8th Grade Ch 1 Question Preview (ID: 59927)
Matter.
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The fact that matter is not created or destroyed in any physical or chemical change is called the
a) law of conservation of mass
b) law of conservation of energy
c) law of keeping your matter
d) Newton's law
A measure of how hot or cold something is
a) thermal energy
b) temperature
c) heat
d) mass
A change in which energy is absorbed is called a(n)
a) exothermic change
b) physical change
c) endothermic change
d) chemical change
The study of matter and how matter changes
a) physics
b) biology
c) taxonomy
d) chemistry
A single kind of matter that is pure, or always has a specific makeup
a) substance
b) chemicals
c) element
d) compound
A substance that cannot be broken down into any other substances by chemical or physical means
a) compound
b) element
c) substance
d) molecule
A force of attraction between two atoms
a) chemical bond
b) physical bond
c) magnetic bond
d) electrical bond
How many oxygen atoms are in CO2?
a) 1
b) 2
c) 3
d) 0
A combination of two or more substances that are together in the same place, but their atoms are not chemically bonded
a) compound
b) molecule
c) element
d) mixture
Salt water is an example of a
a) homogenous mixture
b) heterogeneous mixture
c) endothermic mixture
d) exothermic mixture
If you went to the Moon, what would change?
a) your weight
b) your mass
c) both your weight and your mass
d) your density
The system that scientists use to measure the properties of matter
a) whatever their countries use
b) the International Measuring System
c) the International System of Units
d) Google
How much space matter occupies
a) volume
b) mass
c) weight
d) density
An object's mass is 12 g and its volume is 6 cm3. What is its density?
a) 84 g/cm3
b) 2 g/cm3
c) 18 g/cm3
d) 6 g/cm3
A melting popsicle is an example of a
a) physical change
b) chemical change
c) exothermic change
d) all of the above
Origami is an example of paper going through a
a) physical change
b) chemical change
c)
d)
Combustion is an example of a(n)
a) exothermic change
b) endothermic change
c)
d)
A group of two or more atoms held together by chemical bonds
a) molecule
b) atom
c) compound
d) element
When elements chemically combine, they form compounds with properties different from those of the elements.
a) true
b) false
c)
d)
A homogenous mixture is all of these except
a) so evenly mixed you can't see the parts
b) difficult to separate
c) you can usually see the different parts
d) can be liquid, gas, or solid
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