Understanding Earth's Natural Hazards

What is the main cause of tornadoes?

• Heavy snowfall

• Thunderstorms

• Earthquakes

• Volcanic eruptions

Which instrument is used to measure the magnitude of earthquakes?

• Thermometer

• Barometer

• Seismograph

• Anemometer

What is the primary cause of hurricanes?

• Cold ocean currents

• Warm ocean water

• High altitude winds

• Tectonic plate movement

Which of the following is a major effect of volcanic eruptions on the environment?

• Increased rainfall

• Formation of new land

• Decreased air pressure

• Lower sea levels

How are tornadoes measured?

• Richter scale

• Fujita scale

• Saffir-Simpson scale

• Beaufort scale

What natural hazard is most likely to cause a tsunami?

• Tornado

• Earthquake

• Hurricane

• Volcano

Which of the following is a common effect of hurricanes on the environment?

• Increased volcanic activity

• Flooding

• Earthquakes

• Snowstorms

What is the main factor that determines the strength of a volcanic eruption?

• The amount of water vapor

• The type of rock

• The amount of gas and magma

• The altitude of the volcano

Which scale is used to measure the intensity of hurricanes?

• Fujita scale

• Richter scale

• Saffir-Simpson scale

• Mercalli scale

What is a common sign that a tornado might be forming?

• Sudden drop in temperature

• Clear skies

• Rotating, funnel-shaped cloud

• Heavy snowfall