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WorksheetsHonors Semester 1 Review
Total questions: 40
Worksheet time: 20mins
A plastic toy with a mass of 18 grams occupies 9.0 cm3 of space. Its density is
2.0 g/cm3
0.3 g/cm3
6.0 g/cm3
1.5 g/cm3
1. A graduated cylinder contains 30 mL of water. You place an object into the cylinder and the water level rises to 52 mL. What is the volume of the object?
52 mL
22 mL
30 mL
82 mL
What is the dependent variable for the Energy vs Extent of Reaction Graph?
Amount of Energy
Extent of Reaction
Time
All of the above
What is the independent variable for the Energy vs Extent of Reaction Graph?
Amount of Energy
Pathway
Extent of Reaction
Speed
A scientific explanation supported by much evidence collected over a long period of time is a
theory.
hypothesis.
law.
deduction.
Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.
The special juice is the
conclusion.
significant difference.
control variable.
experimental variable.
Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.
Which of the following could be considered control variables?
the amount of workers, the task
The task, the amount of staples
The special juice, the task
All of the above
A substance made of two or more elements that cannot be separated by physical means is called a
homogeneous mixture.
compound.
heterogeneous mixture.
multi-element.
Condensation occurs when
a gas changes to a liquid.
a solid changes to a liquid.
a liquid changes to a gas.
a gas changes to a solid.
List the phases of water in order, from the phase with the fastest molecular movement to the phase with the slowest molecular movement
Solid-Liquid-Gas
Liquid-Solid-Gas
Gas-Liquid-Solid
Gas-Solid-Liquid
Which one of the following is a not a false statement?
In the gas state, molecules move around freely.
Gas molecules move more slowly as they are heated.
Liquids do not change shape easily.
All of the above.
An engineer searching for a material to develop a new kind of "indestructible" eyeglass frame would desire what characteristics?
Low brittleness, high hardness, high elasticity.
Low elasticity, high brittleness.
High hardness, high elasticity, high brittleness.
High brittleness, low hardness, low elasticity.
The density of a 15-gram cube of wood measuring 2.0 centimeters on an edge is
1.9 g/cm3
4.7 g/cm3
0.64 g/cm3
19 g/cm3
The change which is a physical change is
Formation of CO2 from NaHCO3.
burning a piece of paper.
formation of water from oxygen and hydrogen.
melting of an ice cube.
Do any of the atom diagrams below represent atoms of the same element?
ATOM A: 12 protons, 12 neutrons, 12 electrons
ATOM B: 12 protons, 12 neutrons, 10 electrons
ATOM C: 8 protons, 12 neutrons, 12 electrons
Yes, all of the atoms are the same element.
No, they are all different elements.
Yes, atom A and atom Bare the same element.
Yes, atom A and atom C are the same element.
The charge on a complete atom is equal to
the number of neutrons.
the number of protons.
zero.
the number of electrons.
Why don' t all the electrons in an atom fall to the lowest energy level?
The nucleus repels the electrons.
Electron s move so fast they quickly bounce out of the lowest energy level.
Gravity won' t allow it.
The lowest energy level can only hold 2 electrons.
Which of the following is evidence that a chemical change has occurred?
A material changes color from blue to red.
The temperature of a material changes from l0°C to 20°C.
A precipitate is formed.
All of the choices.
The periodic table notation for gold (AU) is shown . An atom of gold has how many electrons?
Cannot be determined with the information given.
14 or 15
79
78 or 68
According to the periodic table, which group are the chemical elements that belong to the Alkaline Earth Metals?
2
1
18
17
According to the periodic table, the group known as the Nobel Gasses include the element
sodium.
krypton.
chlorine.
calcium.
Using the periodic table, metal elements belong to groups
13-18
10-15
3 -12
1- 12
Select the element with the correct Lewis Dot structure.
The number of valence electrons in an atom of Oxygen, atomic number 8, is
2
6
3
4
How many atoms of aluminum (Al), sulfur (S), and oxygen (0) are in each molecule of Al2(SO4) 3?
2-aluminum, 1-sulfur, 4-oxygen
I-aluminum, 3-sulfur, 4-oxygen
2-aluminum, 3-sulfur, 12-oxygen
2-aluminum, 3-sulfur, 3-oxygen
Covalent bonds form
molecules.
only between pairs of atoms.
between oppositely charged atoms.
by sharing electrons.
The Na atom becomes the ion, Na1 + when it
gains 1 proton.
gains 1 electron.
loses1 electron.
loses 1 proton.
24. Balance the following equation to demonstrate the conservation of atoms in a reaction. Choose the answer which provides the correct coefficients for each reactant and product.
__H2O2 à _H2O + ___O2
(2, 1, 1)
(2, 2, 1)
(2, 3, I)
(1, 2, 3)
In the chemical equation, 2HCl + Ca(OH)2 àCaCl2 + 2H2O, the number of atoms of product is
9.
3.
5.
2.
A molecule added to a chemical reaction to increase the rate of the reaction without being used up in the process is known as a(n)
reactant.
inhibitor.
catalyst.
product.
If you Increase the temperature, what happens to the dissolving rate of NaCl in water?
The dissolving rate decreases because more collisions occur between solute and solvent.
No collisions occur between solute and solvent, so the rate goes to zero.
The dissolving rate increases because more collisions occur between solute and solvent.
The dissolving rate decreases because fewer collisions occur between solute and solvent.
Suppose you crushed a aspirin tablet before dissolving it in a glass of water. The crushed aspirin tablet would
dissolve more quickly than a whole aspirin tablet.
take more time to dissolve than a whole aspirin tablet.
dissolve more slowly than a whole aspirin tablet.
take the same amount of time to dissolve as a whole aspirin tablet.
Acids
All of the below.
have a pH less than 7.
are represented as H+.
usually decrease the pH value when added to a solution.
Bases
usually increase the pH value when added to a solution.
are represented as OH-.
All of the these.
have pH greater than 7.
Which of the pairs of graphs represents an automobile that is accelerating
4
3
2
1
What is the speed of a jet plane that travels 5,000 meters in 10 seconds?
5,000 m/s
50,000 m/s
50 m/s
500 m/s
A racecar rounds a curve on the track at a constant speed of 180 mph. Is the car accelerating?
No, its mass is constant.
Yes, its speed is changing.
No, its speed is constant.
Yes, its direction is changing.
The tires on a car have grooves in them. How do these grooves affect the friction between the tires and the road during wet weather?
They increase friction.
They have no effect on friction.
They first decrease, then increase friction.
They decrease friction.
Compared to your weight and mass on Earth, if you were on the moon
our weight would increase, but your mass would remain the same.
your weight would be less but your mass would remain the same.
your weight would remain the same, but your mass would be less.
your weight and mass would be less.
A 30-kg dog on ice skates is accelerating at 3 m/s2• What is the net force on the dog?
90 N
10 N
0.1 N
30 N
