weighs more? ------->

9. Measuring Weight and Mass The SI unit for mass is kilogram (kg). The SI unit for mass is kilogram (kg). Sometimes we will use milligrams or grams. (mg or g) Sometimes we will use milligrams or grams. (mg or g) The SI unit for weight (or gravitational force) is NEWTONS. The SI unit for weight (or gravitational force) is NEWTONS. A Newton is approximately equal to the weight of a 100 gram mass on earth. A Newton is approximately equal to the weight of a 100 gram mass on earth.

10. The major differences between MASS MASS A measure of the amount of matter in object. A measure of the amount of matter in object. Always constant, no matter the location. Always constant, no matter the location. Measured with a balance. Measured with a balance. Expressed in kilograms, grams, and milligrams. Expressed in kilograms, grams, and milligrams. WEIGHT WEIGHT A measure of the gravitational force on an object. A measure of the gravitational force on an object. Varies depending on where the object is in relation to the earth. Example: ____________ Varies depending on where the object is in relation to the earth. Example: ____________ Measured with a spring scale. Measured with a spring scale. Expressed in Newtons. Expressed in Newtons.

11. Mass is a measure of Inertia What in the world is inertia? What in the world is inertia? Ever try to move a car? Yeah, it is difficult! Ever try to move a car? Yeah, it is difficult! That is because of inertia! That is because of inertia! Inertia is the tendency of all object to resist a change in motion. Inertia is the tendency of all object to resist a change in motion. This will cause objects that are still to remain still, and allow objects that are moving to continue moving. This will cause objects that are still to remain still, and allow objects that are moving to continue moving. Mass is a measure of inertia because the greater the mass of an object…the more difficult it is to move. Mass is a measure of inertia because the greater the mass of an object…the more difficult it is to move.