Name 2 differences between shield and composite volcanos
.
What connection do some scientists make between climate change and drought?
They predict that warmer worldwide temperatures will mean decreased rainfall in some parts of the world, leading to more drought events
Name 2 geological hazards
earthquakes, volcanic eruptions
What's the epicentre of an earthquake?
the point on the Earth's surface directly above the focus
Name and explain 2 human causes of flooding.
Deforestation, urbanisation, Agriculture, climate change
What does a storm hydrograph show?
It shows how quickly a river responds to a rainfall event.
Name the 3 kinds of boundaries between tectonic plates
Conservative, constructive, destructive
Name and explain 2 physical causes of flooding.
Weather, previous weather, soil and rock type, relief, Earthquakes, volcanoes and tropical cyclones.
Name 2 typical weather conditions when a tropical cyclone approaches.
Cloudy, increasing wind speed, air pressure falls, heavy rainfalls
What are tectonic plates?
a piece of the lithosphere that moves slowly on the asthenosphere.
True or false? Cyclones always take girls' names
False!
Name 2 differences between oceanic and continental crust
.
How is a tropical cyclone formed?
.
What's a natural hazard?
a physical event that has the potential to cause loss of life or injury and damage property and infrastructure.
What's a volcano?
a hole or crack (fissure) through which magma erupts onto the surface
True or false? When a tropical cyclone passes over land or a cold ocean current it loses the source of energy and the speed increases.
False!
What's a drought?
When there is a lack of rain or less rain than normal over a long period of time.
What's flooding?
When the discharge of a river exceeds the capacity of the river's channel.
Name 2 climatic hazards
droughts, tropical cyclones, floods
Why do earthquakes take place?
They result from the build up and sudden release of tension, usually along a fault line.
True or false? Percolation is the vertical movement of water from the soil into underlying rock
True!
What's the focus of an earthquake?
the location under the Earth's surface where an earthquake originates
How can human activity influence the effect that drought has on a region?
Agriculture (irrigation, overcultivation, overgrazing), deforestation, dams
Name 2 ways of categorizing natural hazards.
Causes, magnitude, speed, duration, frequency
What's a tropical Cyclone?
Large areas of very low pressure with wind speeds of over 119 km h-1