Show:
Minerals
Rocks
Rock Cycle
Weathering
Erosion
100
What are the characteristics of a mineral?
Minerals are inorganic solids with definite composition.
100
What criteria is used to classify rocks into different families?
Rocks are classified based on how they form (how they are made)
100
How does an igneous rock turn into a metamorphic rock
Igneous rock is exposed to heat and pressure
100
What is weathering?
The process of rocks breaking down over time
100
What is erosion?
Sediments get carried away
200
Why is color not enough to differentiate minerals?
Some minerals are the same color.
200
How do igneous rocks form?
by magma or lava that cools and hardens
200
How does sedimentary rock turn into igneous rock
Sedimentary rock is melted into magma, erupts, and cools off.
200
Is the following an example of chemical or mechanical weathering: Plant acids from mosses dissolve minerals in the rock.
Chemical
200
What are the major agents of erosion
wind, water
300
Name two tests that you could do to a mineral to differentiate it from another mineral?
streak test, hardness test, fracture/cleavage, density
300
How are metamorphic rocks formed
by heat and pressure
300
How does metamorphic rock turn into sedimentary rock?
It is broken down through weathering into sediments and the sediments get cemented together into sedimentary rock.
300
Is the following an example of chemical or mechanical weathering: plant roots force apart rocks and break them through pressure.
Mechanical Weathering
300
What are the negative impacts of erosion on humans?
Soil becomes unstable (landslides, mudslides, rockslides) Dust storms Less soil for farming = less crops
400
How are rocks different from minerals?
Rocks are made up of minerals.
400
Which type of rock sometimes has crystals or looks glassy
Igneous rock
400
What makes weathering happen faster?
hotter and wetter climates
400
Give one example of mechanical weathering
animal action, frost action, freezing/thawing, abrasion
400
What is the difference between weathering and erosion?
Weathering means breaking down the rock and erosion is when the broken down rock gets transported downhill or downstream by rain and wind.
500
If there are only 100 elements on the periodic table, how are there over 1000 minerals?
Minerals can be created by different combinations of elements.
500
What is the process that forms sedimentary rocks? (hint:4steps)
erosion -- deposition -- compaction -- cementation
500
How does sedimentary rock turn into metamorphic rock?
Sedimentary rock is exposed to heat and pressure
500
Give an example of chemical weathering
Hydrolysis, Oxidation, Carbonation, Plant Acids, Acid Rain
500
What can increase the rate of weathering and erosion?
Hot/Wet Climate