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 The picture below shows Kelsey's glass of ice water.Which of the following is correct about Kelsey's glass of ice water? |
A. It is a mixture because ice and water are two different things in two different states.
B. It is a mixture now because the water and ice can be seen in the glass, but it will not be a mixture when the ice cubes melt. C. It is not a mixture now because the ice is floating on the water, but it will be a mixture when the ice cubes melt. D. It is not a mixture because ice and water are the same substance in two different states. |
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Which of the following describes the difference between the motion of liquid water and
water vapor? |
A. The particles in the liquid do not move, but the particles in a gas can move back and
forth. B. The motion of the particles is the same in both states, but they move slower in the gas state. C. The particles in a gas can slide past each other, while the particles in a liquid are locked in place. D. The particles in a liquid can slide past each other, while the particles in a gas are free to move in all directions. |
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What is the most likely reason that the red liquid inside of a thermometer moves up when it
is heated? |
A. The particles in the red liquid move faster and come together.
B. The particles in the red liquid move faster and spread apart. C. The particles in the red liquid move slower and come together. D. The particles in the red liquid move slower and spread apart. |
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Elizabeth has two separate samples of the same substance. One sample is in the liquid
state, and the other is in the solid state. The two samples most likely differ in which property? |
A. the chemical bonds between atoms within the substances
B. the types of atoms that are found within the substances C. the motion of the atoms within the substances D. the size of the atoms within the substances |
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Which of the following is an example of a container that is filled with a pure substance
rather than a mixture? |
A. a tire filled with air
B. a jar filled with salt water C. a balloon filled with helium D. a glass filled with chocolate milk |
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Which of the following statements describes a difference between a mixture and a pure
substance? |
A. A mixture tends to be homogeneous, while a pure substance tends to be
heterogeneous. B. A mixture has a specific melting point, while the melting point of a pure substance can vary. C. The density of a mixture can change with temperature, but the density of a pure substance cannot change. D. The composition of a mixture can vary from sample to sample, but the composition of a pure substance is always the same. |
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On a warm sunny afternoon, ocean water splashed onto a rock. A short time later, the rock
was dry. Which statement best explains what happened to the water on the rock? |
A. Heat caused the water to become a gas.
B. Heat melted the water and it disappeared. C. Salt caused the water to become a gas. D. Salt melted the water and it disappeared. |
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If a certain mixture is homogeneous, you would probably conclude that the physical
properties and the composition: |
A. are different from one part of the sample to another
B. vary smoothly from the top to the bottom of the sample C. are the same in every small volume from the sample D. are visibly different throughout the sample |
