2nd 9 weeks review

Front

What is the principle of superposition in geology?

Back

The principle of superposition states that in an undeformed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What does the Hertzsprung-Russell diagram represent?

Back

The Hertzsprung-Russell diagram graphs stars' luminosity against their temperature, helping to classify stars and understand their evolution.

Front

What is a convergent boundary?

Back

A convergent boundary is where two tectonic plates move toward each other, often resulting in earthquakes and volcanic activity.

Front

What is a transform boundary?

Back

A transform boundary is where two tectonic plates slide past each other horizontally, which can cause earthquakes.

Front

What spectral class does our sun belong to?

Back

The sun belongs to the G spectral class, which indicates its temperature and color.

Front

What is the significance of rock layer order in geology?

Back

The order of rock layers helps geologists determine the relative ages of the rocks and the history of the Earth's surface.

Front

What is the definition of luminosity in astronomy?

Back

Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.

Front

What is the difference between a volcanic eruption and an earthquake?

Back

A volcanic eruption involves the expulsion of magma and gases from a volcano, while an earthquake is the shaking of the ground caused by the sudden release of energy in the Earth's crust.

Front

What are sedimentary rocks?

Back

Sedimentary rocks are formed from the accumulation and compaction of mineral and organic particles, often found in layers.

Front

What is the role of temperature in the Hertzsprung-Russell diagram?

Back

Temperature affects a star's color and luminosity, with hotter stars appearing blue and cooler stars appearing red.