Natural Hazards
What are 3 of the things that cause weathering?
wind, frost wedging (ice), water, tree roots, temperature
What shaped valley does a glacier create? (Hint: it's a letter in the alphabet)
U
True or False
We can prevent damage from a volcano by building big walls around them.
False - they would burn too
What is weathering?
The breaking down of rocks
What makes islands?
Volcanoes (volcanic erruptions)
What are 2 things that cause erosion?
wind, rain, moving water, ice
What are the 3 steps of the process, in order?
weathering, erosion, deposition
True or False
The best way to stay safe from a volcano or tsunami is to get as far away as possible.
True
What is erosion?
when the sediment (broken down rocks) moves or is washed away
What is a tsunami?
A giant wave
How long does weathering take to be noticeable?
Millions of years
Which stage of the process causes sand dunes to form?
deposition
How can we prevent damage from earthquakes?
Build stronger buildings and bridges, with specific materials
What is deposition?
After erosion when rock sediment settles in one place
What causes earthquakes, volcanoes, and mountains forming?
Moving tectonic plates (the Earth's crust moving)
What is the 3rd (and last) stage or weathering, when the sediment stops moving?
deposition
Where does everything eventually end up?
The ocean
What are 2 ways farmers can protect their topsoil from erosion?
Plant a wall of trees, plant crops during all seasons, plant grass over the soil
What is the name of the landform that is created when the land is pushed up?
Mountains or hills
What causes earthquakes?
Motion on fault lines (moving tectonic plates)
What part of the process are we showing when we put rocks in a bottle with water and shake it?
weathering or abrasion
Did we enjoy learning about weathering and natural hazards?
YES!
How do we protect people from natural hazards?
With predictive tools that can tell when they will happen
What is a glacier?
A slow moving river of ice