National Geographic: Natural Hazards                                Name__________________


Avalanches 101

  1. What causes avalanches?

  1. What is the effect of slope?

  1. How fast do they go?

  1. List some ways to prevent avalanches.

Volcanoes 101

  1. About 1500 volcanoes around the world are ___________________.

  1. Most are found in a band called the ______________________________.

  1. Most volcanoes are a result of moving _________________ and friction created when they run into each other that causes the plates to ___________________.

  1. Pompeii was a ____________________ volcano that had a thick/thin (circle one) lava that got stuck and caused the volcano to ___________________.

  1. Hawaii is on a hot ________________. The volcanoes have thick/thin (circle one) lava and are shield volcanoes, which means they probably won’t _________________.

  1. List the benefits of volcanoes.

Inside a Volcano

  1. What saved our planet when the world was covered by snow and ice and the average world temperature was minus fifty degrees Celsius?

  1. Eventually Earth’s climate _______________________.

Tsunami 101

  1. Tsunamis are caused by _________________________ rising from colliding plates.

  1. In the middle of the ocean, tsunamis move very ____________________. When they near shore, the shallower water causes them to __________________ and ________________, which is what causes damage on land.

  1. Unlike regular waves, a tsunami wave doesn’t _______________ and break. Instead, it moves ___________________ as much as a mile. It causes more damage, though, when it ____________________, dragging items with it.

  1. Tsunamis have ___________________ waves, anywhere from 15 to 60 minutes apart.

Earthquake and Tsunami, Japan 2011

  1. Identify 3 ways that tsunamis are dangerous or cause fatalities.

Hurricanes in Action

  1. Your thoughts?

Tornado on the Turnpike

  1. As quickly as it arrives, it _______________________.

How Does A Tornado Form?

  1. Explain what causes tornadoes to form.

  1. What place has the most tornadoes in the world?

Inside a Tornado

  1. How do scientists get inside a tornado?

  1. What did scientists discover from the probe?

Tornadoes, Lightning in Rare Video

  1. What do scientists hope to discover in studying hail?

  1. Why do you think you are safer in a car during a lightning storm?

  1. Why study lightning?

Earthquake Destruction

  1. Your thoughts?

Earthquake 101: Circle One

  1. True/False   When a stuck fault gives, the released energy passes through the earth in seismic waves.
  2. True/False   Scientists use an instrument called a heliograph to measure seismic waves.
  3. True/False    On average, about 5, 000 people die each year as a result of earthquakes.
  4. True/False    In 1964 a chasm in the ocean floor opened up and swallowed all the water in Valdez harbor.

Earthquakes: The Richter Scale

  1. When the ground moves 10 times as much, there is ______________ times the energy.
  2. True/False   Each level on the Richter Scale is 10 times as much as the one before it.

Storm Surge

  1. Your thoughts?

Flood News Report

  1. What is this story about? Do we know what caused it?

Doomsday Asteroid

  1. List the ideas for stopping an asteroid to keep it from hitting Earth. Identify the problems with each.

Could We Stop an Asteroid

  1. What difference does an asteroid’s size make if it hits Earth?

  1. Why is hard to find asteroids coming toward us? So, how do we find them?

  1. How do we make it miss? What methods does Bill Nye suggest to change its speed?