Test #2 Flashcards
Will a cement truck always have more momentum than a roller skater?
Yes
Why are the engines of a supertanker normally cut off 25 km from port?
They are cut off because the supertanker has enough momentum to reach shore.
A rabbit is chased by a pit bull. Both are moving at the same speed. Which has more momentum?
The pit bull has greater mass than the rabbit.
How are collisions and stopping affected when an object has a large momentum?
Collisions are more severe and stopping is more difficult.
What determines if these storms are called hurricanes, cyclones, or typhoons?
The geographical location of the storm determines how it is named.
The wind speed must reach what speed for a storm to be considered a hurricane?
74 mph
What is the deadliest weapon of a hurricane?
Water, resulting in severe flooding
Over which ocean did this destructive tsunami pass over?
The Indian Ocean
What event initiated the tsunami?
A massive earthquake on the ocean floor.
Before a tsunami hits the shore line what does it do that lures people to their death?
It causes the ocean to move away from the shore line, exposing the bottom of the ocean right off the coast for as far as a mile out to sea. People are curious and walk out onto the sea floor; meanwhile the tsunami wave is almost on top of them, but they do not know the danger that is approaching quickly.
How far reaching was the tsunami?
It eventually dissipated, but it affected the shore lines all over the earth with waves of various sizes.
The earthquake that caused this tsunami was so large, what did it do to the entire earth?
It shifted the earth causing it to move about 2.5 cm off its axis, pushing the earth off balance. It shortened the day by three millionths of a second.
What is one way the earth’s core formed?
While earth was forming over 4.5 billion years ago, its surface was made up of a hot magma ocean. As objects continued to hit the young planet, they melted, and their iron sank into the planet’s center, forming the planet’s core. Today, it consists of a solid-iron core, a liquid-iron outer core, a silicate mantle, and the plant’s crust, which contains the continents and oceans.
What generates the earth’s magnetic field?
A stirring motion in the electrically conductive liquid iron of the planet’s outer core acts as a dynamo that generates earth’s magnetic field. The magnetic field’s direction is indicated with black arrows.
How many years ago did an earthquake strike Japan that was stronger than “Japan’s Killer Quake 2011”?
Over 1,000 years ago
Which type of seismic waves are the most damaging and why?
S waves shake the ground from side to side, making them the most destructive seismic waves.
What is the final Richter scale number assigned to this killer earthquake? What does the earthquake cause that becomes the second disaster to be inflicted upon the east coast of Japan?
9.0; a tsunami
