Tuesday, Oct. 15 th : “A” Day Wednesday, Oct. 16 th : “B” Day (early out) Agenda  Ch. 2 review questions?  Jeopardy Review  Homework: Vocab Puzzle/Concept Review Ch 2 test Next Time! Concept review packets will be due

Chapter 2 Review Problems on Chapter Review?

Ch 2 Short Answer Test Questions  The “Critical Thinking” questions in the Jeopardy review game are the short answer questions that you will see on the Chapter 2 test!

Matter & Energy Ch.#2

THE RULES: You will be in 5 teams The winning team will receive mole money that can be used for 1 point on a test. The host’s decisions are final

And now…here is the host of Jeopardy… Mrs. Elfline

Let’s Get Ready to play… Today’s Categories are:

Vocabulary

Sig Figs Sig Figs & Scientific Notation Scientific Notation

Critical Thinking Critical Thinking

Calculations!

Refrigerator Magnets

$100 $200 $300 $400 $500 Vocabulary $100 $200 $300 $400 $500 Sig Figs & Sci. Sig Figs & Sci. Notation $100 $200 $300 $400 $500 Critical Thinking $100 $200 $300 $400 $500 Calculations! $100 $200 $300 $400 $500 Refrigerator Magnets DD FJ

The energy of motion Answer…

Kinetic Energy 100

The kinetic energy of the particles in a sample of matter Answer…

Temperature 200

Any factor that could affect the results of an experiment Answer…

Variable 300

A statement or mathematical expression that describes a behavior of the natural world Answer…

Law 400

A chemical process that absorbs energy A chemical process that absorbs energy Answer…

Endothermic Process 500

Answer… What is the measurement rounded to 2 significant figures? rounded to 2 significant figures?

Answer… How many sig figs are in mm?

2 200

What is written in scientific notation? Answer…

8.40 x

(6.02 x 10 7 ) (9.1 x 10 5 ) Remember sig figs! Answer…

5.5 x

How many significant figures does have? Answer…

3 500

Explain why is an ice cube melting a physical change. Answer…

The water molecules are still water molecules, they haven’t chemically changed. The water has just changed states from a solid (ice) to a liquid (water). 100

Explain the difference between an endothermic process and an exothermic process. Answer…

In an endothermic process, energy is absorbed. In an exothermic process, energy is given off or released. 200

Explain why pictures of atoms and molecules are models. Answer…

Because atoms and molecules are way too small to see, scientists must use models to study their structure and behavior. 300

Why should a scientist record all observations, even those that appear insignificant or don’t agree with the hypothesis? Answer…

ALL scientific observations provide information, even if the information does not agree with the hypothesis. Many scientific discoveries have been made because experiments did not turn out as expected. 400

The mass of a 3.45g piece of aluminum was measured several times. The measured masses were 2.67g, 2.59g, and 2.64g. Use these results to explain the difference between accuracy and precision. Answer…

The measured masses were NOT close to the actual mass of the aluminum, 3.45g, so the measurements were NOT accurate. The measured masses WERE closely grouped together, so they WERE precise. 500

Convert 323 K to ˚C Answer…

50˚C 100

Convert 20˚C to K Answer…

293 K 200

An object has a mass of 57.6 g. Find the object’s density if the volume of the object is cm 3. Remember sig figs and units! Answer…

1.43 g/cm g/cm 3 300

The temperature of a piece of copper with a mass of 95.4 g increases from K to K when the metal absorbs 849 J of energy as heat. What is the specific heat of the copper? Remember sig figs and units! Answer…

.385 J/gK.385 J/gK 400

How much energy is needed to raise the temperature of a 75 g sample of aluminum from 22.4 K to 94.6 K if the specific heat of aluminum, c p, is J/gK. Remember sig figs and units! Answer…

4,900 J 4,900 J 500

Answer…

Charlie Brown 100

Answer…

Dorothy (from the Wizard of Oz) 200

Answer…

Michael Jackson 300

Answer…

William Shakespeare 400

Answer…

Flavor Flav 500

Daily Double How much do you want to wager? Daily Double Daily Double

FINAL JEOPARDY

CATEGORY: Calculations and Sig Figs How much do you want to wager? Proceed…

The dimensions of a rectangle are 1.27 cm, 1.3 cm, and 2.5 cm. What is the volume? Remember sig figs and units! Proceed…

4.1 cm 3 Proceed…

Thanks for PLAYING!

Credits Created by: Chad Kafka, Business Teacher Huntley High School Jeopardy sound effects used solely for the purpose of fun, entertainment, and education and NOT for profit.