Earth Science: Weathering and Composition

The video is a review session for Earth Science seniors, covering topics like mass wasting, the rock cycle, stream sorting, and weathering. It explains the triggers of mass wasting, the processes in the rock cycle, and the types of weathering. The session also discusses solubility, recrystallization, and Earth's layers, providing examples and explanations to prepare students for exams.

What is one of the main triggers of mass wasting?

• Dense vegetation

• Low humidity

• High temperatures

• Over-steepened slopes

What does a metamorphic rock turn into when it is melted?

• Sedimentary rock

• Igneous rock

• Magma

• Lava

Which type of weathering involves a physical change?

• Mechanical weathering

• Thermal weathering

• Biological weathering

• Chemical weathering

What happens to water within a rock when it freezes?

• It evaporates

• It contracts

• It remains unchanged

• It expands

Which process involves the wearing down of rocks due to friction?

• Oxidation

• Solution weathering

• Abrasion

• Root wedging

What is the effect of water contracting within a rock?

• It has no effect on the rock

• It causes the rock to evaporate

• It causes the rock to expand

• It causes the rock to contract

What increases the rate of solubility of a solute in a solvent?

• Increasing the temperature

• Decreasing the temperature

• Reducing the solvent

• Adding more solute

Which layer of Earth is the densest?

• Outer core

• Inner core

• Mantle

• Continental crust

What is the primary composition of Earth's core?

• Magnesium and aluminum

• Carbon and hydrogen

• Iron and nickel

• Silicon and oxygen

Which layer of Earth is responsible for generating the magnetic field?

• Atmosphere

• Core

• Crust

• Mantle