August 16, 2019 CER C laim E vidence R easoning
August 16, 2019 Oreos are the most popular cookie at my house. My family buys two types of cookies: oreos and Snickerdoodles. Each comes in a box of 20. Oreos run out twice as fast as Snickerdoodles. Because my family eats twice as many Oreos than Snickerdoodles, I know that Oreos are the most popular cookie. Can you identify the "Claim," the "evidence," and the "reasoning" parts?
August 16, 2019 What is a Claim?
August 16, 2019 "Oreos are the most popular cookie at my house"
August 16, 2019 Examples of Claims
August 16, 2019 What is evidence?
August 16, 2019 My family buys two types of cookies: oreos and Snickerdoodles. Each comes in a box of 20. Oreos run out twice as fast as Snickerdoodles.
August 16, 2019 Examples of Evidence • Results from experiments • Observations you make
August 16, 2019 What is reasoning?
August 16, 2019 Because my family eats twice as many Oreos than Snickerdoodles, I know that Oreos are the most popular cookie.
August 16, 2019 Example 2 Question: Is recess good for kids health?
August 16, 2019 CLAIMS: Are statements that you believe to be true and that answer a scientific question. Should be a one-sentence answer to the question you investigated. It answers, what can you conclude? TIPS: • Avoid using openings such as, “I think” or “I believe” • Example: If the question is “How does air temperature affect the rate a cricket chirps” then your claim could be: "As air temperature rises, crickets chirp faster."
August 16, 2019 EVIDENCE: Evidence is factual information or data from experiments that supports your claim. (e.g. observations, calculations, measurements) Evidence MUST be from a RELIABLE source/ text or experiment. Must have enough evidence to support your claim.
August 16, 2019 REASONING: Your explanation of how evidence supports the claim. Shows how and why the data counts as evidence to support the claim. Provides justification for why this evidence is important. Includes one or more scientific principles that are important to the claim and evidence.
August 16, 2019 Practice time! Write a CER for how you solve the puzzle on the following page!
August 16, 2019 Puzzle: 8 11 14 17 20 What number comes next? • Put your final answer in the "Claim" box • SHOW your work in the evidence box • WRITE your reasoning as to why your claim is correct based on the evidence...
August 16, 2019 What is your claim?
August 16, 2019 What is your EVIDENCE? (Did you actually write out the math and show the work?)
August 16, 2019 Evidence! 8+3=11 11+3=14 14+3=17 17+3=20 Each number in the series had the number 3 added to it
August 16, 2019 Reasoning: How does the evidence support your claim?
August 16, 2019 Reasoning possible answers: • Based on the evidence that each number in the series had the number 3 added to it, we must conclude that the next number in the series will be 23 as 20 plus 3 is equal to 23. • If all the numbers in the series had the number 3 added to them, then it would be logical to claim 23 as the next number since 20+3=23.
August 16, 2019 Last year you studied the difference between plant cells and animal cells. Look at the photo of the cell on your notes and read the CER that was written about the cell. As a class we will identify which parts of the paragraph are the claim, evidence and reasoning.
August 16, 2019 The diagram below shows an image of a cell taken from a Tasselled Wobbegong . Question: Is the Tasselled Wobbegong a plant or animal? Mitochondria Nucleus
August 16, 2019 Scientific Explanation (CER): The Tasselled Wobbegong is an animal. According to the image, the organism’s cell has a nucleus, cell membrane, and mitochondria, but it does not appear to have a cell wall or chloroplasts. Animal cells do not have cell walls because animals already have skeleton that gives them support, and animals do not have chloroplasts because animals get energy by eating food. Because the Tasselled Wobbegong’s cells are animal cells, the Tasselled Wobbegong must also be an animal. Directions: • Highlight/underline the claim in green • Highlight/underline the evidence in yellow • Highlight/underline the reasoning in red • Circle key scientific vocabulary (nucleus, cell membrane, mitochondria, cell wall, chloroplast)
August 16, 2019 Now that you can identify the parts of a CER, let's work together to write one! The table below shows the data that a scientist collected about a Helianthus californicus cell. Organelle Nucleus Mitochondria Cell Membrane Cell Wall Chloroplast Unable to Yes Unable to identify Yes identify Yes Question: Is the Helianthus californicus a plant or animal?
August 16, 2019 What is our claim? (Make sure we restate the question in the claim) The Helianthus californicus is a/an __________plant____________________.
August 16, 2019 Evidence ( Identify data that supports your claim) According to the data table, the organism has _a cell wall and chloroplasts.________ __________________________________ __________________________________ __________________________________
August 16, 2019 Reasoning (Connect the evidence to the claim using a scientific principle) Cell walls and chloroplasts are only found in plant cells, never in animal cells. __________________________________ __________________________________ Because the Helianthus californicus’s cells are ___plant______ cells, the Helianthus californicus must also be a ___plant______.
August 16, 2019 It is time for you to write your own CER! Complete CER #3: YOU DO This is HW if you do not have time to finish in class. These will be collected at the start of next class and graded for accuracy!
August 16, 2019
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