The farmer reads an advertisement for a plant food saying that it will make plants grow faster and taller. They decide to take a sample of 30 medium drinks to see if the average amount is significantly greater than 500 milliliters. Older rocks that are the same age and are located on the same continent point to the same location, but that location is not the current north magnetic pole. What should the independent variable be in an experiment testing this hypothesis? Magnetite crystals in fresh volcanic rocks point to the current magnetic north pole no matter what continent or where on the continent the rocks are located. There are certain factors to consider, and there is no easy answer. Larger rocks, however, either cannot be moved without heavy machinery or will break a normal household scale. Ask your mom, dad or other adult to act as your scientific assistant: This crayon rock cycle experiment will require their supervision and help. Name:_____ Hypothesis Practice Worksheet Date:_____ Period:_____ Hypothesis Writing Practice Forming a hypothesis is the second step of the scientific inquiry process. He called his hypothesis continental drift. Gaia Hypothesis has since been supported by a number of scientific experiments[20] and provided a number of useful predictions,[21] and hence is properly referred to as the Gaia theory. made from fragments of other rocks. Smaller rocks can be placed on a scale to find their weight easily. Typically, there are three factors, or variables, one … Amanda_Bewley6. The reptile Mesosaurus could only swim in fresh water. He suggested that Pangaea broke up long ago and that the continents then moved to their current positions. Agents that break down rocks include wind, rain, rivers, and rock … A testable hypothesis is a hypothesis that can be proved or disproved as a result of testing, data collection, or experience. How do I write a hypothesis? Today glaciers only form on land and nearer the poles. 13187 0 obj <>/Filter/FlateDecode/ID[<53864575E6E2D0D49AE7900E9A1AAD9E>]/Index[13181 17]/Info 13180 0 R/Length 52/Prev 390313/Root 13182 0 R/Size 13198/Type/XRef/W[1 2 1]>>stream Besides the way the continents fit together, Wegener and his supporters collected a great deal of evidence for the continental drift hypothesis. its rock model. The best-selling plants are the ones with the most blossoms. (b) Verify that the sample size is sufficiently large for the z statistic to be appropriate. Wegener said that continents move around on Earth’s surface and that they were once joined together as a single supercontinent. And to answer their question, no there is not sufficient evidence to conclude that there is a difference. Rocks are formed at every stage of the rock cycle. Wegener’s idea was nearly forgotten until technological advances presented even more evidence that the continents moved and gave scientists the tools to develop a mechanism for Wegener’s drifting continents. I have tried so many times to get these answers right but I can't. 13181 0 obj <> endobj 1. Small pebbles will float momentarily and then sink. Around 250 million years ago, the north poles were also different for the two continents.The scientists looked again at the three possible explanations. The following table shows general guidelines for choosing a statistical analysis. Triangular stones tend to skip best. Iron c. Chlorine study of the Earth Scientific 5. The core c. Radioactive decay d. The Sun 4. The stone should be mostly flat, about the size of the palm of your hand and about the weight of a tennis ball. The easiest link is between the eastern Americas and western Africa and Europe, but the rest can fit together too. First, you must pick the perfect rock to skip. Biochemical sedimentary rocks form … You would then have to experiment and collect more data to find out if the hypothesis is correct or needs to be modified. As air on the surface of Earth warms, the density of the air Cynognathus and Lystrosaurus were land reptiles and were unable to swim.Grooves and rock deposits left by ancient glaciers are found today on different continents very close to the equator. Wegener concluded that they formed as a single mountain range that was separated as the continents drifted.Ancient fossils of the same species of extinct plants and animals are found in rocks of the same age but are on continents that are now widely separated. Geologists noted that for rocks of the same age but on different continents, the little magnets pointed to different magnetic north poles. Wegener said the rocks had formed side-by-side and that the land had since moved apart.Mountain ranges with the same rock types, structures, and ages are now on opposite sides of the Atlantic Ocean. However, this would be considered a poorly Three rocks which have a “d” of 10.3 inches weigh approximately 240 pounds; 20 rocks which have a “d” of 7.3 inches weigh approximately 550 pounds, etc., to less than 0.2 x D50. You've made the hypothesis that the higher the density of a rock, the higher the temperature at which will melt, because a denser rock contains more material. nicole3145. Question: Which size of rock is best for skipping! 0 The three types are: Igneous rocks form from cooling magma or lava. Since there is only one north pole today, the only reasonable explanation is that the north magnetic pole has remained fixed but that the continents have moved.To test this, geologists fitted the continents together as Wegener had done and behold, it worked. %PDF-1.6 %���� Learn vocabulary, terms, and more with flashcards, games, and other study tools. Remember, you are only being graded on if you wrote your hypothesis correctly (the four guidelines above) not if your answer to the questions is correct. In science, however, a theory is an explanation that generally is accepted to be true. 1. ... ignore the data because they do not support their hypothesis. (a) Complete the four steps of the hypothesis test by completing the table titled Hypothesis Test for Self-Test Problem 22-1. All of the rocks on earth are formed in one of three ways. Only testable hypotheses can be used to conceive and perform an experiment using the scientific method. It can't be too large or too small; a nice medium size rock that fits in the palm of your hand will do just fine. In fact, wider research proved the original hypothesis wrong, in the sense that it is not life alone but the whole Earth system that does the regulating. 2). Based on their observations and data they collect they should be able to develop a hypothesis and an experiment to test this hypothesis. A farmer grows and sells flowering plants. Each experiment is different, with varying degrees of certainty and expectation. answer choices . I don't understand this work and ive read the information several times. elenajohn4. Which statement would best dispute the claim that these rock formations are living? � � Older rock that are of different ages do not point to the same locations or to the current magnetic north pole.In other words, although the magnetite crystals were pointing to the magnetic north pole, the location of the pole seemed to wander. The farmer predicts that taller plants will have more blossoms and performs this experiment to test his hypothesis. E)all made of ice. A)a mixture of rock and ice, with the ice fraction increasing with distance from Jupiter. Gizmo Warm-up Rocks are classified by how they formed. Only one can be correct. The owner suspects that the machine may be dispensing too much in medium drinks. They named the phenomenon of the magnetic pole that seemed to move but actually did not apparent polar wander. This evidence for continental drift gave geologists renewed interest in understanding how continents could move about on the planet’s surface. He suggested that the organisms would not have been able to travel across the oceans. Frozen Rock. a`^\����X�7�� je �_b SCI - Ch 6 Rocks Study Guide - Earth Science 25 Terms. (c) Considering the results of the hypothesis test, decide which of the Type I or Type II errors is possible, 1). The machine is designed to dispense 530 milliliters of liquid on the medium size setting. The continental drift hypothesis was developed in the early part of the 20th century, mostly by Alfred Wegener. Formation of a new rock often requires the destruction of an “old” rock. ? That’s the true size and shape of a continent and many can be pieced together like a puzzle. endstream endobj startxref A. the size of the rock B. the color of the rock C. the density of the rock 13197 0 obj <>stream Explain your answer.... YOU MIGHT ALSO LIKE... Earth Science Unit 3 Review 15 Terms. Better yet, use a map where the edges of the continents show the continental shelf. For example, the fossils of the seed fern Glossopteris were too heavy to be carried so far by wind. This activity is a lab inquiry-base lesson on the rock cycle. http://www.opengeography.org/physical-geography.html, https://commons.wikimedia.org/wiki/File:Snider-Pellegrini_Wegener_fossil_map.svg. Hypothesis: 3). Puzzling new evidence came in the 1950s from studies on the Earth’s magnetic history. But once you've got the size you want then you need to consider the appropriate shape. For example, 400-million-year-old magnetite in Europe pointed to a different north magnetic pole than the same-aged magnetite in North America. (4) transported sediment size 17. Wegener thought that the glaciers were centered over the southern land mass close to the South Pole and the continents moved to their present positions later on.Coral reefs and coal-forming swamps are found in tropical and subtropical environments, but ancient coal seams and coral reefs are found in locations where it is much too cold today. Magma and lava are rocks that are so hot they move like a liquid. Students will look at the parts of the rock cycle by examining three rocks. C)a mixture of rock and ice, with the rock fraction increasing with distance from Jupiter. As you experiment with each rock or set of rocks, write down whether your rock floats or sinks, the time it takes to sink, and any other observations you may have about the rocks and the water. While Wegener was alive, scientists did not believe that the continents could move.Find a map of the continents and cut each one out. classified by size, color, or pattern. endstream endobj 13182 0 obj <>/Metadata 214 0 R/OpenAction[null/XYZ null null null]/Outlines 227 0 R/PageMode/UseNone/Pages 13174 0 R/PieceInfo<>>>/StructTreeRoot 244 0 R/Type/Catalog>> endobj 13183 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/StructParents 16/Type/Page>> endobj 13184 0 obj <>stream Igneous rocks form when magma or lava cools and hardens into a rock. D)hydrogen and helium gas. Wegener suggested that these creatures were alive in warm climate zones and that the fossils and coal later had drifted to new locations on the continents.Although Wegener’s evidence was sound, most geologists at the time rejected his hypothesis of continental drift. What characteristics do you think scientists use to classify rocks? was a swimming reptile but could only swim in fresh water. There are three possible explanations for this: 1) The continents remained fixed and the north magnetic pole moved. only being graded on if you wrote your hypothesis correctly (the four guidelines above) !not if your answer to the questions is correct.! In this case, it is best to measure the dimensions of the rock and calculate the weight using the rock's … A hypothesis would be that "minerals and rocks are formed by natural processes on Earth." Rocks are not composed of cells, while living organisms are. Explanation: On increasing the temperature the solubility of a solid in a liquid increases, as on increasing the temperature the kinetic energy of the molecules of the solvent increases which causes more space in the particles of the solvent making the solute particles to break more rapidly. To take a sample of 30 medium drinks to see if the average amount is significantly greater than milliliters! Test for Self-Test Problem 22-1 1950s from studies on the Earth scientific.. The alternative from cooling magma or lava mostly by Alfred Wegener link between. They were dead and fossilized cut each one out that can be proved disproved... Of rocks and how the rock experiments below show the characteristics of and!, without any assumption of its truth for Self-Test Problem 22-1 chemical precipitates called... How solid continents could plow through solid oceanic crust to develop a that! Travel across the oceans our p-value, 0.13, is greater than our alpha value, 0.05 our! Silicon a. 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