1.1 & 1.2 Material
1.3 Material
1.4 Material
1.5 Material
Lab Safety & Variables
100
Science involves having & ___ knowledge.
gaining
100
True or False: The scientific method is a predictable order of events.
False
100
What does CER stand for?
Claim, Evidence, & Reasoning.
100
Scientist use ___ when taking measurements during experiments.
SI (International System of Units)
100
What piece of lab safety equipment helps you if a chemical splashes into your eye?
Eye wash station
200
This is the rate (pace) that scientific knowledge changes.
usually slow, but occasionally in big leaps forward
200
Define control variable?
Anything that is kept the same between trials in an experiment.
200
What is one key word that can help you identify reasoning?
since, thus, therefore, as you can see, we can conclude, etc.
200
True or False: It is ok to be accurate, but not precise in science.
False
200
What are three things you can do to help keep you safe during a lab?
Read & follow the directions, report accidents immediately, handle broken glass with a broom, know the location of safety equipment, etc.
300
The law of parsimony states that...
the simpler a theory is, the more likely it is correct.
300
What are two ways that scientists might share the results of their research/experiments?
Presenting their research at conferences, publishing articles, speaking to Congress to help solve problems, or talking directly to the people.
300
Evidence is all the ___ and facts that help support your claim.
data
300
What is the correct unit of measurement for length in science?
meter
300
Which two pieces of safety equipment can help in case of a fire?
fire extinguisher & fire blanket
400
Scientific laws tell ___ happens. Scientific theories tell __.
Laws = what
Theories = how
400
A testable hypothesis includes the words "IF...THEN...BECAUSE". What comes after each of these key words?
After IF - the independent variable (what the scientist is changing)
After THEN - the dependent variable (what is being measured during the experiment)
After BECAUSE - the scientific rule that explains how/why the scientist believes their hypothesis is correct.
400
CER is directly related to what other science process?
The scientific method
400
Why is replication important in science?
When an experiment produces the same results after it is repeated by other scientists, the results become more credible - helping scientific knowledge to grow. If results cannot be replicated, it may show there were problems in the original experiment.
400
Identify the Independent, Dependent, & Control Variables in the following experiment:
Rob is in charge of waxing the floor at the local mall. He wants to test a new brand of floor wax called Squeaky Clean. Rob waxes 20 floor tiles with Squeaky Clean and 20 tiles with the original wax brand. After one week he counts the number of scratches on the floor.
Independent Variable = Brand of floor wax
Dependent Variable = Number of floor scratches
Control = 20 tiles with the original wax brand
500
What critical mistake did Alfred Wegener make when he shared his theory of continental drift? How did this impact his life?
He didn't have any evidence to support his claim, so other scientist mocked him & rejected his ideas. It wasn't until after he died that there was evidence to prove he was actually correct.
500
State the steps of the scientific method (in any order). There were 7 in the text.
observe, question, research, hypothesis, experiment, conclude, communicate
500
Read the scientific question & the four statements that could be used to answer the question using CER. Identify each statement as claim, evidence, or reasoning.
Question: Are cells all the same shape.
Statement A: Since animal cells, plant cells, and bacteria cells have different shapes, cells do not have just one shape.Cells can have different shapes.
Statement B: Animal cells are irregular and round in shape. In plants, the cell wall surrounds the cell membrane giving them a unique rectangular shape.
Statement C: Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes).
Statement D: Cells can have different shapes.
Statement A: Reasoning
Statement B: Evidence
Statement C: Evidence
Statement D: Claim
500
Accurately create models that show: 1. good accuracy & good precision 2. poor accuracy & good precision 3. poor accuracy & poor precision
500
Identify the Independent, Dependent & Control Variables in the following experiment:
Nicholas has been biting his nails since he was a kid. He wants to break the habit so he puts bitter tasting nail polish on his left hand and leaves his right hand without polish. After 3 days he notices his nails on his left hand have grown but he continued to bite his right hand nails.
Independent Variable = Bitter tasting nail polish on left hand
Dependent Variable = Length of fingernails
Control = Right hand with no polish