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24 week assesment
Science
Question | Answer |
---|---|
What is the scientifically accepted age of the earth? | 4.6 billion yrs old |
What does the law of cross cutting relationships state? | Younger then the body of rock it cuts Through. |
What was carbon 14 dating used for? | Organic material. |
What is an index fossil? | can date a rock layer |
Why are there few fossils founds in Precambrian rocks? | because they were old and deformed. |
What sis the major cause of the Cretaceous extinction? | Asteroid strike. |
What mark the boundary between the Pleistocene and the Holocene epochs? | The end of the last ice age. |
What causes auroras? | Interaction with solar wind. |
What causes a geomagnetic storm? | Coronal mass ejections |
How does nuclear fusion create energy in the suns core? | Hydrogen nuclei and Helium |
What is the scientifically accepted age of the universe? | 14 Billion years old |
Explain the big bang theory? | All matter exploded and spread out |
What is the cosmic background radiation | Remident of the big bang |
What galaxy do we live in | Milky way |