Science 6 Chapter 1 Test Set C Question Preview (ID: 38467)
Chapter 1 Test.
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A change in state is a(n)
a) chemical change
b) physical change
c) endothermic reaction
d) exothermic reaction
In electrolysis, water is separated into two substances; hydrogen and oxygen. Is this a physical or chemical change?
a) Physical because water can change form without changing substance.
b) Chemical because two new substances were created.
c) Physical because separation is a physical change.
d) Chemical because hydrogen and oxygen mix to make water.
Which kind of reaction absorbs heat and cools down?
a) endothermic
b) exothermic
c) chemical
d) physical
If you have an unknown liquid, how could you find out if it is water?
a) Smell it
b) Taste it
c) Determine its density
d) See if it can dissolve salt
Which kind of reaction releases energy and heats up?
a) endothermic
b) exothermic
c) chemical
d) physical
How are a mixture and a compound different?
a) A mixture can be made of any kind of matter
b) A compound is held together by chemical bonds
c) A compound can be heterogeneous or homogeneous
d) A mixture is made of one kind of matter
When do you need to use a graduated cylinder to find density?
a) When the object is a rectangular solid
b) When the object has an irregular shape
c) When the object is a liquid
d) When the object is a solid
What's the density of a substance that has a volume of 20 cubic centimeters and a mass of 54 grams?
a) 2.7 grams/cubic centimeter
b) 0.37 grams/cubic centimeter
c) 34 grams/cubic centimeter
d) 27 grams/cubic centimeter
Ice has a density of 0.9 g/mL. Water has a density of 1.0. Which is more dense?
a) Ice because the density is lower.
b) Water because the density is higher.
c) They are the same because they are the same substance just in different states.
d) Water because the density is lower.
If steel has a density of 7.8 g/mL and silver has a density of 10.5, if you had the same volume of each substance, which would have a greater mass?
a) Steel, because steel is heavier than silver.
b) Silver, because silver has a greater density.
c) Steel, because more steel fits in the same volume.
d) Silver, because silver is lighter than steel.
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