Tsunamis

Which could not cause a Tsunami

• earthquake

• underwater volcanoes

• landslides

• hurricane

What is a Tsunami?

• A wave in the ocean usually caused by earthquakes

• A wave in the ocean usually caused by tides

• A wave in the ocean usually caused by hurricanes

• A wave in the ocean seen only in Japan

Why don't earthquakes on Transform Faults trigger tsunamis?

• The earthquakes aren't strong enough

• The earthquakes aren't in the ocean

• The earthquakes don't vertically displace the water in the ocean

• The earthquakes don't move fast enough

All of the following are factors that affect tsunami intensity except

• Magnitude of earthquake causing tsunami

• Distance from earthquake to land

• Shape of coast line

• Time of day when earthquake occurs

Tags

NGSS.MS-ESS3-2

Why don't boats in the open ocean notice a Tsunami approaching?

• Tsunamis are too small in amplitude in the open ocean and the distance between crests is too large for boats to notice its passing.

• Boats will usually mistake the large waves for tidal waves and not recognize them as Tsunami.

• Because Tsunamis are produced by earthquakes, the boats are probably still recovering from the initial tremors to notice a change in the waves.

• Tsunami waves don't break and therefore won't be noticed by boats.

What is the difference between a distant and local tsunami?

• distant tsunamis aren't dangerous

• distant tsunamis move farther from their source before they hit land

• distant tsunamis are larger than local tsunamis

• distant tsunamis are triggered in remote parts of the ocean

• distant tsunamis hit after the local tsunamis

Which of the following regions has the least risk from Tsunamis?

• Japan

• Northeastern Coast of the Indian Ocean

• Hawaii

• Atlantic Coast of United States

• Pacific Northwest Coast of United States

How are fires started after a tsunami?

• Fires are started after gas lines break and catch on fire

• Fires are started by molten lava that erupts from the subduction zone

• Fire is brought along with the tsunami as it move

• Fires are not associated with tsunamis because it is too wet

Does human activity affect the magnitude of tsunamis?

• Yes. Human structures on the shoreline increase the wave amplitude.

• Yes. Human use of water increases the wave amplitude.

• Yes. Global warming is causing an increase in the frequency and magnitude of tsunamis.

• No. Human activity does not increase or decrease the wave amplitude.

Which of the following are ways to minimize the hazard from Tsunamis?

• Greater emphasis on detection and warning systems

• Stricter building codes for structures on vulnerable coastlines

• Increased planting of native vegetation to break waves

• Educate people about what to do during a Tsunami

• All of the above are ways to minimize the hazard