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Homework

UPCOMING DATES:

Begin our unit on States of Matter Book K; Chapter 2

MAIN IDEAS OF SECTION #1: Three State of Matter

•The three most familiar states of matter are solid, liquid, and gas.

•All matter is made of tiny particles called atoms and molecules that attract each other and move constantly.

•A solid has a definite shape and volume.

•A liquid has a definite volume but not a definite shape.

•A gas does not have a definite shape or volume

The states of matter are the physical forms in which a substance can exist. For example, water commonly exists in three states of matter: solid (ice), liquid (water), and gas (steam).

A solid is the state of matter that has a definite shape and volume.

Liquid is the state of matter that has a definite volume but takes the shape of its container.

Viscosity is a liquid’s resistance to flow.

Gas is the state of matter that has no definite shape or volume.

MAIN IDEAS OF SECTION #2: Behavior of Gases

• Temperature measures how fast the particles in an object are moving.

•Gas pressure increases as the number of collisions of gas particles increases.

•Boyle’s law states that if the temperature doesn’t change, the volume of a gas increases as the pressure decreases.

•Charles’s law states that if the temperature doesn’t change, the volume of a gas increases.

Temperature is a measure of how fast the particles in an object are moving. The faster the particles are moving, the more energy they have.

Volume is the amount of space that an object takes up.

The amount of force exerted on a given area of surface is called pressure. Gas pressure increases as the number of collisions of gas particles increases.

Boyle’s law states that for a fixed amount of gas at a constant temperature, the volume of the gas is inversely related to the pressure. So, as the pressure of a gas increases, the volume decreases by the same amount.

Charles’s law states that for a fixed amount of gas at a constant pressure, the volume of the gas changes in the same way that the temperature of the gas changes. So, if the temperature increases, the volume of gas also increases by the same amount.

MAIN IDEAS OF SECTION #3: Changes in State

•A change of state is the conversion of a substance from one physical form to another.

•Energy is added during endothermic changes. Energy is removed during exothermic changes.

•The freezing point and the melting point of a substance are the same temperature.

•Both boiling and evaporation result in a liquid changing to a gas.

•Condensation is the change of a gas to a liquid. It is the reverse of evaporation.

•Sublimation changes a solid directly to a gas.

•The temperature of a substance does not change during a change of state.

Friday (6/12)

Wasn't that lab fun! Thanks to those of you who really cleaned up--the room looked great!

Monday (6/15) Happy BIRTHDAY to Mr. Bergang!

Wrap up and final thoughts..... and one last lab!

We had a great year, and I invite you to look over your first project and notice how much your writing has changed. You are all better at expressing your thoughts!

Tuesday (6/16)

Field day!

Please note our grading scale:

Report card grading is as follows:

                   A +    98-100
                   A        95 - 97
             A -      93 - 94

        B +     91 - 92
    B        87 - 90
      B -      85 - 86

                 C +     83 - 84
             C        80 - 82

C - 78 - 79

D + 76 - 77

D 72 - 75

D - 70 - 71

F Below 70

HAVE A GREAT WEEKEND!

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