1 / 14

Lab Skills

Lab Skills. Next Level Science. Let’s practice some skills at…. Pete’s Pond. Analyzing Experiments. Good experiments … Can be replicated Have all variables Are carefully done. Analyzing Experiments. Watch out for …

karines
Download Presentation

Lab Skills

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lab Skills Next Level Science

  2. Let’s practice some skills at… Pete’s Pond

  3. Analyzing Experiments • Good experiments … • Can be replicated • Have all variables • Are carefully done

  4. Analyzing Experiments • Watch out for… • Bias – unfair prejudice for a certain result (ex- a company testing their own product) • Confounding Variables – unintended changes that mess up the results (ex- changing a lab rat’s food right before the experiment)

  5. After the Experiment • Results have to be verified by repeated trials and support/review from other scientists • It may take years, but eventually a hypothesis may be proven true.

  6. Science Skills: Observations, Predictions, and Inferences • Observations: using the five senses to gather info (cannot be wrong) • Ex: The chemical turned blue. • Predictions: making a guess about the future • Ex: When baking soda is added, the mixture will bubble. • Inferences: coming to a conclusion (a guess) about the past or present • Ex: The chemical turned blue because the mixture contained sugar.

  7. Science Terms: Hypothesis, Theory, and Law • A hypothesis is not proven • a PROVEN hypothesis becomes • a LAW if it is just an observation (no why or how) • Ex: What goes up, must come down = The Law of Gravity • a THEORY if it is a proven explanation. • Ex: Gravity is caused by an attractive force that exists between two bodies that have mass = The Theory of Gravity • Note: a Theory will never become a Law or vice versa!

  8. Analyzing Experiments Practice Let’s try it…

  9. Analyze This… • Jordan is doing a project on the effect of music on plant growth. He has two tomato plants (plant A and plant B) that he grows in a window and gives the same amount of water. Plant A is exposed to classical music through headphones attached to the soil. At the end of the experiment, Jordan counts the number of tomatoes produced by each plant. Plant A = 35 tomatoes. Plant B = 55 tomatoes. • Control group? • Independent variable? • Dependent variable? • Constant? • Conclusion?

  10. Analyze This… ANSWERS • Jordan is doing a project on the effect of music on plant growth. He has two tomato plants (plant A and plant B) that he grows in a window and gives the same amount of water. Plant A is exposed to classical music through headphones attached to the soil. At the end of the experiment, Jordan counts the number of tomatoes produced by each plant. Plant A = 35 tomatoes. Plant B = 55 tomatoes. • Control group? Plant B • Independent variable? Music • Dependent variable? Number of tomatoes produced • Constant? Same type of plant, same window, same water • Conclusion? Music does not help tomato growth

  11. Identify This… • Identify the statements as an observation, prediction, or inference • The cookies taste better with a little salt. • The cookies with shortening will be crunchier than the cookies with butter. • The whole wheat flour caused the cookie to turn too dark.

  12. Identify This… ANSWERS • Identify the statements as an observation, prediction, or inference • The cookies taste better with a little salt. Observation. • The cookies with shortening will be crunchier than the cookies with butter. Prediction. • The whole wheat flour caused the cookie to turn too dark. Inference.

  13. Identify This… • Identify the statements as a hypothesis, theory, or law. • Organisms have adapted to their environments through years of accumulated genetic change. This is why each type fits its environment. • Across all species, male birds are always more colorful or the same color as the females. Females are never more colorful. • If peppermint essential oil is used, then acne will clear faster.

  14. Identify This… ANSWERS • Identify the statements as a hypothesis, theory, or law. • Organisms have adapted to their environments through years of accumulated genetic change. This is why each type fits its environment. Theory • Across all species, male birds are always more colorful or the same color as the females. Females are never more colorful. Law • If peppermint essential oil is used, then acne will clear faster. Hypothesis

More Related