1
2
3
4
100
Which of the following methods should be used to determine whether a substance is a mixture or a compound?
A. titration
B. combustion
C. physical separation
D. chemical decomposition
C. physical separation
100
Which of the following is NOT a solution?
A. vegetable oil
B. chocolate milk
C. liquid soap
D. cherry popsicle
A. vegetable oil
100
A student fills a pot with ice cubes from the freezer, then places the pot on the stove on high heat. The ice eventually melts to boiling water, releasing steam. Regarding the phase changes observed, which of these statements are true?
Select TWO correct answers.
A. The original phase was solid, and the final phase of the steam was gas.
B. Heat was generated throughout this process.
C. The process of evaporation has occurred.
D. This process is an example of a chemical change.
E. The resultant phase for water had slower-moving atoms than the beginning phase.
A. The original phase was solid, and the final phase of the steam was gas.
C. The process of evaporation has occurred.
100
How is a gas different from a liquid?
A. Gases have a set volume and absolute shape, while liquids have neither.
B. Gases have no set volume or shape, while liquids have both.
C. Gases have no set volume or shape, while liquids have a set volume.
D. Gases have a set volume and absolute shape, while liquids have a set volume.
C. Gases have no set volume or shape, while liquids have a set volume.
200
Bowl 1 contains soup and Bowl 2 contains fruit salad. Which statements below BEST DESCRIBE the substances in Bowl 1 and Bowl 2?
Select TWO correct answers.
A. Bowl 2 contains a solution.
B. Bowl 1 contains a gas.
C. Bowl 1 contains a solution.
D. Bowl 2 contains a mixture.
E. Bowl 1 contains a solid.
C. Bowl 1 contains a solution.
D. Bowl 2 contains a mixture.
200
Beach sand is made of small, worn rocks and fragments of shells and sponges. This means that beach sand is —
A. a solid
B. a mixture
C. a compound
D. unstable
B. a mixture
200
Phase changes in matter occur continually.
Complete the following statements regarding phase changes by moving the answers to the correct boxes.
Adding energy can increase the rate of __________.
Adding energy will ___________ the motion of molecules.
choices: condensation, evaporation, increases, decreases
evaporation
increases
200
A scientist obtains a microscopic view of a certain substance. She finds evidence of the molecules in a regular pattern that is rigid, the particles cannot slide past one another. She must be observing which state of matter?
A. solid
B. liquid
C. gas
D. plasma
A. solid
300
Beaker 1 contains salt water and Beaker 2 contains sugar water. What do both beakers contain? (Choose the most descriptive answer).
A. solids
B. solutions
C. mixtures
D. gases
B. solutions
300
Air is composed of a variety of gases needed for survival here on the Earth. Select the appropriate terms to describe air and its components in the statement below.
While air is considered to be a ___________ , components of air such as oxygen or nitrogen are each considered to be a ____________.
choices: heterogenous-homogenerous-pure substance-compound-solution
homogenerous mixture
pure substance
300
Patrick's 6th-grade science class is making ice cream with their table groups. The group placed their ice cream mixture in a bag of rock salt and ice, which created a chemical reaction that froze the mixture in a matter of minutes.
Which of the following best explains the changes that occurred on a molecular level?
Energy is __removed or added__ from the molecules in the ice cream mixture, causing them to expand and _speed up or slow down__, hardening into a solid.
removed-slow down
300
Which statement about states of matter is most correct?
A. All states of matter have particles that are tightly packed and vibrate with little motion.
B. Only liquids and gases have little space between particles and are therefore not easily compressible.
C. Solids and gases both assume the shape of the container that they are placed in.
D. Gases are the only compressible state of matter.
D. Gases are the only compressible state of matter.
400
Students are comparing two mixtures. The first mixture is of sand and water, while the second mixture is of sugar and water.
Which of the mixtures is also a solution?
A. Neither mixture is a solution.
B. The sand and water mixture is a solution.
C. The sugar and water mixture is a solution.
D. Both mixtures are solutions.
C. The sugar and water mixture is a solution.
400
Some students were studying different types of mixtures. They stirred together one cup of oil and one cup of water in a large glass beaker. They observed that the water settled to the bottom and the oil floated to the top. Which of the following does this investigation demonstrate?
A. The oil completely mixed with the water.
B. The oil maintained its physical properties.
C. The oil caused the water to become more dense.
D. The oil melts in water.
C. The oil caused the water to become more dense.
400
The diagram below shows two gases in closed jars. Both identical jars have the same number of molecules.
Using the table and diagram above, which gas has a higher temperature?
Sample (Mass) Average particle speed A 51 u860 m/s
B 44 u810 m/s
A. sample A
B. sample B
C. neither; the molecules are held at the same temperature
D. the samples cannot be compared because they are two different gases
A. sample A
400
What are some characteristics that make up a liquid?
Select TWO correct answers.
A. Liquids have fixed volume, but no fixed shape.
B. Liquids have particles that move very rapidly.
C. Liquids have particles that are very close to one another.
D. Liquids can be compressed into a smaller volume.
E. Liquids do not fill a container completely like gases would.
A. Liquids have fixed volume, but no fixed shape.
E. Liquids do not fill a container completely like gases would.
500
A _____________ is s combination of two or more substances that keep their own identities. Because they keep their own identities, this is called a _____________ . This occurs when no new substances are formed. A ____________ is a combination of two or more substances that are dissolved into each other. A _____________ is the smaller part that is dissolved. A ____________ is the largest part in which the other parts are dissolved.
Choices: Solute Mixture Solvent Physical Change Solution
MIXTURE
PHYSICAL CHANGE
SOLUTION
SOLUTE
SOLVENT
500
Pair each phenomena with its correct change in state of matter.
solid to liquid
liquid to gas
gas to liquid
liquid to solid
solid to liquid-Melting
liquid to gas-Evaporation
gas to liquid-Condensation
liquid to solid-Freezing
500
A change in the state of matter of an object requires which of the following?
A. energy
B. vibration
C. water
D. collision
A. energy
500
The particles of which state of matter would have the lowest kinetic energy?
A. solid
B. liquid
C. gas
D. all of the above
A. solid