Earth Science Semester Test FA24

Front

What are supercontinents?

Back

Supercontinents are large landmasses that consist of multiple continental plates joined together. Examples include Rodinia and Pangaea.

Front

What was the Cretaceous-Paleogene Event?

Back

The Cretaceous-Paleogene Event was a mass extinction event that occurred approximately 66 million years ago, leading to the extinction of about 75% of Earth's species, including the dinosaurs.

Front

What is a protoplanetary disk?

Back

A protoplanetary disk is a rotating disk of dense gas and dust surrounding a young star, where particles collide and stick together to form planets.

Front

What type of galaxy is the Milky Way?

Back

The Milky Way is classified as a barred spiral galaxy, characterized by its spiral arms and a central bar-shaped structure.

Front

What causes island arcs and coastal volcanic mountain chains?

Back

Island arcs and coastal volcanic mountain chains form above subducting tectonic plates due to the process of partial melting, where the subducted plate melts and creates magma.

Front

Define tectonic plates.

Back

Tectonic plates are large, rigid pieces of the Earth's lithosphere that move and interact at their boundaries, causing geological activity such as earthquakes and volcanic eruptions.

Front

What is the theory of plate tectonics?

Back

The theory of plate tectonics explains the movement of Earth's plates and how their interactions shape the Earth's surface, leading to phenomena like earthquakes, mountain building, and ocean formation.

Front

What is a nebula?

Back

A nebula is a vast cloud of gas and dust in space, often the birthplace of stars and planets.

Front

What is the significance of the Big Bang theory?

Back

The Big Bang theory describes the origin of the universe, suggesting it began as a singularity and expanded rapidly, leading to the formation of galaxies, stars, and planets.

Front

What is subduction?

Back

Subduction is the process where one tectonic plate moves under another and sinks into the mantle, often leading to volcanic activity and the formation of mountain ranges.