Earth Science sem 1 wk 3

Front

What type of volcanoes are made of basaltic lava?

Back

Shield volcanoes are made of basaltic lava.

Front

What evidence did early mapmakers use to suggest that Earth's continents had moved?

Back

Early mapmakers thought Earth's continents had moved based on matching coastlines.

Front

What primarily determines earthquake intensity?

Back

Earthquake intensity primarily depends on the height of surface waves.

Front

Why was continental drift not widely accepted when first proposed?

Back

Continental drift was not widely accepted because Wegener couldn’t explain why or how the continents moved.

Front

True or False: The volcanoes in the Circum-Pacific Belt form as a result of magma rising into faults and fractures that form as tectonic plates diverge.

Back

False. The volcanoes in the Circum-Pacific Belt form as a result of subduction, not divergence.

Front

Define 'plate tectonics'.

Back

Plate tectonics is the scientific theory that describes the large-scale movements of Earth's lithosphere, which is divided into tectonic plates.

Front

What is a composite volcano?

Back

A composite volcano, also known as a stratovolcano, is characterized by a combination of explosive eruptions and lava flows, typically made of andesitic lava.

Front

What is the significance of fossil evidence in understanding continental drift?

Back

Fossil evidence supports the theory of continental drift by showing that similar species existed on continents that are now widely separated.

Front

What are P-waves and S-waves?

Back

P-waves (primary waves) are compressional waves that travel fastest through the Earth, while S-waves (secondary waves) are shear waves that travel slower and can only move through solids.

Front

What is the Ring of Fire?

Back

The Ring of Fire is a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur due to tectonic plate boundaries.