Changes to Matter
A student places 100 grams of water and 50 grams of ice into a beaker. Which of the following is the best prediction for the mass of the contents of the beaker after the ice has melted into the water?
A 25 grams
B 50 grams
C 100 grams
D 150 grams
D 150 grams
A Adding a small amount of vinegar to the powder
B Dissolving the powder in a beaker of water
C Testing the electrical conductivity of it in a solution
D Comparing the color of the powder to other powders
A Adding a small amount of vinegar to the powder
Which of the following would provide the best evidence that air is made of matter?
A Making a small hole in a tire and measuring the amount of time it takes for it to become flat
B Comparing the volume of an empty balloon to the volume of an inflated balloon
C Measuring the temperature of the air in several rooms of varying sizes
D Finding the volume of the air between marbles in a jar by pouring water over them
B Comparing the volume of an empty balloon to the volume of an inflated balloon
Which of the following provides the best evidence that a chemical reaction has taken place?
A Water, when boiled, evaporates and turns into vapor.
B Sugar dissolves completely when added to water.
C A liquid becomes a solid when heat is removed.
D Two liquids are mixed, and a solid substance forms.
D Two liquids are mixed, and a solid substance forms.
Matter can alter its form through a chemical change or through a physical change. No matter what the type of change is, every time matter alters its form–
A the matter releases heat energy.
B some of the matter is destroyed.
C new matter will be created.
D the amount of matter is the same.
D the amount of matter is the same.
A student examined four samples of matter and recorded some of their properties. Which of the following is most likely a non-metal?
A Sample A is a shiny solid that conducts heat well.
B Sample B is a dull solid and does not conduct heat well.
C Sample C is good at conducting heat and electricity.
D Sample D is a shiny solid.
B Sample B is a dull solid and does not conduct heat well.
Which of the following is always true about the particles that make up matter?
A They are too small to be seen with only our eyes
B They can only be found in solid substances
C They are the same size in all substances
D They are locked into regular arrangements
A They are too small to be seen with only our eyes
In which of the following mixtures is there evidence that a new substance was formed?
A Blue crystals are mixed into a clear liquid, and the volume of the solution increased.
B A clear liquid is mixed with a yellow liquid, and heat energy is released.
C A salt water solution is boiled, and salt crystals can be seen on the bottom of the container.
D A clear liquid is mixed with a yellow powder, and the powder dissolves completely
B A clear liquid is mixed with a yellow liquid, and heat energy is released.
A student has a dish with a mass of 72 grams. The student places 12 grams of butter in the dish and melts the butter. Which of the following best describes the mass of the dish and butter together before and after the melting?
A Before: 84 g, After 72 g
B Before: 84 g, After 87 g
C Before: 84 g, After 84 g
D Before: 72 g, After 12 g
C Before: 84 g, After 84 g
Testing of an unknown mineral shows that it has a hardness greater than quartz. The unknown mineral could be which of the following?
A Apatite
B Corundum
C Orthoclase Feldspar
D Calcite
B Corundum
Which of the following tools is necessary to examine the particles that make up matter?
A Graduated Cylinder
B Triple Beam Balance
C Hot Plate
D Microscope
D Microscope
In a container, a white solid is mixed with a clear liquid, and the following observations are recorded. •Most of the solid dissolved in the liquid.
•The temperature of the solution decreased.
•The volume of the substance increased.
•Some of the solid remained at the bottom.
Which of the following observations support the conclusion that a new substance was formed?
A Most of the solid dissolved in the liquid.
B The temperature of the solution decreased.
C The volume of the substance increased.
D Some of the solid remained at the bottom.
B The temperature of the solution decreased.
2 A student placed a beaker of water near a window in the classroom and recorded the volume of water in the beaker for three weeks. What volume of liquid water was converted to water vapor that entered the air over the three week period?
Week 1 - Volume 100 mL
Week 3 - Volume 22 mL
A 22 mL
B 78 mL
C 100 mL
D 122 mL
B 78 mL
A sample of an unknown metal that is gray, magnetic, and a good conductor of electricity could most correctly be identified as–
A Iron
B Copper
C Aluminum
D Nickel
A Iron
Some students placed a clear solution in a beaker and heated it for 40 minutes. Their observations are provided.
Time (minutes) Observations
10 Min - Bubbles on the bottom of the beaker are visible
20 Min - Water is rapidly boiling
30 Min - Water level in beaker has decreased
40 Min - White crystals have formed on the edges of the beaker
Evidence that the solution contained matter that could not be seen was observed during what time?
A 10 minutes
B 20 minutes
C 30 minutes
D 40 minutes
D 40 minutes
A chemical reaction is indicated in all of the following situations EXCEPT–
A gas bubbles form when baking soda is added to vinegar.
B a clear liquid becomes solid when heat energy is removed.
C the temperature of a solution decreases when a powder is added.
D a yellow solid forms when two clear liquids are mixed together.
B a clear liquid becomes solid when heat energy is removed.
Your friend is wondering if an ice cube has more mass before or after it melts. What would you tell him?
A An ice cube has the same mass before and after it melts. The state of matter changes, but the amount of matter is the same before and after the change.
B An ice cube has a different mass after it melts. The state of matter changes, but the amount of matter is different before and after the change.
A An ice cube has the same mass before and after it melts. The state of matter changes, but the amount of matter is the same before and after the change.
A mineral is observed to be red in color, and when it was rubbed on an unglazed tile, it left a black streak behind. Based on these observations, which of the following is the correct identification for the mineral?
A Graphite
B Hematite
C Bornite
D Chromite
C Bornite
Matter is everywhere. What evidence do we have to prove this?
Matter is anything that has mass and takes up space. It is everywhere and can exist in a solid, liquid, or gas state.
A solid is mixed with a liquid. Which of the following would indicate that a new substance has been formed?
A Most of the solid dissolves into the liquid after being stirred.
B The color of the mixture is different from the color of the original substances.
C The mass of the mixture is greater than the mass of the solid or the liquid.
D The solid floated on top of the liquid when it was first added.
B The color of the mixture is different from the color of the original substances.