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In science, a law is:
A rule governing what you are permitted to do.
A generalization about how the physical universe works.
A legal document that describes a rule of conduct.
A statute enacted by a legislative body.
What is true of a substance with a lot of mass?
It contains a lot of matter
It has a large volume
It has a high density
It has a low frequency
The law of conservation of mass says substances can neither be _______ nor ___________.
Built; torn down
Blended together; separated
How is weight different from mass?
Weight changes depending on gravity; mass stays constant throughout the universe.
Weight is measured in grams; mass is measured in newtons.
Weight can be converted to energy; mass cannot.
Weight is measured with a scale; mass is measured with a triple-beam balance.
Sodium and chlorine combine to form sodium chloride, or table salt. Sodium and chlorine are:
When sodium and chlorine combine to form sodium chloride, sodium chloride is the:
4 grams of hydrogen and 32 grams of oxygen will combine to form:
36 grams of water
28 grams of hydroxide
32 grams of oxygen
36 grams of deuterium
In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?
What was Antoine Lavoisier's contribution to the law of conservation of mass?
He was the first person to think of it
He was the first person to propose it in a scientific way
He came up with a widely-read, precise description
He was the first person to perform a chemical reaction
Which of the following describes a chemical reaction?
Oxygen interacts with iron to form rust
Ice melts into water
Carbon dioxide freezes to make dry ice
Rocks split apart over many years due to weathering