Q.19. PISA Based Question THE GRAND CANYON The Grand Canyon is located in a desert in the USA. It is a very large and deep canyon containing many layers of rock. Sometime in the past, movements in the Earth’s crust lifted these layers up. The Grand Canyon is now 1.6 km deep in parts. The Colorado River runs through the bottom of the canyon.See the picture below of the Grand Canyon taken from its south rim. Several different layers of rock can be seen in the walls of the canyon. Q.19 (1)The temperature in the Grand Canyon ranges from below 0o C to over 40o C. Although it is a desert area, cracks in the rocks sometimes contain water. How do these temperature changes and the water in rock cracks help to speed up the breakdown of rocks?
2 points
Captionless Image
Freezing water dissolves warm rocks.
Water cements rocks together.
Ice smoothes the surface of rocks.
Freezing water expands in the rock cracks.
Answers
Answer:
PISA Based Question THE GRAND CANYON The Grand Canyon is located in a desert in the USA. It is a very large and deep canyon containing many layers of rock. Sometime in the past, movements in the Earth’s crust lifted these layers up. The Grand Canyon is now 1.6 km deep in parts. The Colorado River runs through the bottom of the canyon.See the picture below of the Grand Canyon taken from its south rim. Several different layers of rock can be seen in the walls of the canyon. Q.19 (1)The temperature in the Grand Canyon ranges from below 0o C to over 40o C. Although it is a desert area, cracks in the rocks sometimes contain water. How do these temperature changes and the water in rock cracks help to speed up the breakdown of rocks?
2 points
Captionless Image
Freezing water dissolves warm rocks.
Water cements rocks together.
Ice smoothes the surface of rocks.
Freezing water expands in the rock cracks
Answer:
a) freezing water dissolves warm rocks