ConcepTest: Ocean Element Profiles - 1 part of Examples
Which element could have a depth profile in the ocean that looks like this? A. Oxygen, an element produced during photosynthesis B. Barium, an element required in trace amounts for micro-organisms C. Nitrogen, a ...

ConcepTest: Calculating Rock Age from Parent Radioactive Isotope part of 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: Isotope Mass and Atomic Number part of 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 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: Best Index Fossil part of Examples
Four outcrops of rock are examined in different locations of a state. The rock types and the fossils they contain are illustrated in the adjacent diagram. Which fossil would be the best choice to use as an index ...

ConcepTest: Radioactive Decay part of 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: Temperature and Depth of Rock Formation #4 part of Examples
The diagram below illustrates five potential combinations of temperature and depth that are characteristic of different rock types. Answer the question that follows using the diagram. Which letter is the best ...

ConcepTest: Relative Time Diagram #3 part of Examples
Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which unit is composed of granite and older than ...

ConcepTest: Relative Time Diagram #1 part of Examples
Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which is the oldest rock unit? a. A b. B c. C d. D ...

ConcepTest: Relative Time Diagram #2 part of Examples
Match the features in the relative time diagram below with the events described in the short sentences. Assume all rocks are sedimentary unless otherwise indicated. Which unit was formed before A but after E? a. C ...