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it is the breaking down of rocks without a change in composition.
What is physical weathering?
A plant growing in a rock crack causes the rock to split. This is an example of this type of weathering.
Biological weathering
breaking down of rocks with change in composition
What is chemical weathering?
Soil
a mixture of minerals, organic matter, and rocks.
animals and plants
What are examples of agents of biological weathering?
frost, heat, water, and wind
What are some examples of agents of physical weathering?
Weathering always happens quickly. True or False? Explain!
False.
acid rain
What causes chemical weathering?
What is weathering?
It is a process that causes rocks on Earth’s surface to break down, reshape and change.
rabbits and rodents
What are examples of burrowing animals?
weathering of rocks from repeated freeze-thaw cycle of water
What is frost wedging?
How is soil formed?
The soil is formed by the weathering of rocks that mixed with minerals and organic matters.
corrosive and harmful
What are the characteristics of acid rain?
roots of trees
What part of the trees push open through cracks?
animals that burrow into a crack in a rock
What is the difference between weathering and erosion? Explain with ilustration!
Weathering is the process of the breaking down of rocks into smaller pieces by agents, when these smaller pieces of weathered rocks move from the site where weathering has occured.
the mixture or reaction of carbon dioxide and water
What substances produce acid rain?
It blows grains of sand against the rock.
How does the wind cause weathering of rocks?
Dark soil
Dark soil contains more nutrients, more humus and better in absorbs sunlight
crack becomes bigger, and eventually splits
What happens when burrowing animals burrow into the crack?
Imagine a new road is built through a forest. How could that lead to more erosion, and what can be done to reduce it?
Removing trees and soil cover exposes the land to wind and rain, increasing erosion. Planting grass or using barriers can reduce erosion
Why do stone statues kept inside museums retain their appearance and shape better than statues displayed outside the museums?
The stone statues outside the museum are exposed to weathering agents. For example, acid rain can dissolve some of the components of the stone.
You see a river that carries a lot of muddy water during heavy rain. What does that tell you about the erosion happening nearby, and what could be the long-term effect?
It shows active erosion upstream, and over time it could change the river’s shape
True or false. The mountain may change shape and become smaller over a long time of years. Explain!
True. Weathering breaks down the mountain rocks, erosion moves the pieces downhill or into rivers, and deposition drops the material elsewhere. Over time, the mountain slowly shrinks and changes shape.
How does air pollution lead to acid rain, and how does acid rain cause weathering on buildings made of limestone or marble?
Pollution from cars and factories releases gases like sulfur dioxide and nitrogen oxides. These mix with water in the atmosphere to form acid rain. When acid rain falls on limestone or marble, it reacts with the minerals in the stone and slowly breaks them down