Which property of matter is an extensive, rather than an intensive, property of matter?(1 point)
Mass
Why is it difficult to classify dissolving as simply a physical or a chemical change?(1 point)
Responses
Some substances taste the same after they dissolve, and others do not.
Some substances taste the same after they dissolve, and others do not.
Some substances keep the same color when they dissolve, and others do not.
Some substances keep the same color when they dissolve, and others do not.
Some substances release energy when they dissolve, and some absorb energy.
Some substances release energy when they dissolve, and some absorb energy.
Some substances keep the same molecular structure when they break down, and others do not.
Some substances keep the same molecular structure when they dissolve, and others do not.
While camping, you make a snack over a campfire. You roast a marshmallow over the campfire until it is browned and put it between some chocolate and graham crackers. When you take a bite, you notice that the chocolate and marshmallow have melted slightly.
Which statement correctly identifies a part of this process as a physical or a chemical change?
The melting of the chocolate and marshmallow is a physical change.
Which term best describes a milkshake that contains pieces of chocolate cookies?(1 point)
Responses
pure substance
pure substance
homogeneous mixture
homogeneous mixture
compound
compound
heterogeneous mixture
heterogeneous mixture
Which list only includes terms that describe water?(1 point)
Responses
compound, molecule, pure substance
compound, molecule, pure substance
compound, element, molecule
compound, element, molecule
compound, mixture, molecule
compound, mixture, molecule
compound, element, pure substance
compound, molecule, pure substance
An extensive property of matter is a property that depends on the amount of matter present. In contrast, an intensive property of matter is a property that does not depend on the amount of matter.
One example of an extensive property of matter is mass. The mass of an object increases with the amount of matter present. So, if you have two objects with the same composition but different masses, their masses would be different extensive properties of matter.
To determine whether a property is extensive or intensive, you need to look at how it changes when the amount of matter changes. If the property varies depending on the amount of matter, it is an extensive property. If the property remains constant regardless of the quantity, it is considered an intensive property.