Laboratory Automation II

1. Define a biological replicate and a technical replicate. Give an example of a hypothetical experiment and how you would sample these. what does each replicate type tell you?

 

Which of the following statements is not true of scientific experiments?

a. They must occur under carefully controlled conditions found in a laboratory.
b. They yield useful results regardless of whether the hypothesis is supported or rejected.
c. They must be well documented.

Select all correct answers

Hakeem is testing the effects of sunlight on samples of soil. Which of these actions would introduce confounding variables into Hakeem's experiment?

□ He tests a theory that's already been established.

□ He tests multiple hypothesis at a time.

□ He uses identical specimens when completing multiple trials.

□ He adjusts the independent variable and records the effects.

□ He uses different types of soil in each of his samples.

Grade 9 Science experiment:

Experiment:  Compare brands of paper towels, to see which holds the most liquid. The independent variable in your experiment would be the brand of paper towel. The dependent variable would be the amount of liquid absorbed by the paper towel.

Come up with a problem, explain how you are going to control the experiment using a dependent variable, and use appropriate formats for displaying the observed and recorded data. 

Experiment Proposal

Note: your purpose, hypothesis, materials, and procedure must be approved before you conduct your experiment!
Purpose: 

Hypothesis: 

Materials: 

Procedure: 

Observations: * Create your observation table here. Use this table to fill in your data during your experiment.

Conclusion: