Ateam led by evolutionary biologist hopi hoekstra set out to test the hypothesis that predators are an agent of natural selection on mouse color. they made 250 plasticine models of mice that were alike in every way except that half were painted white and half were painted brown. complete a paragraph about two advantages and one disadvantage of using model mice instead of real mice in this experiment.

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano