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Terms in this set (20)
A ________ property is a characteristic of a substance that can be observed and does not change the identity of the substance.
is the property of matter in which a substance can transfer heat or electricity.
Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?
Eugene describes the physical property of a material as "sweet and floral." What physical property of the material is Eugene most likely observing?
Which statement best compares and contrasts two physical properties of matter?
Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.
What happens when a substance undergoes a physical change?
Some physical properties change, but the substance keeps its identity.
Which can occur in a physical change?
The particles can arrange in different ways.
When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?
the rearrangement of particles in a physical change
What is an example of a physical change?
ice forming and then melting back into water
Which would show an example of how physical changes are reversible?
melting tin and then cooling it into a mold
Which statement about the physical change of liquid water boiling into steam is true?
The heat added represents an energy change.
Water is made of two hydrogen atoms and one oxygen atom bonded together. Julia is describing how water undergoes a physical change when it boils. She says that the particles shift to be farther apart and that the oxygen and hydrogen separate. She also says that the total mass of the steam is the same as the initial water, and that heat energy was required to cause the change. She finishes her description by saying that the steam can be turned back into water if it is cooled.
Atoms remain bonded to each other in physical changes.
The Statue of Liberty is made of copper that has turned green because it has undergone a change. What can be said about this change?
The change is not a physical change because a new chemical is formed on the outside of the statue.
Which is most likely a physical change?
cutting a substance into four pieces
Which scenarios are examples of physical changes? Check all that apply.
Silicon is cut into tiny pieces for computer chips.
Lead is melted to form pellets.
Liquid water freezes to form ice
When water (H2O) freezes into ice, some of the properties have changed but the ________ of the H2O is the same.
If there is 8 g of a substance before a physical change, how much will there be afterwards?
Wax melts when it is heated. Which most likely describes what is true of the result of this reaction?
The same amount of wax exists before and after the change.
Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?
It will still weigh 15 grams.
The density of solid aluminum is 2.70 . If a 1g peice of aluminum is dropped in a cup of water, it will . (The density of water is 1.00 g/cm3 )
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