What percentage of the original parent isotope is daughter if 1 half life has elapsed?

  1. 50%
  2. 75%
  3. 87.5%
  4. 93.75%
  5. 100%


50%

Environmental & Atmospheric Sciences

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How many alpha particles are emitted in the series of radioactive decay events from a U-238 nucleus to a Pb-206 nucleus?

A. 8 B. 16 C. 32 D. 4

Environmental & Atmospheric Sciences

An earthquake measures 5.0 on the Richter scale. Therefore,

A. 10 times as much damage is done to buildings as there is in a magnitude 4.0 earthquake. B. the earthquake is 10 times deeper compared to a 6.0 earthquake. C. the ground shakes 10 times as much as it does during a magnitude 4.0 earthquake. D. 10 times as much energy is released as during a magnitude 4.0 earthquake.

Environmental & Atmospheric Sciences

Mountain glaciation leaves a series of V-shaped valleys

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences

How many water masses are common in tropical and temperate latitudes?

A) Three B) Four C) Five D) Six

Environmental & Atmospheric Sciences