| SUMMATIVE TEST NO. 1 Read the following question carefully. Write your answer on the space provided before each number.
___1. Which of the following tends to cause physical or mechanical weathering?
A. Animal that burrows in the ground.
B. Root of plants growing into the cracks in the rocks.
C. Water that seeps into the pores and cracks of rocks.
D. All of these
___2. Which of the following occurs when acidic water caused the rocks to break producing clay and soluble salts?
A. Carbonation
B. Oxidation
C. Hydrolysis
D. Erosion
___3. The following human activities are caused of physical weathering, EXCEPT.
A. Quarrying of rocks
B. Mining ores
C. Building roads and tunnels
D. Boating and fishing
___4. How does temperature cause the weathering of rocks?
A. Rocks are heated and cooled continuously.
B. Rocks are cooled tremendously all the time.
C. Rocks are heated greatly all the time.
D. Rocks are at different temperature.
___5. Plant serves as agents of weathering. Which of the following statements support this idea?
A. Falling of leaves cause rocks to break.
B. Decaying trunks of plants cause the rocks to break
. C. Root of plants that grow in rocks and cause them to break.
D. Branches of plants cause the rocks to break when blown by the winds.
50 pts po sa maayos na sagot
___1. Which of the following tends to cause physical or mechanical weathering?
A. Animal that burrows in the ground.
B. Root of plants growing into the cracks in the rocks.
C. Water that seeps into the pores and cracks of rocks.
D. All of these
___2. Which of the following occurs when acidic water caused the rocks to break producing clay and soluble salts?
A. Carbonation
B. Oxidation
C. Hydrolysis
D. Erosion
___3. The following human activities are caused of physical weathering, EXCEPT.
A. Quarrying of rocks
B. Mining ores
C. Building roads and tunnels
D. Boating and fishing
___4. How does temperature cause the weathering of rocks?
A. Rocks are heated and cooled continuously.
B. Rocks are cooled tremendously all the time.
C. Rocks are heated greatly all the time.
D. Rocks are at different temperature.
___5. Plant serves as agents of weathering. Which of the following statements support this idea?
A. Falling of leaves cause rocks to break.
B. Decaying trunks of plants cause the rocks to break
. C. Root of plants that grow in rocks and cause them to break.
D. Branches of plants cause the rocks to break when blown by the winds.
50 pts po sa maayos na sagot
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Answer:
1. D. All of these
All the options mentioned (animals burrowing, plant roots growing into cracks, and water seeping into pores and cracks) can cause physical or mechanical weathering by exerting pressure, expanding cracks, or wearing away rock surfaces.
2. A. Carbonation
Carbonation occurs when acidic water reacts with certain minerals in rocks, such as limestone or marble, causing them to break down and form clay and soluble salts.
3. D. Boating and fishing
Boating and fishing are not typically associated with physical weathering. Quarrying of rocks, mining ores, and building roads and tunnels involve human activities that can cause physical weathering by breaking or dislodging rocks.
4. A. Rocks are heated and cooled continuously
Temperature changes can cause rocks to expand when heated and contract when cooled, leading to the expansion and contraction of rock materials. This continuous heating and cooling can contribute to the weathering of rocks.
5. C. Roots of plants that grow in rocks and cause them to break
Plant roots that grow in rocks can exert pressure and force their way into cracks, causing them to widen and eventually break the rocks. The falling of leaves, decaying trunks, and branches blown by the wind do not directly cause weathering of rocks.
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Answer:
1. D. All of these tend to cause physical or mechanical weathering. Animal burrows create cracks and holes in the ground, roots of plants growing into the cracks in the rocks can widen them, and water that seeps into the pores and cracks of rocks can freeze and expand, causing the rocks to break apart.
2. A. Carbonation occurs when acidic water reacts with rocks that contain calcium carbonate, such as limestone, causing them to break down and produce clay and soluble salts.
3. D. Boating and fishing are not likely to cause physical weathering of rocks, while quarrying of rocks, mining ores, and building roads and tunnels all involve the breaking, grinding, or blasting of rocks.
4. A. Rocks are heated and cooled continuously as a result of changes in temperature, causing them to expand and contract. Over time, this process can cause rocks to break apart due to the repeated stress.
5. C. Roots of plants that grow in rocks can cause them to break apart as the roots expand and push against the rocks. Falling leaves and decaying trunks of plants do not directly cause physical weathering, although they can contribute to chemical weathering by releasing acids and other compounds that break down rocks over time. Branches of plants may break off and fall onto rocks, but they do not directly cause the rocks to break apart.