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To identify or compare substances, scientists often study the substances' characteristic properties. A substance's characteristic properties are always the same, even if the amount of the substance changes. This is because characteristic properties depend only on the substance's chemical structure.
One characteristic property of a substance is its melting point. Melting point is the temperature at which a substance changes from solid to liquid. The melting point of a substance is higher when its molecules are more strongly attracted to one another. The strength of these attractions depends on the substance's chemical structure.
The following passage describes a person making soap through saponification.
Sam is making soap at home using the saponification reaction. Her soap recipe uses coconut oil. The melting point of coconut oil is 76°F.
Sam is making the soap in her kitchen, where the temperature is currently 82°F.
Which of the following statements are true? Select all that apply.
What do these two changes have in common?
baking an apple pie
rust forming on a metal gate
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What do these two changes have in common?
milk going sour
acid rain weathering a marble statue
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What do these two changes have in common?
roasting a marshmallow over a campfire
melting glass
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What do these two changes have in common?
an engine using gasoline to power a car
a penny tarnishing
Select all that apply.
What do these two changes have in common?
cellular respiration
a slice of banana turning brown
Select all that apply.
What do these two changes have in common?
an old sandwich rotting in a trashcan
bleaching clothes
Select all that apply.
What do these two changes have in common?
a copper statue turning green
firing a clay pot in a hot kiln
Select all that apply.
What do these two changes have in common?
a banana getting ripe on the counter
chemicals in a battery reacting to power a flashlight
Select all that apply.
What do these two changes have in common?
chicken cooking in an oven
dry ice sublimating and becoming a gas
Select all that apply.
What do these two changes have in common?
photosynthesis
silver jewelry tarnishing
Select all that apply.