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Safety and Inquiry

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Safety and Inquiry

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  1. Take out verification letter, team letter, and textbook(if you have one). Bellwork # 2 –What is OIP?Copy and answer the following:1. What is an observation?2. What are the two types of observations?3. What is an inference? 4. What is a prediction?Homework:- Search for 3 SRP ideas.- Complete inference and observation practice and lab equipment identification(2 sheets)

  2. Safety and Inquiry

  3. Our Lab Safety Rules

  4. 1. Follow all instructions given by your instructor. • When uncertain about a procedure or directions, ask the instructor for clarification. • Do not attempt to use any equipment or materials until instructed. 2. Always wear safety goggles in lab. • 3. If contact lenses are worn during labs involving chemicals, non-vented, labeled goggles must be worn. • All other appropriate personal protective equipment for the lab must be worn.

  5. 4. A serious attitude is needed at all times during lab activities. • No horseplay will be tolerated. 5. NO open-toed shoes are to be worn in lab. Long pants or long skirts should be worn in lab. 6. NO gum, candy, drinks or other edible materials are allowed in the lab.

  6. acid water • 7. NO tasting or smelling is allowed unless instructed by the teacher. • When smelling, use a wafting technique 8. Hands should be kept away from the face and mouth. 9. NO mouth pipetting is allowed. 10. Always pour acid into water, NEVER WATER INTO ACID.

  7. 11. Broken glassware must be placed in a specified container. You must notify the teacher. • 12. Return all equipment and materials to designated areas and clean up thoroughly when finished with the lab activity. • Dispose of chemicals as instructed. 13.Any accident must be properly reported to the instructor.

  8. 14. Wash hands before leaving lab. • 15. Know the location and proper use of the following safety equipment: • fire extinguisher • fire blanket • goggles • eyewash • safety/drench shower • emergency call-back button • first aid kit

  9. 16. Know the proper safety procedures for the following situations: • fire • chemical splash to the body • eye emergency • chemical spill • cuts • burns Rule of Thumb: TELL THE TEACHER!

  10. AGHS Lab Safety Rap http://www.youtube.com/watch?v=xJG0ir9nDtc

  11. What do scientists do?

  12. Scientists make observations!

  13. How well do you observe? YOU can't pass this OBSERVATION TEST http://www.youtube.com/watch?v=u7Pmke-XLUU&feature=related

  14. Observations can be qualitative or quantitative Qualitative: observations using only the senses! Quantitative: observations that use numbers or measurements or make relative comparisons such as more than, all, less than, few, or none.

  15. Candles What kinds of qualitative and quantitative observations could you make about these candles? Quantitative Data: • Qualitative Data:

  16. What kinds of qualitative and quantitative observations could you make about this latte?

  17. latte What kinds of qualitative and quantitative observations could you make about this latte?

  18. Let’s practice!

  19. Observation Activity

  20. Qualitative: Quantitative: - Before: - Before: 1.___________________ 1._______________________ 2.___________________ 2._______________________ 3.___________________ 3._______________________ - During: 1.___________________ 1. _____________________ 2.___________________ 2._____________________ 3.___________________ - After: - After: 1.___________________ 1._________________________ 2.___________________ 3.___________________

  21. Bellwork # 3 OIP Aug 23/26 Copy and complete the following for the picture shown: • 3 qualitative observations: 1. 2. 3. • 3 quantitative observations 1. 2. 3. • 1 inference 1. • 1 prediction 1. Homework: Complete observation, inference, prediction, opinion practice sheet.

  22. Scientists make inferences! Inference: An explanation or interpretation of an observation.

  23. Inferences • They are not the final explanations of the observation. • There may be several logical inferences for a given observation. • There is no way to be sure which inference best explains the observation without further investigation.

  24. What observations can you make about the picture? What inferences can you make to explain your observations?

  25. What inferences can you make to explain your observations? What observations can you make?

  26. OBSERVATION OR INFERENCE? The bell is ringing observation

  27. OBSERVATION OR INFERENCE? The flower has red petals

  28. OBSERVATION OR INFERENCE? The boy has tears in his eyes, so he must be sad. inference

  29. OBSERVATION OR INFERENCE? There is a lot of red in the painting, so I think the artist was mad when he painted it. inference

  30. OBSERVATION OR INFERENCE? The dog has 3 legs. He must have been hit by a car. Observation then inference!

  31. Scientists make predictions! Prediction: An inference made about what will happen in the future; it is based on observations, available data, and prior knowledge. A prediction is not just a guess!!

  32. What predictions can you make? Are the predictions realistic and based on prior experience?

  33. Bellwork # 4 OIP • Pick up the sheet from the corner of the desk and complete the side with the man sitting in a chair. • Have your, observations, inferences, and prediction homework on your desk for me to check. Homework: Complete testable questions, variables, and OIP (back of BW #3) practice worksheets.

  34. Observation, Inference, and Prediction Activity (aliens)

  35. Today • Discuss and share OIP pictures • Discuss BW answers • Take notes for testable question • Identify testable questions • Take notes on variables • Identify variables

  36. They ask a testable question How do scientists design an experiment? They research information about the topic They state a hypothesis They design an experiment to test the hypothesis They conduct the experiment , collect data, and analyze the results They draw a conclusion. Was the hypothesis correct? They communicate the results

  37. First, they ask a testable question. What is a testable question? One that can be answered by designing and conducting an experiment!

  38. Which of the following are testable questions? How does stirring affect the rate that salt dissolves in water? Does pizza taste better than chicken nuggets? Do cold temperatures affect the amount fruit produced by an apple tree? What variables can affect attendance at a football game? Is Batman a better superhero than Superman?

  39. TESTABLE OR NOT TESTABLE EXAMPLES (T or NT) ___ 1. If I give the plants fertilizer, then the plants will grow taller than the neighbor’s plants. ___ 2. If I get lucky then the plants will grow bigger. ___ 3. My plants aren’t growing bigger because I do not water them enough.

  40. Testable Question Practice (Posing a question) Identify 5 testable questions and 5 non-testable questions.

  41. Testable questions are ones that allow you to change only one variable at a time to determine how it affects the outcome. Independent (manipulated) variable: the thing that is changed or tested in the experiment. Dependent (responding) variable: the result or the response to the changes made.

  42. For example: One of the testable questions we looked at earlier was: • How does stirring affect • the rate that salt dissolves in water? Stir Stirring is the independent variable because the investigator can decide how fast, how slow, or how often to stir. What is the investigator going to do? The rate the salt dissolves So, the rate the salt dissolves is the dependent variable because the it depends on the stirring. What changes because of the stirring?

  43. All good experiments have an independent variable and a dependent variable. But they also have some variables that stay the same. These are the constant variables in the experiment. • There can be only one independent variable for a successful experiment!

  44. For example: Samantha did an experiment with an electromagnet made from a battery and wire wrapped around a nail. Different size nails were used and the number of paper clips that the electromagnet could pick up was measured. Different size nails number of paper clips that the Electromagnet could pick up • Identify: • Manipulated variable • Responding variable • Constant variable(s) Remember, the constant variables are the one that are kept the same or unchanged! Remember, the dependent (responding) variable is the one that changesor responds! (Usually the variable you are measuring.) Remember, the independent (manipulated) variable is the one that is changed or tested in the experiment! The size of the nail Number of paper clips picked up battery, wire, number of times the wire was wrapped around the nail

  45. For example: A student conducts an experiment to test whether changing the surface of the floor will affect the distance a toy car will roll. the surface of the floor affect the distance a toy car will roll. • Identify: • Manipulated variable • Responding variable • Constant variable(s) Remember, the constant variables are the one that are kept the same or unchanged! Remember, the dependent (responding) variable is the one that changesor responds! (Usually the variable you are measuring.) Remember, the independent (manipulated) variable is the one that is changed or tested in the experiment! The type of surface Distance the car rolls Same toy car, pushing the car with the same force each time

  46. Another one… Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. manipulated variable: Responding variable: Constant variable: • age of students • assembly time • same puzzle

  47. Last one… An experiment was done to determine if temperature would have an effect how fast a turtle moved. manipulated variable: Responding variable: Constant variable: • temperature • how fast turtle moved • same turtle

  48. Bellwork# 3 Testable Question Copy the following and label as testable (T) or not testable (NT): Does the color of a surface affect its temperature? Is feeding a snake a live animal wrong? How many cats are in the world? Does the mass of a toy car affect the distance it travels? Homework: Complete hypothesis and posing questions practice worksheets.

  49. They ask a testable question How do scientists design an experiment? They research information about the topic They state a hypothesis They design an experiment to test the hypothesis They conduct the experiment , collect data, and analyze the results They draw a conclusion. Was the hypothesis correct? They communicate the results

  50. Bellwork # 4 Scientific Method • Standard: Scientific Method 8-1.1 Design a controlled scientific investigation. • 8-1.2 Recognize the importance of a systematic process for safely and accurately conducting investigations. • 8-1.5 Explain the importance of and requirements for replication of scientific investigations. Bellwork#3: Scientific Method Copy the steps of the scientific method as they are written. Now, go back and place them in order by writing the correct number beside each. _____Research the problem _____Observe and record _____Make a hypothesis _____Identify the problem _____Arrive at a conclusion _____Test the hypothesis Homework:

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