CP Chemistry
Alchemy Unit 1 Practice Test 2015 – EASY VERSION
Multiple Choice (1 point each )
Identify the choice that best completes the statement or answers the question.
1.Which precaution should you take when you see this symbol?
A. / do not look directly at the experimentB. / wear goggles if you are doing the experiment
C. / wear goggles if you are performing or observing the experiment
D. / watch the teacher carefully and follow what he or she does
2.Matter includes all of the following except
A. / air. / C. / smoke.B. / light. / D. / water vapor.
3.A measure of the quantity of matter is
A. / density. / C. / volume.B. / weight. / D. / mass.
4.To calculate the density of an object,
A. / multiply its mass and its volume. / C. / divide its volume by its mass.B. / divide its mass by its volume. / D. / divide its mass by its area.
5.An object has a mass of 26.94 grams and a volume of 2.568 cubic centimeters. What material is it likely to be made of?
Substance / iron / gold / silver / copperDensity (g/cm3) / 7.874 / 19.32 / 10.49 / 8.92
A. / Iron / C. / Silver
B. / Gold / D. / Copper
6.What is the correct reading for the volume of water in the graduated cylinder below?
A. / 16 mL / C. / 18 mLB. / 17 mL / D. / 19 mL
7.Which of the following is not an appropriate lab safety rule?
A. / Wear safety goggles for all lab work. / C. / Report any laboratory accident, no matter how small to you teacher immediately.B. / Check chemical labels twice to make sure you have the correct substance. / D. / Pour leftover chemicals down the drain before washing the glassware.
8.Which piece of lab equipment would you use to measure the volume of a liquid most accurately?
A. / test tube / C. / graduated cylinderB. / beaker / D. / watch glass
9.Which is not part of the definition of matter?
A. / It can be seen. / C. / It has volumeB. / It has mass. / D. / It takes up space.
10.The density of gold is 19.3 g/cm3 and lead is 11.4 g/cm3. What is true about the density of a lead block that is coated with gold?
A. / Its density is 19.3 g/cm3. / C. / Its density is 11.4 g/cm3.B. / Its density is between 11.4 g/cm3 and 19.3 g/cm3. / D. / There is not enough information to determine the density of the block.
11.Which can be classified as matter?
A. / helium / C. / an ideaB. / sound / D. / anger
Short Answer
1.Draw particle diagrams to show two ways that a substance can be more dense than the sketch on the left. (2points)
2.
The diagrams show 15 mL of water in one graduated cylinder and a rock sample in another. How can you use one or both graduated cylinders to determine the volume of the rock sample? (2points)
3.What is the name of the piece of lab equipment shown here? (2points)
4.An archeology student found a copper-colored coin at a dig. She determined that the mass of the coin is 4.33 g and its volume is 0.48 cm3. Is the coin copper? Explain your thinking. (3 points)
Name of metal / Density (g/cm3)Aluminum / 2.7
Zinc / 7.1
Copper / 9.0
Silver / 10.5
Lead / 11.4
Gold / 19.3
Problem
Each Problem is worth 3 points,
1 point for using the correct equation,
1 point for correct calculation and
1 point for using correct units in the final answer.
1.The density of aluminum is 2.70 g/cm3. The volume of a solid piece of aluminum is 1.50 cm3. Calculate its mass.
.
2.The mass of a 5.00 cm3 sample of gold is 96.5 g. Calculate its density.
.
3.Use the following graph to answer the questions.
As the volume of substance increases, the mass of the substance INCREASES or DECREASES (CIRCLE ONE).
What is the volume of a sample if its mass is 4 grams? _____ mL
What characteristic of a substance is being displayed by the graph?
______
Essay
This question is worth 4 points. There are at least 4 possible answers,
identify at least 2.
no extra credit for additional answers
1.The figure shows a student mixing two chemicals. Is she following safe laboratory practices? Support your answer with details.
CP Chemistry Unit 1 Practice Test 2014
Answer Section
MULTIPLE CHOICE
1.ANS:CPTS:1DIF:Bloom's Level 2NAT:A.1 | A.2
STA:5.1.12 C1 | 5.1.12 A2
2.ANS:BPTS:1DIF:IIOBJ:1.2.4
3.ANS:DPTS:1DIF:IOBJ:1.2.1
STA:5.3.C.1 | 5.6.A.6
4.ANS:BPTS:1DIF:IOBJ:1.2.4
STA:5.3.C.1
5.ANS:CPTS:1DIF:Bloom's Level 3NAT:UCP.2 | B.2 | E.2
STA:5.1.12 B1 | 5.1.12 B2
6.ANS:APTS:1
7.ANS:DPTS:1
8.ANS:CPTS:1
9.ANS:APTS:1
10.ANS:BPTS:1
11.ANS:APTS:1
SHORT ANSWER
1.ANS:
Students must show a more tightly packed box...
PTS:1
2.ANS:
Students will descrinbe water displacement...
PTS:1
3.ANS:
Bunsen Burner
PTS:1
4.ANS:
Student must calculate density 4.33 divided by 0.48 cm3 = 9.02 g/cm3----- 2 points
matching this to chart to determine that it is probably copper ---- 1 point...
PTS:1
PROBLEM
1.ANS:
m = DV = 2.70 g/cm3 ¥ 1.50 cm3 = 4.05 g
PTS:1DIF:IIOBJ:1.2.4STA:5.3.C.1
2.ANS:
D = m/V = 96.5 g/5.00 cm3 = 19.3 g/cm3
PTS:1DIF:IIOBJ:1.2.4STA:5.3.C.1
3.ANS:
As the volume INCREASES, the mass of the substance INCREASES.
(The line has a positive slope); slope is equal to change in rise (the y-variable or VERTICAL)) divided by change in run (the x-variable or HORIZONTAL).
The volume of a sample that has a mass of 4 grams = 12 mL.
The graph is displaying the characteristic called DENSITY.
PTS:1
ESSAY
1.ANS:
No, the student is not following appropriate laboratory safe practices. Violations include:
a. Pouring water into acid instead of acid into water
b. Long hair not tied back
c. No protective clothing (apron, gloves)
d. Goggles are not being worn
PTS:1DIF:Bloom's Level 6NAT:UCP.2 | A.1 | A.2
STA:5.1.12 C1 | 5.1.12 A2