Lab Safety
Why is it important to follow lab rules?
So no one gets hurt
What is the final step of the scientific method?
Conclusion
What are the two steps needed when doing metric conversions?
1. number of places to move
2. direction to move
When are non-zeros (1-9) significant?
ALWAYS
Which variable goes on the X axis?
Independent
What are the independent and dependent variables?
independent - manipulated or changed
dependent - responds to/because of the independent
What should AND shouldn't you wear to class on lab day?
Should: Close toed shoes, hair tied back
Shouldn't: open-toed shoes, loose clothing, dangling jewelry
The step where you notice a problem or phenomenon and wonder why it occurs
Observation / Question
How do you know which direction to move the decimal?
If you are going to a larger measurement, move left (Larger Left)
Going to a smaller measurement, move right
When is 0 significant?
Between two nonzeros
At the end of a number with a decimal
Which variable goes on the Y axis?
Dependent
A good way to formulate your hypothesis is in an "if-then" statement.
Give an example of a hypothesis in this format.
If sdknakd. THEN sol D
What are the two most important lab safety accessories?
Goggles and gloves
What is the main requirement for a hypothesis?
It must be testable
Name one way to decide how many decimal places to move
Adding exponents
Counting on Metric Line
When is 0 not significant?
When it is before the first nonzero (1-9)
When it is at the end of a number w/o a decimal
What is the difference between the control group and the experimental group?
The independent variable is not applied to the control group
What are the two requirements for a "controlled" experiment?
1. has a control group
2. only manipulate/change one variable at a time
Who should clean up broken glass?
Teacher ONLY
What is the difference between a hypothesis and a theory?
Hypothesis - little evidence
Theory - tons of evidence
In the acronym Most Kings Hate Dragons Because Dragons Can't Make Money Now, what does "dragons" represent?
The prefix deka (dk)
Give an example of a number with a significant 0
answers will vary
If you have a number in scientific notation with a negative exponent, is that number very small or very large?
Very small
If you wish to test the effects of 3 different levels on sunshine on tomato plants, how many groups should you have?
3 experimental groups and 1 control group
Why can't we dispose of chemicals down the drain?
They can harm the drain, rivers, and oceans
List the steps of the Scientific Method in order
Observe
Hypothesis
Experiment
Results
Conclusion
Convert 1,502 cm to hm. Explain the steps you use
1. direction: towards larger, larger LEFT
2. number: add exponents (2 + 2) or use metric line
1,502 cm = 0.1502 hm
Give an example of a number with at least one significant 0 AND at least one non-significant zero
leading zeros are never significant
What is a direct relationship and what would it look like on a line graph?
Both variables increase together, line pointing towards upper right corner of graph
Design an experiment to test the effects of different humidity levels (60%, 70%, 80%) on plant growth. You have at your disposal 120 plants.
Answers should include groups, IV, DV, hypothesis, and controls