The high temperature of Earth's interior is mainly due to
A) great internal pressure.
B) friction, as plates move past one another.
C) the Earth's natural heat.
D) radioactive processes.
Correct Answer:
Verified
Q11: Rays with the shortest wavelengths have the
A)highest
Q12: Which will NOT bend when moving in
Q13: A sample of highly-radioactive material is somewhat
A)warmer
Q14: Which radiation has no association with electric
Q15: Which is heated in its interior by
Q17: X-rays may be correctly regarded as
A)high frequency
Q18: X-rays are emitted by way of
A)ionizing radiation.
B)transitions
Q19: X-rays are similar to
A)alpha rays.
B)beta rays.
C)gamma rays.
D)all
Q20: The sources of X-rays are
A)electron clouds.
B)the atomic
Q21: Cosmic rays originate in the
A)Earth's interior.
B)Earth's upper
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