Which of the Following Characterizes the History of Impacts on Earth

question 49

Multiple Choice

Which of the following characterizes the history of impacts on Earth as deduced by impact history on other terrestrial planets?

• A) All major impacts occurred in the first 100 million years after the solar system formed.
• B) Impacts were more intense in the early history of Earth but have continued at about half the rate of bombardment since about 4.4 billion years ago.
• C) Impacts continued at a fairly constant rate throughout the 4.5 billion year history of the solar system.
• D) Impact rates were very high in the early history of Earth, but dropped off after about the first 1 billion years of Earth history to a nearly constant rate since that time.

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Definitions:

Emotion Expression

The process of conveying one's emotional state or feelings through verbal or non-verbal communication methods.

Relaxation Training

Techniques and practices aimed at achieving mental tranquility and physical ease to mitigate stress, including deep breathing, progressive muscle relaxation, and meditation.

Mindfulness Meditation

A practice of maintaining a nonjudgmental state of heightened or complete awareness of one’s thoughts, emotions, or experiences on a moment-to-moment basis.

Hypnosis

A trance-like state of focused attention and increased suggestibility, often used for therapeutic purposes.