SI unit Conversions
A standard is
an exact quantity that people agree to use for comparison.
When all measurements are made using the same standard, the measurements can be compared to each other.
Hypothesize rule- play a card
Support or refute hypothesis – card is accepted/rejected
Collect data-study accepted cards on the table
Search for order,postulate a rule-find a pattern in data
Experiment and predict result-play your next card
Alter or discard rule in light of new evidence-the play progresses
Publish results-tell the rule
Common SI Prefixes
Measurements in SI is based on powers of ten
10m = 1Dm
10dm = 1m
When converting from a larger to a smaller unit, multiply
Ex#1 How many cm are in 1.98 m?
Ex #2 How many cm are in 253.8 km?
x 10000 = 25380000cm
Ex #3 A bookshelf is 75 cm wide, how many dm is this?
How many meters would this be?
75 cm/10=7.5 dm
SI Base Units
Amount of sub.
Intensity of light
Complete the following
The End of King Henry’s Foot
Chp 2 Scientific Methods in Biology(Four sheets)
The Scientific Method
The common steps that biologists and other scientists use to gather information to solve problems are scientific methods.
The Scientific Method consists of seven steps
State the Problem (This is usually in a question form)
Research the Problem
Step 3: Develop a Hypothesis
Step 4: Perform the Experiment (List your materials and the procedures)
Step 5: Organize the Data
Analyze the Data
State the Conclusion
Who is Katharine Payne?
"Katharine Payne is a biologist..."
Katharine Payne is a biologist who suspected that the vibrations on the elephant’s ear were generated by the elephants and that they might be using the sounds to communicate.
What was Payne’s hypothesis?
A hypothesis is a testable explanation for a question or problem.
"Deductive reasoning involves suggesting t..."
Deductive reasoning involves suggesting t hat something may be true about a specific case from know general rules.
If the dog is panting, she must be hot and need water
What is a control?
A control is the standard in which all conditions are kept the same. The experimental group is the test group in which all conditions are kept the same except for the single condition being tested.
"In a controlled experiment,"
In a controlled experiment, only one condition is changed at a time. The condition in an experiment that is changed is the independent variable
"While changing the independent variable"
While changing the independent variable, the scientist observes or measures a second
condition that results from the change. This condition is the dependent variable.
Complete the minilab on page 30
Scientific tools(Refer to Lab Manual page xiv)
Test tube racks
Test tube brush