Warm Up 8-17-15Direction: Copy the questions and provide answers 1. Why is the scientific method useful? 2. What is the difference between theory vs. law?3. What do you do if you accidentally break a

beaker during lab?

AgendaTurn in poster & syllabusLab: MassNotes Unit 1-1

HomeworkAug 20 – Lab safety quizAug 21 - Extra credit online due before 9PM

Warm Up 8-19-15Direction: Copy the questions and provide answers 1. What is the proper method when mixing acid

and water?2. Which of the 3 objects was the heaviest from the

mass lab?3. When do you use the eye wash station?

AgendaNotes Unit 1-1Finish Lab: Mass

Homework-Lab safety quizAug 21 - Extra credit online due before 9PM

Unit 1-1Properties and Changes of Matter

• A chemical is any substance that has a definite composition

-It is always made of the same stuff no matter where the chemicals come from-Some chemicals exist naturally, like carbon dioxide-Some chemicals are manufactured, like polyethylene (plastic)

Properties and Changes of Matter

• A chemical reaction is the process by which one or more substances change to produce one or more different substances.

- Chemical reactions take place all around you and inside you all the time: cooking food, digesting food, taking a photograph, striking a match, or driving a car.

States of Matter

• Matter is anything that has mass and volume

- All matter is made of particles- the type and arrangement of the particles determine its properties

States of Matter

• Solids have fixed volume and shape

• Particles in a solid are held tightly in a rigid structure and vibrate only slightly

States of Matter

• Liquids have fixed volume but not a fixed shape

• Particles in a liquid slip past each other, giving them the ability to flow and take the shape of their container

States of Matter

• Gases have neither fixed volume nor shape

• Gas particles move at a high speed and will fill any container they occupy

Changes of Matter

• Physical changes– Physical changes are those in which the identity of

the substance does not change– Changes in state of matter are also physical changes

-The process of dissolving sugar in ice tea is an example of a physical change-The arrangement, location, and speed of the particles might change

Changes of Matter

• Chemical changes– In a chemical change, the identities of the

substances change and new substances form

- Example: RespirationC6H12O6 + O2 H2O + CO2

Reactants Products

Changes of Matter

• Evidence of chemical change1. Evolution of a gas (bubbles)2. Formation of a precipitate (solids floating in a

liquid)3. Release or absorption of energy (it gets hot or

cold)4. Color change

Lab Mass• Find your lab group• Send 1 person up to get the scale & 1 for the

objects• Follow the procedure on your hand out and

record your data---------------------------------------------------------------Part 2 - Weight your vial first then add 10 grams of water into it. Then add 1 gram of oil in the water.

Scientific Method Review• SpongeBob notices that his pal Gary is suffering from

slimotosis, which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that drinking Dr. Kelp will be a better cure. SpongeBob decides to test this cure by rubbing Gary with seaweed for 1 week and having him drink Dr. Kelp. After a week of treatment, the slime is gone and Gary’s shell smells better.

1. Initial observation?2. Dependent and Independent variable?3. What should SpongeBob conclusion be?