b.-Meteorites-) d. Methanes billion The solar system is currently considered to
ID: 152482 • Letter: B
Question
b.-Meteorites-) d. Methanes billion The solar system is currently considered to have been created about 12 years ago. (0.5 pt) 2. 3. Durin g an experiment on the international space station, what caused the salt crystals to clump, and then stick together? (0.25) a Static electricity b. Gravitational pull c. static volume d. supernovas 4. What is one theory on how early Earth was formed? (1 pt -Ccllicled 5. How many years do scientists believe it took the Earth to grow to present size? (0.25 pt) 15 million yrs 25 million yrs . 40 million years d.30 million years a. b. The Earth is separated into different layers. Scientists believe the layers are the way they are because the Earthup, then melted and then the sank, while lighter elements floated on top. The dense elements formed the of the Earth. At this point, the Earth was molten, and flowing. The outside of the Earth was exposed to the freezing temperatures (-450) of space, thereforethe Earth from the outside in, creating the crust. (1 pt) 6. rocks What did Ernest Rutheford use to more accurately age rock and parts of the Earth? (0.25 pt) 7. Carbon dating Elemental decay Gradioactiv d. none of the options listed a. b.Explanation / Answer
6) all answers are bold and underlined for question no.6 as specifically asked,
Earth heated up, then the denser rocks sank, while lighter elements floated on top
the dense elements formed the crust of the earth.
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