# Geochemistry Activities

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# Subject: Geochemistry

- 68 matches General/Other
- Elements 25 matches
- Phase Equilibria/Thermodynamics 19 matches
- Radioisotopes 21 matches
- Stable Isotopes 12 matches
- Aqueous Solutions 26 matches
- Acid/Base Reactions 13 matches
- Oxidation/Reduction Reactions 10 matches
- Organic and Biochemistry 7 matches
- Surface Chemistry 7 matches
- Reaction Kinetics/Rates 8 matches
- Geochemical Analysis 39 matches

# Geochemistry Applications

# Resource Type: Activities

Results 136 - 144 of **144 matches**

ConcepTest: Oldest Rock Dating #2 part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

The world's oldest known rock is approximately 4 billion (4,000 million) years old. What are the approximate relative percentages of parent (Uranium-235) and daughter (Lead-207) isotopes? The half-life of 235U ...

ConcepTest: Isotopic Dating with Parent to Daughter Ratios part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

The half-life of a radioactive isotope is 500 million years. Scientists testing a rock sample discover that the sample contains three times as many daughter isotopes as parent isotopes. What is the age of the rock? ...

ConcepTest: Oldest Rock Dating #1 part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

The world's oldest known rock is approximately 4 billion (4,000 million) years old. What are the approximate relative percentages of parent and daughter isotopes for Uranium-238 and Lead-206 (half-life = 4.5 ...

ConcepTest: Calculating Rock Age from Parent Radioactive Isotope part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

A radioactive (parent) isotope of element X is discovered in different amounts in four rocks (A, B, C, D) of the same composition. Which rock has the oldest calculated age? a. 15% of element X remains in Rock A b. ...

ConcepTest: Einsteinium Half-life part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

The isotope Einsteinium-253 has a half-life of 20 days. If you began an experiment with an 80-gram sample of Einsteinium-253, how much would remain after 60 days? a. 60 grams b. 40 grams c. 20 grams d. 10 grams

ConcepTest: Radioactive Decay part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

If radioactive decay began with 400,000 parent atoms, how many would be left after 3 half lives? a. 200,000 b. 100,000 c. 50,000 d. 25,000

ConcepTest: Isotope Mass and Atomic Number part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

The isotope of element X has 15 protons, 17 neutrons, and 15 electrons. The element has an atomic number of ____ and a mass number of ____. a. 15; 32 b. 17; 15 c. 17; 47 d. 15; 30

ConcepTest: Change in Porportion of Parent Isotopes Over Time part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

Which graph below best represents the change in the proportion of unstable (parent) radioactive isotopes with time? a. A b. B c. C d. D

ConcepTest: What percentage of parent isotopes remain? part of Starting Point-Teaching Entry Level Geoscience:ConcepTests:Examples

The half-life of a radioactive isotope is 1,000 million years. Scientists testing a rock sample discover that the ratio of parent and daughter isotopes indicates that the rock is 3,000 million years old. What ...