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Science, Chemistry, Physics
8th -
11thgrade
Physical Science 2nd 9 Weeks PRACTICE TEST
30 questions
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- 1. Multiple Choice
Jadon plans on carrying out an experiment involving the burning of steel wool to illustrate the conservation of mass. Steel wool is made of iron. When it is burned it combine with oxygen to form iron (III) oxide. Which step in his experiment is the MOST important if he wants his experiment to correctly demonstrate the conservation of mass?
The steel wool should be burned inside of a sealed jar or other closed system.
The steel wool should be burned over a long period of time (at least two hours).
the steel wool should be burned in a room that is at room temperature (20 - 25 degrees Celsius).
The steel wool should be burned in its entirety so that no iron is left in its original state.
- 2. Multiple Choice
Look at the following equation. __Au2O3 --> __Au + __O2
In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?
2, 4, 3
1, 3, 1
2, 1, 3
1, 1, 3
- 3. Multiple Choice
Look at the following equation: 8Ag2S --> 10Ag + S8
What is true about this chemical equation?
It is balanced because the products contain the same number of sulfur (S) atoms as the reactants.
It is unbalanced because the products contain fewer silver (Ag) atoms than the reactants.
It is balanced because the mass of the reactants is equal to the mass of the products.
It is unbalanced because the number of reactants is less than the number of products.
- 4. Multiple Choice
Increasing the amount of solute in a solution also increases
the rate of solubility
the total amount of solution
the conductivity of the solution
the temperature of the solution
- 5. Multiple Choice
A student is trying to determine the phases of matter of two unknown substances. Which question can the student ask to determine which sample is in the the solid phase?
Which sample contains molecules that are sliding past one another?
Which sample contains molecules that have a high amount of energy?
Which sample contains molecules that are in an orderly arrangement?
Which sample contains molecules that are far apart and quickly moving?
- 6. Multiple Choice
What do gas solutes all have in common?
As you heat them up, they increase in solubility.
As you cool them off they decrease in solubility
As you heat them up, they decrease in solubility.
You cannot dissolve gases.
- 7. Multiple Choice
How many grams of NaCl will saturate a 200 g solution at 10 degrees Celsius?
38 grams
50 grams
84 grams
76 grams
- 8. Multiple Choice
You have 130 grams of NaNO3 at 70 degrees Celsius. What type of solution do you have?
saturated
unsaturated
supersaturated
dilute
- 9. Multiple Choice
Brett has an unknown substance that he wants to figure out the pH of. When he put the substance in tumeric water, it turns red, and when he puts a drop of it on to blue litmus paper, it remains blue. What type of solution did Brett most likely find?
acid
base
water
salt
- 10. Multiple Choice
Sequence the images above based on particle motion high to low.
4, 1, 2, 3
1, 4, 2, 3
3, 2, 1, 4
1, 2, 3, 4
- 11. Multiple Choice
Garrison wants to know why the shape of water changes when it goes through a state change. Which question could BEST help understand why the shape of water changes when it turns from a solid to a liquid?
Which model has the most water molecules?
Which model has the largest water molecules?
How can the color of the particles be described?
How can the arrangement of the particles be described?
- 12. Multiple Choice
A student views models of the particles in two phases of matter. Which question will help the student determine which model is a gas?
Do the particles vibrate in position?
Are the particles electrically charged?
Do the particles slide past each other?
Are the particles moving very quickly?
- 13. Multiple Choice
Which substance is the most acidic?
bleach with a pH equal to 13.0
sea water with a pH equal to 8.0
rain water with a pH equal to 5.5
lemon juice with a pH equal to 2.5
- 14. Multiple Choice
What determines if the solution is acidic?
A greater concentration of H+ ions than OH- ions.
A greater concentration of OH- ions than H+ ions.
Equal concentrations of OH- and H+ ions.
Higher concentrations of salt.
- 15. Multiple Choice
Steve wants to determine the identity of an unknown chemical. Steve observes that the unknown chemical does not react with most metals, it produces a salt, and it feels slippery. What is most likely the pH of the substance?
6.5
7
9.8
2.4
- 16. Multiple Choice
LiOH is added to water to form a solution. How does adding LiOH to the water affect its pH level?
LiOH releases oxygen ions in water, which decreases its pH level.
LiOH releases hydroxide ions in water, which increases its pH level.
LiOH releases hydrogen ions in water, which increases its pH level.
LiOH releases lithium ions in water, which decreases its pH level.
- 17. Multiple Choice
Which of the following would help to dissolve a solute?
Heat it up.
Stir it.
Crush it.
All of the above.
- 18. Multiple Choice
Consider the following table. Which sample will take the longest amount of time to dissolve?
0002
0005
0006
0008
- 19. Multiple Choice
How would you increase the conductivity of a solution?
Increase the concentration of ions in the solution.
Decrease the concentration of ions in the solution.
Increase the temperature of the solution.
Decrease the temperature of the solution.
- 20. Multiple Choice
Which reaction is an acid-base neutralization reaction?
Mg + 2HCl → MgCl2 + H2
HCl + NaOH → NaCl2 + H2O
SiCl4 → Si2 + 2Cl2
N2 + 3H2 → 2NH3
- 21. Multiple Choice
Zn + CuCl2 --> ZnCl2 + Cu
This is a __________ reaction and the products are ________________.
single replacement; zinc and copper chloride
double replacement; zinc and copper chloride
single replacement; zinc chloride and copper
double replacement; zinc chloride and copper
- 22. Multiple Choice
Zoe performs an experiment in which she adds 12.0 grams of zinc metal to 35.0 grams of bromine. She claims that mass will be conserved during the reaction. Which of the following BEST supports her claim?
The mass of the final product will be equal to the mass of the zinc metal, 10.0 grams.
The mass of the final product will be equal to the difference between the two masses, 12.0 grams.
The mass of the final product will be equal to the mass of the bromine, 35.0 grams.
The mass of the final product will be equal to the total mass of both reactants, 47.0 grams.
- 23. Multiple Choice
Which grouping of the three phases of bromine is listed in order of increasing average distance between molecules?
gas, liquid, solid
solid, liquid, gas
liquid, solid, gas
solid, gas, liquid
- 24. Multiple Choice
Which type of energy is associated with the random motion of the particles in a sample of gas?
nuclear energy
chemical energy
electromagnetic energy
kinetic energy
- 25. Multiple Choice
___ Na2S + ___ HCl --> ___NaCl + ____ H2S
When the following equation is balanced, what is the coefficient that goes in front of the NaCl?
3
2
1
4
- 26. Multiple Choice
0 degrees celsius
20 degrees celsius
70 degrees celsius
40 degrees celsius
- 27. Multiple Choice
Is the following substance showing water?
Yes
No
- 28. Multiple Choice
What happens when a substance melts?
It changes from solid to liquid, and heat is absorbed.
It changes from liquid to solid, and heat is absorbed.
It changes from liquid to solid, and heat is released.
It changes from solid to liquid, and heat is released.
- 29. Multiple Choice
BC
CB
DE
ED
- 30. Multiple Choice
List all the segments of the heating curve where gas particles are present.
B --> C
B --> C and C --> D
D --> E
D --> E and E -->F
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