Year 8 humanities(landslides) Flashcards
(29 cards)
How does rainfall increase landslide risk?
Lubricates the top layer of soil
Reduces the friction
Increased landslide risk
Water makes soil heavier
Erosion
Increased speed of water down slope
How do steep slopes increases landslide risk?
The steeper the slope, the stronger the gravitational pull
Increased landslide risk
Increase speed of movement down the slope
How does deforestation increases landslide risk?
Trees have roots
Roots hold soil together
Deforestation=get rid of trees
No trees=no roots
No roots=less soil stability
No roots=erosion
Erosion=decreased slope stability=increased landslide risk
How does hill cutting increase landslide risk?
Decrease slope stability
Easier for gravity to overcome frictional forces.
Landslides occur when _________overcomes the ________ ________ holding layers of dirt and rock togeather on a slope.
Landslides occur when gravity overcomes the frictional forces holding layers of dirt and rock togeather on a slope.
Mountain
Steep-sided, long peak rising over 600 meters above the surrounding ground
Cirque
Bowl shaped hollow at the head of a valley or on a mountainside
Glacier
Large frozen river of ice that slowly moves down a valley in response to gravity
Mountain range
Chain of connected mountains
Ridge
Long, narrow elevation of land
Volcano
Opening in the earth’s crust where molten rock,
How are Fold mountains created?
Fold mountains are created by upward pressure when two tectonic plates collide
How are Fault-Block mountains formed?
Fault-Block mountains are created when cracks in the Earth’s crust force blocks of land upwards
How many ways are Volcanic mountains formed?
Volcanic mountains forms in two ways.
What are the ways Volcanic mountains are formed?
The first is through the process of subduction, where plates collide and the denser plate is forced downwards into the mantle. The second is in the hot spots, which are areas far from the plate where the mantle is particularly hot.
How do humans use mountains
Social, Economic, Spiritual, Environmental, Aesthetic, Cultural
How do humans use mountains socially
Residential…
How do humans use mountains economically
Mining Agriculture
Tourism
How do humans use mountains spiritually
worship
How do humans use mountains environmentally
leaving it alone, leave the land in its natural state.
How do humans use mountains aesthetically
walk around it in and use it for sightseeing. (Tourism)
How do humans use mountains culturally
worship?
Something historical happened
What would be your first sentence you would write for a question like this: Use the stimulus sheet to explain the human and natural processes contributing to the landslide risk in the(place)
There are multiple human and natural processes contributing to the landslide risk in the (place)
Contour lines(not art)
- Show elevation above sea level
- Are continuous and always form an enclosed shape, never overlap
- Closer contours means steeper
The closer contour lines are togeather, the steeper it is. The further apart contour lines are, the gentler the slope.
Use gentle and steep slope.
