Craters and Impacts

Front

What is a meteor?

Back

A meteor is a rock or particle from space that enters a planet's atmosphere and produces a bright streak of light as it burns up.

Front

What is a meteorite?

Back

A meteorite is a space rock that survives its passage through the Earth's atmosphere and lands on the Earth's surface.

Front

What is a meteoroid?

Back

A meteoroid is a small rock or particle from space, smaller than an asteroid, that can become a meteor when it enters a planet's atmosphere.

Front

What is the K-T boundary?

Back

The K-T boundary is a geological layer that marks the end of the Cretaceous period and is associated with the mass extinction event caused by an asteroid impact.

Front

What evidence supports that craters are formed by impact events?

Back

Shocked quartz is a key piece of evidence that indicates craters were formed by impact events rather than volcanic activity.

Front

What is the role of impactor mass in crater formation?

Back

The mass of the impactor affects the size and depth of the crater formed upon impact.

Front

What is crater diameter?

Back

Crater diameter is the measurement of the width of a crater, which can vary based on the size and speed of the impacting object.

Front

What is the difference between a comet and an asteroid?

Back

Comets are icy bodies that release gas or dust, forming a tail when close to the sun, while asteroids are rocky bodies that do not have tails.

Front

What is shocked quartz?

Back

Shocked quartz is a form of quartz that has been altered by the intense pressure and heat of an impact event, providing evidence of such events.

Front

What is the significance of the Iridium layer in the K-T boundary?

Back

The Iridium layer is significant because it suggests a high-velocity impact, likely from an asteroid, which contributed to the mass extinction.