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CRCT Review Earth Science 7


CRCT Review Earth Science 7 2008 CRCT Review Earth Science 7 2008 Chapter 9 CRCT Preparation 1. A student models a volcanic eruption by using a syringe to inject blue ... – PowerPoint PPT presentation

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Title: CRCT Review Earth Science 7

CRCT Review Earth Science 7
  • 2008

CRCT Preparation
Chapter 9
1. A student models a volcanic eruption by using
a syringe to inject blue colored water through a
dome shaped gelatin mold. What is one of this
models most significant limitations? A Gelatin
is clear, whereas actual volcanoes are opaque. B
Gelatin does not accurately simulate the
materials of which actual volcanoes are made. C
Actual volcanoes have red lava, not blue. D
Actual volcanoes erupt with more force than a
CRCT Preparation
Chapter 9
2. When a volcanic explosion fills the atmosphere
with a large amount of volcanic ash, which of the
following is a likely result? A The average
global temperature will decrease. B The average
duration of a day will become shorter. C Ocean
tide levels will be affected. D Only the area
near the volcano will be affected.
CRCT Preparation
Chapter 9
Use the illustration to answer question 3.
3. What is the term for the area to which the
arrow is pointing? A lava B crater C vent D magma
CRCT Preparation
Chapter 9
4. Which of the following situations represents
the greatest amount of potential energy? A A
large bolder is blown into the air by an
explosive eruption. B Low viscosity lava flows
quickly downhill. C A huge boulder is perched
atop a cliff and is on the verge of falling 1000
m to the ground below. D A tree that was blown
over by a powerful eruption lies flat on the
CRCT Preparation
Chapter 9
5. A model of a volcano that uses vinegar and
baking soda is limited because A the eruption is
unpredictable. B baking soda is white, while lava
is red. C real volcanoes are much larger than the
model. D most volcanoes are extinct.
CRCT Preparation
Chapter 9
6. In which of the following situations would
there be the greatest amount of kinetic energy? A
just prior to eruption, when incredible pressure
has built up inside a volcano B during an
explosive eruption in which pyroclastic material
is blown high into the atmosphere C just after an
explosive eruption, when most of the debris has
settled back to the ground. D long after a shield
volcano has moved from a hot spot
CRCT Preparation
Chapter 9
Use the table to answer question 7.
7. According to the data collected above, which
type of magma is least likely to cause an
explosive eruption? A felsic magma C mafic B
intermediate magma D ultramafic
CRCT Preparation
Chapter 9
8. One of the active volcanoes on the island of
Hawaii is named Kilauea. If Kilauea is a shield
volcano, which of the following is a valid
conclusion? A Kilauea formed from repeated
eruptions of low viscosity lava that have spread
over a wide area. B Kilauea formed from repeated
moderately explosive eruptions of pyroclastic
material. C Kilauea is primarily made up of
alternating layers of lava and pyroclastic
material. D Kilauea has formed a cinder cone
through repeated eruptions of high viscosity lava.
CRCT Preparation
Chapter 9
9. A large volcanic eruption covers nearby
farmland in several meters of ash. Which is a
true statement about the ash in the immediate
future? A The ash will be an effective plant
fertilizer and will result in record crop
yields. B The ash will smother the crops,
possibly leading to food shortages in the
immediate area. C The ash will be a nuisance, but
it can easily be removed from the area. D The ash
may cause thunderstorms.
CRCT Preparation
Chapter 9
10. Georgia has no volcanoes. Yet, Georgias
climate can still be affected by volcanoes. How?
CRCT Preparation
Chapter 9
11. How does magma form at a convergent boundary?
CRCT Preparation
Chapter 10
12. Water chemically breaks down rock because A
water expands when it freezes. B acids in the
water react with chemicals in the rock. C
materials dissolved in the water are deposited. D
water is not affected by wind.
CRCT Preparation
Chapter 10
13. The component of soil that is made up of
organic material is called A abrasion. B humus. C
bedrock. D leaching.
CRCT Preparation
Chapter 10
14. Which of the following areas would experience
the most weathering? A an area with high winds,
significant rain, hot summers, and freezing
winters B an area with heavy rains, constant
temperatures, and gentle winds C an area with
constant heat, minimal rain, and high winds D all
areas are subject to the same amounts of
CRCT Preparation
Chapter 10
15. The dissolving of rock by acids that occur
naturally in water A is known as acid
precipitation. B is known as oxidation. C is
known as chemical weathering. D causes most of
the mechanical weathering of rocks.
CRCT Preparation
Chapter 10
16. Which of the following statements describes
how a rock changes after it is in a riverbed for
a long time? A The rock rapidly breaks into
smaller pieces. B Chunks of the rock break off,
and the rock becomes rougher. C The edges of the
rock are worn away, so its surface becomes
smoother. D The rock absorbs water from the
riverbed and becomes softer.
CRCT Preparation
Chapter 10
Use the picture to answer question 17.
17. The picture shows the process of mechanical
weathering that can cause cracks in rocks in
Georgias northern mountains to widen. What is
this process called ? A abrasion B dissolution C
ice wedging D oxidation
CRCT Preparation
Chapter 10
18. Why does air chemically weather rock? A The
air molecules are abrasive. B Air fills cracks in
the rock and later expands, causing the cracks to
enlarge. C The oxygen in the air combines with
elements in the rock in a process called
oxidation. D The rock wears away after wind blows
sand against the rock.
CRCT Preparation
Chapter 10
19. Which of the following is an everyday example
of a chemical phenomenon? A Fast moving river
water rushes over rocks. B Organic acids produced
by lichens break down rock. C Rocks tumble down a
mountain during a rockslide. D Ice forms in a
crack in a rock and makes the crack larger.
CRCT Preparation
Chapter 10
20. Which human activities can help prevent soil
erosion? A planting cover crops and employing
contour plowing methods B strip mining and
deforestation C building cities and highways D
growing crops and burning fossil fuels
CRCT Preparation
Chapter 10
21. Naomi made the pie graph during a laboratory
experiment in which she analyzed the composition
of loam found in Georgia. Based on this chart,
which of the following is a valid conclusion? A
Approximately 95 of the material that makes up
loam is useless to plants. B Decayed organic
matter is the least abundant component of loam. C
Only about 9 of loams composition is useful to
plants. D Only about 16 of loams composition is
useful to plants.
CRCT Preparation
Chapter 10
22. The soil of the Southern Piedmont areas of
Georgia is thin and low in nutrients. Much of
this terrain was cleared at one time for lumber,
fuel, and agricultural land. This led to
negative environmental impacts. Why might
farmers move from one plot of this land to
another, and how might this movement increase the
negative environmental impact?
CRCT Preparation
Chapter 10
23. Why is the soil of tropical rain forests thin
and nutrient-poor?
CRCT Preparation
Chapter 11
24. In the water cycle, the suns energy causes A
evaporation. B condensation. C precipitation. D
CRCT Preparation
Chapter 11
25. Which one of the following landforms results
from river and stream erosion? A mountains B
glaciers C river channels D aquifers