Water trapped in the crevices of the rocks causes weathering because:
Water trapped in the crevices of the rocks causes weathering because:
The correct option is A Water expands upon freezing
Correct answer explanation-
(a) Water expands upon freezing
Weathering: The breaking down of rocks into smaller pieces over thousands of years due to a slow process called weathering.
Rainwater is trapped inside small cracks in rocks. In cold regions, this water freezes. Water expands upon freezing, so the cracks become wider. Next time more water is trapped and this widens the crack even more upon freezing. Eventually the rock breaks.
Incorrect answer explanation-
(b) Water expands on freezing, therefore the statement is wrong.
(c) Water will enter spaces or cracks present between rocks and break them into pieces, rather than dissolving them.
(d) Water enters the crevices and breaks them.
Rainwater is trapped inside small cracks in rocks. In cold regions, this water freezes. Water expands upon freezing, so the cracks become wider. Next time more water is trapped and this widens the crack even more upon freezing. Eventually, the rock breaks, hence option (a) is correct.
Water expands upon freezing
Correct answer explanation-
(a) Water expands upon freezing
Weathering: The breaking down of rocks into smaller pieces over thousands of years due to a slow process called weathering.
Rainwater is trapped inside small cracks in rocks. In cold regions, this water freezes. Water expands upon freezing, so the cracks become wider. Next time more water is trapped and this widens the crack even more upon freezing. Eventually the rock breaks.
Incorrect answer explanation-
(b) Water expands on freezing, therefore the statement is wrong.
(c) Water will enter spaces or cracks present between rocks and break them into pieces, rather than dissolving them.
(d) Water enters the crevices and breaks them.
Rainwater is trapped inside small cracks in rocks. In cold regions, this water freezes. Water expands upon freezing, so the cracks become wider. Next time more water is trapped and this widens the crack even more upon freezing. Eventually, the rock breaks, hence option (a) is correct.
