34 Questions
What is the primary reason why the footprints left on the Moon by astronauts will remain unchanged?
The lack of atmosphere on the Moon
What is the process that breaks down solid rock into sediments?
Weathering
What is responsible for moving most sizes of sediments?
Water
What was the original height of the Appalachian Mountains?
As tall as the Himalayas
What is the result of the combined forces of weathering and erosion?
The transformation of tall mountains into hills and plains
What is the primary difference between chemical weathering and mechanical weathering?
The composition of the rock
What is the most common type of mineral found in the Earth's crust?
Silicate minerals
What is the chemical reaction between a chemical compound and water called?
Hydrolysis
What is the acid formed when carbon dioxide combines with water in raindrops?
Carbonic acid
What is the process by which iron rich minerals break down and form new compounds?
Oxidation
What is the primary effect of mechanical weathering on rocks?
Breaks rock into smaller pieces
What is the process of ice wedging?
Water seeps into cracks and freezes, expanding 9% in volume
What is the effect of abrasion on rocks?
Rocks become smooth and round
What is the relationship between mechanical weathering and chemical weathering?
Mechanical weathering increases the rate of chemical weathering
What is an example of human activity that contributes to mechanical weathering?
Building a road
What is the primary factor that determines the rate of weathering in a region?
Temperature and precipitation
What type of rock is most resistant to weathering?
Granite
What is the result of chemical weathering in a rock with different minerals?
The rock becomes pitted and rough
What is the relationship between temperature and chemical reactions in weathering?
Chemical reactions proceed more rapidly at higher temperatures
What is the result of intense chemical weathering in tropical climates?
Only the least soluble components, such as aluminum oxide, are left behind
The type of rock that resists weathering the most is limestone.
False
A region's climate has no influence on weathering.
False
Chemical weathering increases as precipitation decreases.
False
The rate of chemical reactions doubles for every 5°C increase in average temperature.
False
Warm, dry climates have the highest rate of weathering.
False
Biological weathering increases as the temperature decreases.
False
Aluminum oxide is formed through mechanical weathering.
False
Rock and mineral type have no effect on weathering.
False
Devil's Tower is a rock formed from sedimentary rocks.
False
Weathering is a process that only affects rocks.
False
Match the rock type with its weathering characteristic:
Igneous rocks = Weather slowly Limestone = Easily weathered Granite = Very resistant to weathering Sedimentary rocks = Dissolve in weak acids
Match the climate with its weathering rate:
Cold, dry climate = Lowest rate of weathering Warm, wet climate = Highest rate of weathering Hot, dry climate = Moderate rate of weathering Cool, wet climate = Medium rate of weathering
Match the factor with its effect on chemical weathering:
Temperature increase = Chemical reactions proceed more rapidly Precipitation increase = More water allows more chemical reactions Vegetation increase = Less chemical weathering Mineral increase = Faster chemical reactions
Match the location with its characteristic:
Tropical climates = Intense chemical weathering Devil's Tower = Resistant center of a volcano Mossy forest = Low rate of weathering Wet, warm areas = Most types of vegetation
Learn about weathering, the process that changes solid rock into sediments and how it affects the Earth's geologic features. Explore why the footprints on the Moon will remain forever due to the absence of weathering.
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