1.)convection is the movement of matter that results from differences in density caused by variations in temperature.
a
true
b
false
2.)which of the following types of geologic evidence could give a scientist information about the effects of an asteroid impact on earth's surface?
a
ice cores that show gradual changes in the amount of carbon dioxide in earth’s atmosphere over thousands of years
b
a world map showing the major volcanic eruptions of earth's past
c
a set of petrified trees with tree rings showing several years of stunted growth
d
a set of fossils that show a steady rate of evolution in a certain type of organism
3.)alternating quiet and violent eruptions are associated with which kind of volcano?
a
shield
b
composite
c
pyroclastic
d
cinder cone
4.)an earthquake's magnitude is the effect of the earthquake and how the earthquake is felt by people.
a
true
b
false
5.)convection currents in the mantle contribute to tectonic plate movement. what is convection current?
a
the transfer of energy by direct contact
b
the transfer of energy from a region of lower temperature to a region of higher temperature
c
the transfer of energy by the movement of matter
d
the transfer of energy through a solid, such as the earth's crust
6.)
long ago the eastern part of north america collided with the northern part of africa during the formation of the supercontinent pangaea. later, the two continents separated as pangaea broke apart. which of the following describes what happened when the two continents collided?
a
fault-block mountains formed as a result of compression.
b
folded mountains formed as a result of compressional stress.
c
fault-block mountains formed as a result of tension stress.
d
folded mountains formed as a result of tension stress.
7.)a diamond is a valuable mineral that is made up of carbon atoms arranged in a repeating pattern. this repeating pattern gives diamonds their hardness. which of the following characteristics do diamonds share with all minerals?
a
carbon atom composition
b
extreme hardness
c
rarity and high cost
d
orderly crystal structure