Variables
The variable that is changed for testing its effect on what is being measured.
What is the independent variable.
The framework for writing a hypothesis
What is an "If, then, because" statement
When writing a C.E.R conclusion, C stands for claim, which is in other words, ___________________
What is "answering the question"
The fire causing the smoke all over town
What is The Bear Gulch Fire
The variable on the Y-axis of a graph
What is the dependent variable
The E in CER stands for Evidence. How do you achieve two points for evidence when writing a conclusion?
What is :
- State the averages
- Do a number comparison with the averages
The name of the river that drains out of Lake Crescent
What is the Lyre River
These variables are not allowed to change because they could affect the results of the experiment.
What are control variables
If plants receive more sunlight, then they will grow taller. The independent variable is ______________________
What is the amount of sunlight
The most common size of worms found
(show graph)
What is 6.5-7 cm.
Grade this conclusion and explain:
"Heads held more water than tails. Heads held an average of 20 drops, which is twice the amount of drops that tails held, at just 10 drops."
3/4, missing the Reasoning (why tails held less than heads)
This is used as a "compare group" in order to determine if the experiment caused a change or if the results would have occurred on their own.
What is a control group
The independent variable in this experiment
(show graph)
What is amounts of sunlight for each plant
Grade this conclusion and explain:
"Tails holds an average of 35 drops, while heads holds an average of 32 drops. Heads held three drops less than water. This is likely because the tails side, being an old penny, contains the old Lincoln Memorial building, which has many grooves in it, allowing water to have more surface area to adhere to"
3/4, never stated a Claim.
"Leah, Wren, and Regina decide to test what factors influence water absorption by chicken eggs. They create three different water solutions: 100% distilled water, 50/50% corn syrup/distilled water, and 100% corn syrup. They measure the mass of each egg before and after soaking for 24 hrs, and calculate the change in mass.
What are the independent, dependent, and control variables?
What is:
Dependent = change in mass
Independent = Solution egg is placed in
Control = Type of egg, soaking time
Write a hypothesis for this question:
What is the effect of setting a timer on students in the quality of their answer?
What is:
"If you set a timer for a students then the quality of their answer will decrease, because of added psychological pressure."
or
"If you set a timer for a students then the quality of their answer will increase, because of decreased procrastination time."
Sketch a graph to this data:
(see image)
see image
Write a 4-point conclusion for this experiment that seeks to answer the following question:
What is the least effective way of cleaning your hands?
(show image)
What is:
The least effective way of cleaning your hands is by using hand sanitizer. Hand sanitizer had an average of 28 types of bacteria, roughly 2.3 times the amount of bacteria from a Soap A cleanse, which had 12 types. Soap B had a similar number from Soap A at 13 types. Sanitizer performed worse than the control group (warm water) at 24 types. This is likely due to the over use of hand-sanitizer creating antimicrobial-resistant bacteria on your hands.