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10.5.1Practice:Evolution and ClassificationPractice Biology Points Possible:40 Name:Treylan SavageDate:12/1/2019 In this practice you will apply what you have learned in this unit. Please answer the questions below. Submit this to your teacher when you are done. Instructions: Read the passage below and answer questions 1 – 4. People often misinterpret the language used by scientists. Because of this, they sometimes draw the wrong conclusions about what scientific terms mean. Three terms that are often misinterpreted are scientific law, hypothesis, and theory. In everyday language, if something is said to be a "theory," it usually means that it is a guess or is unproved. But in scientific terms, a theory implies that something has been proven and is generally accepted as being true. 1. A scientific law is a statement of fact that describes an action or set of actions. Laws are accepted as fact because they are always observed to be true. Examples of scientific laws are Newton's laws of motion. These laws describe the motion of moving objects. a) Give an example of a scientific law you have studied or heard of. (Think about what happens when an apple falls from a tree.) (1 point) Big Bang Theory b) How do you know that this is a law in scientific terms? (1 point) Because it describes how the whole universe came to exists 2. A hypothesis is an educated guess based upon observation. It is an explanation of a single event based upon what is observed. A hypothesis has not been proved but can be supported by experimentation. a) Suppose that out of 10 trees planted in a yard, only five survived. What kind of hypothesis could you make about this observation or event? Remember that a hypothesis needs to have a certain format. (1 point) Next time another set of 10 trees are planted half them will die again. b) How could you test this hypothesis? What type of experiment could you perform? (1 point) Plant another set of 10 trees and see the outcome of all them over time. c) How would this hypothesis be different from a scientific law? (1 point)
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Because it is an educated guess not a proven theory. 3. In science, a theory is more like a scientific law than a hypothesis. A theory explains a set of observations or events. It must be verified multiple times by many different scientists. One scientist cannot create a theory on his or her own.
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