A. Directions: Read the following question carefully.
Choose the letter of the correct answer.
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 of 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
c. Hydrolysis
b. Erosion
d. Oxidation
3. The following human activies are causes of physical
weathering, EXCEPT:
a Mining ores
c. Boating and fishing
b. Quarrying rocks d. Building roads and tunnels
4. How does temperature weather rocks?
a. Rocks are at different temperature.
b. Rocks are heated greatly all the time.
c. Rocks are cooled tremendously all the time.
d. Rocks are heated and cooled continuously.
5. Plant serves as agents of weathering. Which of the
following statements support this idea?
a. Falling of leaves causes rocks to break.
b. Decaying trunks of plants cause the rocks to break.
C. Roots of plants that grow in rocks cause them to
break.
d Branches of plants cause the rocks to break when
blown by the winds.