INTRODUCTION OF MATTER 7TH SCIENCE

What do you think? A large iceberg floats in water, but an anchor sinks. What is different about these two objects that causes them to behave differently in water?

What is Matter? Definition: discussion Classroom Inventory All matter is not visible. discussion Not everything is matter: discussion

What is Matter? Matter: is anything that has mass and takes up space. Examples of matter: water, trees, air, clouds and people. All matter is not visible: Most gases, such as those that make up air, are invisible. Not everything is matter: Light or sound- does not take up space or have mass.

What is mass?

Mass The amount of matter in an object. Measured using a balance Triple Beam or Double Pan Units: grams (g) Objects that are the same size can be made up of different amounts of matter, therefore have different masses.

Match everyday items associated with mass: milligram gram kilogram

Weight vs. Mass discussion Mass vs. Weight Weight vs. Mass discussion

Mass vs. Weight Weight: measure of the gravitational force of an object. Gravitational force keeps objects on Earth from floating in space. The greater that the mass of an object is, the greater the gravitational force on the object will be and the greater the object’s weight will be. An object’s weight can change with location. The weight on the moon is 1/6 of its weight on Earth.

How are mass and weight measured? TRIPLE BEAM/DOUBLE PAN BALANCE SPRING SCALE Unit: gram (g) Unit: Newton (N) Does not change - constant Changes with location A 100 – g mass weighs approximately 1 N on Earth. 1 Newton (N) is approximately one-fourth of a pound.

AMOUNT OF SPACE THAT AN OBJECT TAKES UP OR OCCUPIES VOLUME AMOUNT OF SPACE THAT AN OBJECT TAKES UP OR OCCUPIES

Same Volume: Different Mass

Calculating Volume: Regular Shaped Object Irregular Shaped Object Device: metric ruler Device: Graduated Cylinder Formula: length x width x height Formula: final volume – initial volume Units: centimeters cubed Units: mL

Density

Density Formula