Earthquakes
Volcanoes
Landslides
Floods
Extras
100

What is the starting point of an earthquake called? 

epicenter 

100
Define viscosity 

a measurement of how much magma will flow 

100

Which of the following is NOT a warning sign of a landslide 

a. heavy rain 

b. total silence 

c. cracks in the pavement or ground 

d. objects on the slope start tilting 

100

Why is it important to know the risk factors and warning signs of natural disasters? 

So we can predict when and where they will happen and prepare for them 

100

What causes a volcano to erupt? 

Plate motion creates pressure under the surface 

200
Where is it most common for earthquakes to occur? 

Along plate boundaries 

200

What determines how explosive an eruption will be? 

silica in the magma 

200

Free 100 points 

Yay

200

What is usually the cause of flooding? 

HEavy and long lasting rain 

200

What direction do plates move at a normal fault 

away from each other 
300

What piece of data is needed to determine how far an city is from an epicenter? 

Time in between the p and s waves 

300

How does density of magma affect its movement? 

Less dense magma rises to the surface 

300

What is the cause of a landslide? 

Gravity 

300

True or false floods usually have many warning signs 

false 

300

what direction do the plates move at a strike-slip fault

past each other/ one forward one back

400
What are two differences between P waves and S waves? 

p waves are faster and move side to side, s waves are slower and move up and down 

400

what is the difference between magma and lava? 

lava is on the surface of the earth, magma is below the surface 

400

What areas in the US are highest risk for a landslide? 

Areas where earthquakes occur/ near mountains 

400

Name two things that make an area higher risk for a flood 

low elevation 

near bodies of water 

etc

400

How many cities are needed to determine the epicenter of an earthquake? 

3

500
Identify/ Describe two of the three fault types 

Normal- plates are moving away from each other and get stuck 

Reverse- plates are moving toward each other and get stuck 

Strike-slip- plates are moving past each other and get stuck 

500
Explain how the state of Hawaii was formed 

hot spot- a thin area in the crust/ active area in the mantle 

500

Why do trees/ plants prevent landslides? 

The plant's roots hold the solid  in place 
500

Why does construction/ pavement make flood risk increase? 

It cannot absorb water as quickly as the earth 

500

Lose 10 points

L

M
e
n
u