1
2
3
4
5
100
A student made the table below to record his observations when mixing baking soda and vinegar in a beaker
The best evidence for the formation of a new substance is the observation of the —
The best evidence for the formation of a new substance is the observation of the —
A. solid settling.
B. solid disappearing.
C. liquid remaining clear.
D. bubbles forming.
D. bubbles forming.
100
In which of the following processes does a new substance form?
A. Burning
B. Evaporating
C. Cooling
D. Crushing
A. Burning
100
All of the following are chemical changes EXCEPT —
A. digesting beef.
B. corroding metal.
C. folding paper.
D. burning wood.
C. folding paper.
100
Lewis has two spheres made of different substances. Sphere A has a volume of 19.4 cubic centimeters and a mass of 24.0 grams. Sphere B has a volume of 17.0 cubic centimeters and a mass of 13.6 grams. Lewis knows that the density of water is 1.0 grams/cubic centimeter. If Lewis places both spheres in a tub of water, which will float?
A. Sphere A will float, because it is less dense than Sphere B.
B. Sphere A will float, because it has more mass than water.
C. Sphere B will float, because it has less mass than Sphere A.
D. Sphere B will float, because it is less dense than water.
D. Sphere B will float, because it is less dense than water.
100
Two objects have the same mass. Which object has greater density?
A. The object that has greater density is the object with the larger volume.
B. The object that has greater density is the object with the smaller volume.
C. The object that has greater density is the object with the larger diameter.
D. The object that has greater density is the object with the higher temperature.
B. The object that has greater density is the object with the smaller volume
200
Which of the following describes a chemical change?
A. Water goes from liquid to gas when boiling
B. Ice goes from solid to liquid when melting
C. Gray iron turns reddish-brown when rusting
D. Steam loses heat when condensing
C. Gray iron turns reddish-brown when rusting
200
Which of the following is an example of a chemical change?
A. Dissolving sugar
B. Crushing a can
C. Frying an egg
D. Melting gold
C. Frying an egg
200
Which of the following is NOT a chemical change?
A. Sugar dissolving in water
B. Fire burning paper
C. Souring milk
D. Rusting metal
A. Sugar dissolving in water
200
Enrique has a small jar of liquid and two cubes made of different substances. The volumes and masses of the liquid and the two cubes are listed in the table below.
Volume (cm3)Mass (g)LiquidCube ACube B14.012.029.014.011.07.0
If both cubes are placed in the liquid, what will happen to the cubes?
A. Cube B will float, and Cube A will sink.
B. Cube A will float, and Cube B will sink.
C. Both cubes will float.
D. Both cubes will sink.
C. Both cubes will float.
200
Mrs. Rolen's favorite drink
Dr. Pepper
300
In a controlled experiment, acid was dropped on a sample of calcite. Which of the following results would show that a chemical reaction took place?
A. The sample of calcite formed a wet puddle on its surface.
B. The sample of calcite had partially dissolved.
C. The sample of calcite formed bubbles, showing a release of gas.
D. The sample of calcite broke into smaller pieces.
C. The sample of calcite formed bubbles, showing a release of gas.
300
Which of the following is NOT an indicator of chemical change?
A. Formation of a gas
B. Formation of a solid
C. Change in texture
D. Change in color
C. Change in texture
300
The table below describes two experiments.
What can the student conclude about the experiments?
What can the student conclude about the experiments?
A. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.
B. Experiments 1 and 2 show physical changes because no new substances were produced.
C. Experiment 1 shows a chemical change because bubbles were produced, and experiment 2 shows a physical change because a liquid turned into a solid.
D. Experiments 1 and 2 show chemical changes because bubbles were produced.
A. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.
300
The diagrams show the dimensions of several blocks made of different materials.
What additional information is needed to determine which blocks will float in a tub of water?
What additional information is needed to determine which blocks will float in a tub of water?
A. mass of the blocks
B. conductivity of the blocks
C.volume of the water in the tub
D. temperature of the water in the tub
A. mass of the blocks
300
How many school days until Thanksgiving break?
16
400
When Bobby and his parents first moved into their house, the brick fireplace was very clean. Now that they have built a few fires in their fireplace, the inside is covered with black powder. Bobby's mother tells him that this powder is called soot. Which of the following best explains how the soot came to be in the fireplace?
A. A chemical reaction occurred when the wood burned, making a new substance called soot.
B. A chemical reaction occurred between the bricks and air, making a new substance called soot.
C. The wood in the fireplace evaporated, making a new substance called soot.
D. Some of the bricks in the fireplace melted, making a new substance called soot.
A. A chemical reaction occurred when the wood burned, making a new substance called soot.
400
Which of the following is an indicator of chemical change?
A. Change in shape with the application of some type of force
B. Change in temperature with no outside heat source applied
C. The formation of a solid due to freezing
D. The formation of a gas due to evaporation
B. Change in temperature with no outside heat source applied
400
Which would be considered evidence that a chemical change has occurred?
Pick two correct answers.
A. A gas is produced.
B. A change in size occurs.
C. A precipitate is formed.
D. A change of state occurs.
E. A different shape is formed.
A. A gas is produced.
C. A precipitate is formed.
400
Gavin has a block of wood that floats in water. The gravity on the Moon is approximately one-sixth of the gravity on Earth. If the wood and water were transported to the Moon, what would happen to the block of wood?
A. The block would sink to one-sixth of the depth of the water.
B. The block would sink to the bottom of the water.
C. The block would float on top of the water.
D. The block would float out of the water.
C. The block would float on top of the water.
400
The following question has two parts. First, answer Part A. Then, answer Part B.
Part A:
A student collects the following data on two unknown substances.
SubstanceMass (g)Volume (cm3)A228B78Then, the student compares the data with the information in the table below to determine the identity of each substance.
SubstanceDensity (g/cm3)Aluminum2.7Steel7.8Nickel8.9Silver10.5What are the calculated densities of each substance?
A. The density of Substance A is 7.5 g/cm3, and the density of Substance B is 2.8 g/cm3.
B. The density of Substance A is 2.8 g/cm3, and the density of Substance B is 8.8 g/cm3.
C. The density of Substance A is 10.0 g/cm3, and the density of Substance B is 7.5 g/cm3.
D. The density of Substance A is 8.8 g/cm3, and the density of Substance B is 10.0 g/cm3.
B. The density of Substance A is 2.8 g/cm3, and the density of Substance B is 8.8 g/cm3.
500
Hana has cut up some apples for a fruit salad. She puts a few apple slices on a plate for a snack, and puts the rest in a bowl of water. After a few minutes, she notices that the apples on the plate have turned brown, but the ones in the bowl have not changed color. Which of the following best describes what happened?
A. The air is warmer than the water, causing the apples to burn slightly.
B. The brown part of the apples mixes with water to make a clear solution.
C. The air reacts chemically with the apples, but water does not.
D. The apples appear darker in air because air emits more light than water.
C. The air reacts chemically with the apples, but water does not.
500
A student makes the list below to show her observations of a fireworks show.
Fireworks
I. Many colors are produced
II. Bright light is given off
III. Smoke is produced
IV. Heat is released
V. Loud sounds are produced
Which of the observations indicate that a chemical change has occurred?
Fireworks
I. Many colors are produced
II. Bright light is given off
III. Smoke is produced
IV. Heat is released
V. Loud sounds are produced
Which of the observations indicate that a chemical change has occurred?
A. III, only
B. IV and V, only
C. I, II, III, IV, and V
D. I, II, III, IV, only
D. I, II, III, IV, only
500
Jonathan wants to find the density of a lead fishing weight. He measures the weight's mass at 342.0 grams. He then puts the lead weight into a graduated cylinder filled with 200 cubic centimeters of water. He sees that the water level rises to 240.0 cubic centimeters. What is the density of the lead weight in grams per cubic centimeter to the nearest hundredth?
8.55
240-200=40
342.0 divided by 40=8.55
500
Natasha measures the masses of three objects and records her results in the table.
What should Natasha do next to determine the densities of the objects?
A. She should measure the circumference of each object.
B. She should measure the surface area of each object.
C. She should measure the temperature of each object.
D. She should measure the volume of each object.
D. She should measure the volume of each object.
500
Carl has three cubes made of different materials. All the cubes have the same dimensions. Which of the following is true?
A. The cube that is the least dense has the lowest temperature.
B. The cube that is the most dense has the largest mass.
C. The colors of all of the cubes are the same.
D. The masses of all the cubes are the same.
B. The cube that is the most dense has the largest mass.