Nine Weeks Exam Review

The Following Topics will be on your nine weeks exam. It will be to your advantage to

write down what you are shown on this PowerPoint.

Topic 1: Scientific MethodYou will need to be able to list the 6

steps in the Scientific Method. They are:1. Identify the problem

2. Collect Information and do research

3. Form a hypothesis

4. Test the hypothesis (Perform the experiment)

5. Analyze your data

6. Form a conclusion

Topic 1: Scientific Method

You will need to be able to identify the hypothesis, independent and dependent variables and read a chart or graph based on the data given in a scenario.

Definitions of importance:

Hypothesis: a testable statement

Independent variable: the variable that is changed by the experimenter in the experiment.

Dependent variable: the variable that changes as a result of a change in the independent variable (this is generally what you are measuring)

Topic 1: Scientific Method

Example Scenario:

The lunchroom cooks at ABC Middle School wanted to know which type of pizza students would be most likely to eat. To complete this experiment, the lunchroom ladies surveyed the 250 students by placing 4 choices of pizza out and allowing the students to select one slice from the pizza of their choice. The manager then compiled the results from the test. The four pizza selections available were: cheese, 3-meat (hamburger, bacon and pepperoni), veggie delight and supreme. The results of the test are shown in the graph.

Identify the hypothesis, independent variable and dependent variable.

Then look at the graph and draw a conclusion about what type of pizza the lunchroom should serve.

Topic 1: Scientific Method

Cheese20%

3-Meat48%

Veggie Delight12%

Supreme20%

Pizza Preferences

Topic 1: Scientific Method

Hypothesis: Which type of pizza do students want most?

Independent Variable: Types of Pizza

Dependent Variable: The number of students who chose that type of pizza

Questions from graph: 1. Which two types did students choose equally?

Supreme and Cheese

2. Which type of pizza did most students select? 3-Meat

Draw a conclusion: Which type of pizza should the lunchroom serve based on the likes of their students?

They should serve 3-meat if they are serving based on the greatest number of students wanting the pizza, but could also serve cheese and veggie in smaller quantities.

Topic 2: Units of Measure

You should be able to name the base SI Unit used to measure each of the following:

Mass – grams

Length – meters

Temperature – kelvin

Amount of a substance – mol

Molar Mass – g/mol

Topic 2: Units of Measure

Know the value of kilo, hecto, deka, deci, centi and milli

Be able to convert between two units

Moving to the left you divide and moving to the right you multiply.

Topic 3:Accuracy and Precision

Know the definition of AccuracyKnow the definition of Precision

Topic 4: Atomic Structure

Know the charge of a neutron.

Know the charge of a proton.

Know the charge of an electron.

Know the charge of the nucleus and why it has this charge.

Be able to draw an atom and place its particles in the correct location

Topic 4: Atomic Structure

Be able to define: Isotope

Atomic Mass

Mass Number

Atomic Number

Be able to look at the periodic table and fill out information about an element such as: Element Name

Atomic Number

Symbol

Atomic Mass

Topic 5: Molar Mass

You need to be able to work molar mass problems.

Be able to:Find the molar mass of a compound

Convert from grams to mols

Convert from mols to grams

Topic 6: Electron Configuration

You will have to be able to do the following concerning electron configuration:(I will select one element for you to do for each category.)

Write a full electron configuration (Elements 13-20)

Write a noble gas configuration (Elements 11-56)

Draw an orbital notation configuration (Elements 1-36)

You will also need to know the period trends for atomic radii, ionization energy and electronegativity as well as the definitions covered in section 5.3.

Layout of the TestThere will be matching and a few multiple choice, but most questions will be short answer and problems. If you can answer all the questions

and topics covered on this PowerPoint you will do just fine!

Bring the notes you took today with you tomorrow! It will be advantageous to you!