IV and DV
Sheldon is recording the effect of motor oil on the growth of plants. He varies the amount of motor oil given to different groups of plants. Sheldon records the height of each plant over the course of several weeks.
IV: Amount of motor oil
DV: Height of the plants
Define a constant and give two common examples.
Constant: factors that remain the same throughout an experiment
Ex: temperature, humidity, salinity, species, etc.
What is the abbreviation for milliliter?
mL
What is the first step of the scientific method?
Observation
Solve this problem!
(4/5) x 100 = _______%
80%
Penny wants to test the best brand of vitamin A for felines. She gives her cat a different brand of vitamin A every month. At the end of each month, she records her cat's weight.
IV: Brand of vitamin A
DV: Cat's weight
What is a hypothesis?
An educated guess or prediction
14km = _____m
14000m
Why is repetition of an experiment important?
Reptation ensures accuracy
Calculate the average of 1+17+4+5+9+10?
7.667
Charlotte wants to test the pH of different water sources. She gathers various samples of water and tests their pH. She records her pH results in a table.
IV: Water Source
DV: pH of the Water
Compare and contrast a control group and an experimental group.
Control group: group that represents the "normal" conditions
Experimental Group: group exposed to the IV
2L = _____ mL
2000 mL
What is a control?
A trial that represents the "normal" conditions, serves as a comparison
Calculate the density:
Mass = 140g
Volume = 200 mL
Hint: Mass/Volume = Density
0.7 g/mL
JJ wants to compare the gas mileage between standard gas and eco-friendly gas. Whenever he fills his tank, he switches between standard and eco-friendly gas. When the tank runs empty, he calculates the miles traveled per tank.
IV: type of gas
DV: gas mileage
Describe the difference between a line graph and a bar graph.
Bar Graphs: rectangular bars whose lengths are proportional to the value they represent, no connections between data points
Line Graphs: data points connected by lines, relations between data points
7.5cm = _____hm
0.00075hm
Define C.E.R.
C=claim
E=evidence
R=reasoning
Find the volume of a solid with a length of 8cm, width of 10cm, and height of 3cm.
Hint: length x width x height = volume of a solid
240cm
Abby wants to test her sister's reaction time. Every night, she verbally engages her sister and records the amount of time taken for a reaction to occur. Abby tests various verbal phrases and records the reaction time for each.
IV: verbal phrase
DV: reaction time
What does extrapolate mean?
to extend/explore the graph, an educated guesstimate based on the recorded data
14.87mg = ______Dag
0.001487 Dag
What are the seven steps of the scientific method in order?
Observation
Question
Research
Hypothesis
Experiment
Analysis
Conclusion
Minnie planted 20 flowers. Sadly, 8 of them wilted and died while the remaining 12 thrived.
Calculate the percent of flowers that died.
Calculate the percent of flowers that survived.
40% died
60% survived