Zusammenfassung der Ressource
Frage 1
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What is the ability to dissolve in water and to conduct electricity ?
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physical properties
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chemical properties
Frage 2
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Water is an example of ...
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an element
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a homogeneous mixture
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a compound
Frage 3
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When matter changes the most common form of energy released or absorbed is ELECTRICAL ENERGY
Frage 4
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New substances are always formed when matter undergoes a
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Chemical Change
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Physical Change
Frage 5
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Chemical energy is the energy
Frage 6
Frage 7
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What is a chemical property?
Frage 8
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What is an element?
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pure substances that cannot be broken down into other substances
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pure substances that are able to break down into other substances
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substances that turn into compounds when combined
Frage 9
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What does the law of conservation of matter state.
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matter cannot be created or destroyed
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matter cannot be created but it can be destroyed
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matter can be created but it can't be truly destroyed
Frage 10
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What is an endothermic reaction?
Frage 11
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What are the three ways that compounds and mixtures differ?
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When elements are combined they form compounds having properties different from the uncombined elements each substance in a mixture has individual properties. Also, the parts of a mixture are not combined in a set ratio.
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When elements are combined they form compounds having properties different from the uncombined elements each substance in a mixture has individual properties. Also, the parts of a mixture are combined in a set ratio.
Frage 12
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How does a physical change differ from a chemical change?
A physical change change in shape but is the same substance after the change. However the chemical change turns into a new substance.
Frage 13
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How are changes in matter related to changes in energy?
Changes in matter are related to changes in energy because the substances change.
Frage 14
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How do you know that the burning of candle wax is an exothermic change?
The burning of candle wax is an exothermic change because it produces carbon dioxide,water, and heat.
Frage 15
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If two mixtures are mixed and the temp rises, did it absorb or release thermal energy?
It realeased thermal energy because the heat was let out and made the temperature rise.
Frage 16
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What is the ratio of phosphorus atoms to oxygen atoms in the compound?
The ratio is two to four