Definitions
the systematic study of natural events and conditions based on observations
what is science?
The one thing that is varied in the experiment.
What is the independent variable.
It is the thing that will change, that you intend to measure.
What is dependent variable.
Must stay the same between the groups.
What is controlled variables.
The step of the scientific method where you are using your 5 sense
What is make an observation.
statement based on observations. It may be true or false.
inference
Is the size of fish affected by the depth of the ocean they live? What would be the IV?
What is depth of ocean.
A group of scientists test whether or not having recess in school helps students concentrate. What is the independent variable?
what is having recess or not
You are testing if different amount of light affect plant growth. What is one thing that needs to be the same between all the plants for experiment to be valid?
What is soil, fertilizer, type of plants, amount of water, time of test, LOTS of options
Can't be amount of light because that's the IV or plant growth because that's the DV
The if...then statement that is testable.
What is a hypothesis.
Fake science *spelling does not count*
pseudoscience
Do plants surrounded by earthworms grow faster than plants with no earthworms? What would be the DV?
what is whether or not there are earthworms
You want to see if students do better on a test if they study with music. You divide up one class into 2 groups of 15 students. Group A listens to music while studying their notes for 1 hour a night. Group B studies their notes with no music for 1 hour a night. After two weeks, a comprehension test was given to all students after they had studied their notes in silence or with music turned on. What is one controlled variable in this experiment?
LOTS! two weeks time frame, 1 hour a night studying, 2 groups of 15 students, test is the same
NOT music or no music, that's the IV or grade on test, that's the DV
The part of the scientific method that data is collected.
What is the experiment.
statement made by using your 5 senses. It's always true. This type is descriptive and does NOT have numbers
qualitative observations
Does spending time with a pet dog decreases the amount of stress a person has? What is the dependent variable??
What is the amount of stress.
A researcher wants to investigate how social behaviors develop in children in day care depending on the amount of time the child spend in day care. What is the dependent variable?
What is social behavior in children.
One tank of gold fish is fed the normal amount of food once a day. A second tank is fed twice a day. A third tank is fed four times a day during a six week study. The fish’s weight is recorded daily. What are 2 controlled variables?
LOTS! The tanks, the goldfish type, the type of food, 6 week study, weight recorded in the same way, weight recorded daily
NOT amount of food, that's the IV, or weight, that's the DV
When multiple experiments have been conducted, data is analyzed and you know the results. The last step is to _____________.
statement made by using your 5 senses. It's always true. This type DOES have numbers
quantitative observation
Students at a University were split into two groups and each received a different text for a philosophy course. Once group received a traditional text book, while the other received a digital textbook on an iPad. After the course, the final exam scores between the two groups of students was compared. What is the independent variable?
What is the type of textbook.
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week. What is the independent variable? the dependent variable? and one controlled variable? You must get all 3 correct to earn any points.
IV-different humidity levels
DV-Height of redwood tree
CV- type of tree, temperature of tree, amount of water, amount of nutrients, etc.
A farmer wants to know if the amount of air flow affects his apple tree yield. He places fans around one orchard of apples and doesn't on another. What would 3 controlled variables be for this experiment?
LOTS! type of apple, age of trees, how often apples are collected, how apples are weighed, the amount of fertilizer, the amount of water, the amount of sunlight
NOT the amount of air flow, that's the IV, or the yield of apples, that's the DV
Arrange these steps of the scientific method in the correct order:
Experiment, Share the Results, Hypothesis, Ask a Question, and Analyze the data
What is:
1. ask a question
2. make a hypothesis
3. experiment
4. analyze the data
5. share the the results