What is the ability to dissolve in water and to conduct electricity ?
Responda
physical properties
chemical properties
Questão 2
Questão
Water is an example of ...
Responda
an element
a homogeneous mixture
a compound
Questão 3
Questão
When matter changes the most common form of energy released or absorbed is ELECTRICAL ENERGY
Responda
True
False
Questão 4
Questão
New substances are always formed when matter undergoes a
Responda
Chemical Change
Physical Change
Questão 5
Questão
Chemical energy is the energy
Responda
stored in the bonds between atoms
of moving, electrically charged particles
Questão 6
Questão
What is matter?
Responda
anything that has mass but doesn't take up space
anything that has mass and takes up space
Questão 7
Questão
What is a chemical property?
Responda
properties that change into different substances
properties that shange shapes and substances
Questão 8
Questão
What is an element?
Responda
pure substances that cannot be broken down into other substances
pure substances that are able to break down into other substances
substances that turn into compounds when combined
Questão 9
Questão
What does the law of conservation of matter state.
Responda
matter cannot be created or destroyed
matter cannot be created but it can be destroyed
matter can be created but it can't be truly destroyed
Questão 10
Questão
What is an endothermic reaction?
Responda
change in which heat is taken
change in which energy is taken
Questão 11
Questão
What are the three ways that compounds and mixtures differ?
Responda
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.
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.
Questão 12
Questão
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.
Responda
True
False
Questão 13
Questão
How are changes in matter related to changes in energy?
Changes in matter are related to changes in energy because the substances change.
Responda
True
False
Questão 14
Questão
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.
Responda
True
False
Questão 15
Questão
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.
Responda
True
False
Questão 16
Questão
What is the ratio of phosphorus atoms to oxygen atoms in the compound?
The ratio is two to four
Responda
True
False
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