test 1 Flashcards
Give an example of a hypothesis in the correct format.
If I wear Nike running shows, then I will have a better mile time.
Explain the relationship between IV and DV within a hypothesis.
The IV is the cause and the DV is the effect.
Differentiate between an observation and an inference.
Observation- description of something, not an opinon.
Inference- a guess based on your observations, can make multiple inferences from a single observation.
Explain the difference between accuracy and precision and the significance of having data that is both.
Accuracy- how close your measurment is to the correct value. (correctness)
Precision- how close your measurements are to each other. (closeness)
If you have both, then you have consistent, specific, and always correct data whcih helps you to verify your results.
List the general steps in designing and conducting an experiment.
- Make an observation
- Ask a question
- Research
- Form a hypothesis
- Come up with procedures
- Experiment
- Analyze the data
- Draw conclusions and communicate them
Give an example of a scientific investigation design, with appropriate constants and variables. (DV and IV)
Josh wants to know if a brand of shoe (IV) makes you run faster (DV). He gathers a group of 5 runners, all of them with similar mile times (constant). Every day, they go out at 6:00 am (constant) and run a mile. The first day they run in their preffered shoe, Nikes (control group). The second day they run in Adidas, the third day they run in New Balance, and the fourth day they run in Hokas (expieremntal group).
Explain the general steps of the technological design process and the criteria that must be considered when designing a solution.
- Identify a problem. 2. Design a solution, 3. Build and test 4. Evaluate.
Perfect design = not possible, but benefits > than risk.
Constraints such as time and cost effectivness are also important.
Give an example of a qualitative observation.
The dog is brown.
Give an example of a quantitative observation.
There are six dogs.
List one inference from the following statements: The dog has a collar and a pink bow in its hair.
The dog is a girl.
What should you wear to protect your clothes in the lab?
Apron
What should you wear to protect your eyes in the lab?
Goggles
If something breaks what is the FIRST thing you should do?
Tell Mrs. Vanhoose
What should you do with long hair in the lab?
Tie it up
How should your lab station always look?
Clean
T or F: Saftey goggles must be worn at all times while working in the lab, even when cleaning up after an experiment.
True
T or F: The fire blanket should be used to smother chemicals that have caught fire.
False, used if SOMEONE is on fire
T or F: Hot plates should be turned off when not in use unless they are going to be used again in the next class period.
False
T or F: It is occasionally permissible to taste substances in the lab to determine their identity.
False
T or F: The teacher should be modified to all chemical spills unless they are very minor.
False