How the Earth Was Made Worksheet

How The Earth Was Made Instructions: Answer the questions based on the information provided in the video. The questions are in order with the video. (10 pts) 1. The oldest rocks that we have discovered on Earth are called (0.25 pt.) a. Rudiment rocks b. Meteorites c. turquoise rocks d. Methane’s 2. The solar system is currently considered to have been created about 4.5 billion years ago. (0.5 pt.) 3. During an experiment on the international space station, what caused the salt crystals to clump, and then stick together? (0.25) a. Static electricity c. static volume b. Gravitational pull d. supernovas 4. What is one theory on how early Earth was formed? (1 pt.) Mineral grains of rock formed together through orbit, sticking together by static electricity and gravitational pull. 5. How many years do scientists believe it took the Earth to grow to present size? (0.25 pt.) a. 15 million yrs. b. 25 million yrs. c. 40 million years d. 30 million years 6. The Earth is separated into different layers. Scientists believe the layers are the way they are because the Earth heated up, then melted and then the denser rocks 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 0) of space, therefore cooling the Earth core from the outside in, creating the crust. (1 pt.) 7. What did Ernest Rutheford use to more accurately age rock and parts of the Earth? (0.25 pt.) a. Carbon dating b. Elemental decay c. radioactive decay d. none of the options listed 8. How old was the meteorite that was discovered in the 1950’s by Patterson that upon impact, nearly vaporized? (0.25 pt.) a. 5.5 billion yrs. old c. 4.5 billion yrs. old b. 6.5 billion yrs. old d. 4.5 million yrs. old 9. What is one hypothesis on how the moon was formed? (1pt) One hypothesis on how the moon was formed is that a planet collided with earth creating the moon from debris 10. April 1972, what did scientists collect that helped them determine if the hypothesis about how the moon formed could be supported? (0.25 pt.) a. Boot dust c. crater meteors b. Moon rocks d. bacteria from the crust 11. What did the moon rocks contain much less of, then they were expecting? (0.25 pt.) a. Silver b. Mercury c. gold d. iron 12. Circle one: True or False. The material found in the moon rock contained the same material found in the upper crust of the Earth. (0.25 pt) 13. Does it appear that Earth survived a collision with another planet? Circle one: Yes or No (0.25 pt.) 14. In Hudson Bay, scientists found what kind of unusual rock? (0.25 pt) a. Amphibolite’s c. stalagtites b. Trilobites d. crust crunchies 15. Circle one: True or False. The amphibolites are 4.28 billion years old. (0.25 pt) 16. How far down under Earth’s crust that exists today did the amphibolite rock form? (0.25 pt.) a. 10 miles b. 12 miles c. 13 miles d. 12 kilometers 17. What does a crust 12 miles thick suggest about the Earth? (0.5 pt) There must have been continents 18. The chemical signature of the rock also showed that Earth had not only a crust, but what other feature? (0.25 pt) a. Oceans b. Soft crust c. steep valleys d. Mountains taller than Everest 19. Banded iron formations, contain silica and magnetite only form under water, which means that water existed on Earth (0.25 pt) a. 5 billion years ago c. 2 billion years ago b. 4.28 billion years ago d. 3 billion years ago 20. Scientists have new evidence of how water appeared on Earth came from a which also contains crystals of table salt . This salt, contains drops of liquid water . The water can be seen moving around in the crystals. The salt is 4.5 billion years old, which means the water inside must be at least as old as the salt. (1 pt) 21. In northern Mexico, a flash was seen in the sky. It was caused by a meteorite that broke into fragments as it entered the atmosphere. What did scientists find in the meteorites that were unique? (0.25 pt.) a. DNA c. Proteins b. Carbohydrates d. Amino Acids 22. Could life exist without amino acids? (0.25 pt.) Circle one: Yes or No 23. Circle One: True or False. Scientists’ originally thought that amino acids had formed on the surface of Earth. (0.25 pt.) 24. How old are the coral like structures and what are they called? (0.25 pt.) a. 3 billion yrs. old; stromatolites b. 2 billion yrs. old; stromatolites c. 3 million yrs. old; gromites d. 5 billion yrs. old; stromatolites 25. The billions of microbes that make up the stromatolites are called? (0.25 pt.) a. Purple bacteria b. Eubacteria c. cyanobacteria d. algae 26. What do the cyanobacteria create? (0.25 pt.) a. Carbon dioxide b. Oxygen c. methane d. water