Exploring the Impact of Asteroids on Earth

What was the initial theory about the formation of the Meteor Crater in Arizona?

• A giant volcanic explosion

• An asteroid impact

• A massive flood

• An earthquake

What key evidence did Eugene Shoemaker find that proved Meteor Crater was caused by an asteroid?

• A giant alien rock in the center

• Overturned rock beds at the crater rim

• Volcanic ash

• Fossilized plant material

What did scientists use to date the impact at Meteor Crater?

• Potassium-argon dating

• Uranium-lead dating

• Thermoluminescence dating

• Carbon dating

What was the estimated speed of the asteroid that created Meteor Crater?

• 100,000 miles per hour

• 10,000 miles per hour

• 25,000 miles per hour

• 50,000 miles per hour

What event caused the extinction of the mega mammals according to the video?

• A volcanic eruption

• An asteroid impact

• A massive earthquake

• A sudden ice age

How often do Tunguska-sized asteroid events occur according to recent research?

• Every 10,000 years

• Every 1000 years

• Every 100 years

• Every 500 years

What valuable metals were concentrated by the asteroid impact in Sudbury, Ontario?

• Gold and Silver

• Copper and Nickel

• Platinum and Palladium

• Iron and Cobalt

What type of meteorites are considered the rarest and most valuable?

• Stony-irons

• Chondrites

• Iron

• Stony

What are chondrules?

• Volcanic rocks

• Spherical inclusions in some meteorites

• Crystals formed by rapid cooling

• Fragments of comets

What did the Murchison meteorite contain that suggests a link to the origins of life?

• Water

• Amino acids

• Diamonds

• Platinum