Why Is It Hard to Find Rocks from Earth's Early

question 32

Multiple Choice

Why is it hard to find rocks from Earth's early history?

• A) because of heavy bombardments that melted most of Earth's crust up until 3.8 billion years ago
• B) because of plate tectonics that destroyed rocks
• C) because rocks are ephemeral structures
• D) a and b
• E) a, b, and c

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Definitions:

Neuron

A nerve cell that is the basic building block of the nervous system, responsible for receiving and transmitting information through electrical and chemical signals.

Action Potential

A rapid rise and subsequent fall in voltage or electrical charge across a cell's membrane, allowing neurons to transmit signals over distances.

Electrical Charge

A fundamental property of particles that causes them to experience a force when placed in an electromagnetic field.

Neuron

A nerve cell that is the basic building block of the nervous system, responsible for receiving, processing, and transmitting information through electrical and chemical signals.