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- 1. Multiple ChoiceAccording to scientists, both Earth and moon are...About 1.6 Billion Years OldAbout 4.6 Billion Years OldAbout 9.6 Billion Years OldAbout 14 Billion Years Old
- 2. Multiple Choice
The composition of todays atmosphere is mostly...
Hydrogen
Oxygen
Nitrogen
Helium
- 3. Multiple Choice
If you know the age of a rock, you know the relative age of the _________________ that was found inside.
sticky tar
fossil
amber
ice
- 4. Multiple ChoiceIn what way can scientists determine the ages of fossils?relative datingradioactive datinglaw of superpositionAll of the above
- 5. Multiple ChoiceIn layers of sedimentary rock, the _________ layer is usually at the bottom. Each higher layer is _________ than the layers below it.oldest, youngeryoungest, olderyoungest, youngeroldest, older
- 6. Multiple ChoiceScientists use unstable elements that decay, called _________ elements, to determine the actual age of a fossil.radioactivecationanionpetrified
- 7. Multiple ChoiceWhat is the half-life of a radioactive element?How old it is when it is middle agedThe time it takes for half of the atoms to decayThe time it takes for half of the atom to formHow old it is when the Earth is middle aged
- 8. Multiple ChoiceThe millions of fossils that scientists have collected are calledThe Geologic Time ScaleThe Origin of SpeciesThe Fossil RecordA really neat fossil collection
- 9. Multiple ChoiceWhat is a mass extinction?the extinction of all of Earth's species at ones timethe extinction of many types of organisms at the same timethe end of daysthe creation of many species at one time
- 10. Multiple ChoiceWhich of these describes a species that has become extinct?fewer members of the species are dying than being bornmore members of the species are dying than being bornvery few members of a species are aliveall members of a species have died
- 11. Multiple Choice
A species that no longer exists is said to be _______________.
extinct
endangered
threatened
born
- 12. Multiple Choice
Which rock layer in the diagram seems to be the oldest?FEBA - 13. Multiple ChoiceAccording to the law of superposition, the oldest fossils are foundAt the top of the rock layersNear the bottom of the rock layersIn the middle of the rock layersSomewhat near the surface
- 14. Multiple Choice
_____________ are the trace or remains of an organism that lived long ago.
climate
Fossils
Ice core
Trace fossil
Uniformitarianism
- 15. Multiple Choice
The science that study fossils is called?
zoology
paleontology
fossilogy
virology
- 16. Multiple Choice
About what percentage of life that has ever existed on the earth is extincy
10%
50%
75%
99%
- Answer choicesTagsAnswer choicesTags