Scientific Method review
Presentation
•
Science
•
9th Grade
•
Practice Problem
•
Easy
+6
Standards-aligned
Beth Boudreaux
Used 140+ times
FREE Resource
7 Slides • 15 Questions
1
Scientific Method review
2
Independent Variables
A independent variable is the variable that the experimenter purposes changes or manipulates. The independent variable is the cause, input, or what is being done during the experiment.
3
Dependent Variables
A dependent variable is the variable that changes in response to the changes in the independent variable. The dependent variable is the effect, output, or what happens during the experiment.
4
Control variables (constant variables)
these are the elements that are kept the same during a scientific experiment. Any change to a controlled variable would invalidate the results.
5
Read the problems and identify the independent, dependent variable in each as well as constant variables.
6
Multiple Choice
The higher the temperature of the water, the faster the egg will boil. What is the Independent variable? (The 'cause' in a 'cause-effect' relationship)
The temperature of the water
The egg
The time the egg takes to boil
The type of egg
7
Multiple Choice
The higher the temperature of the water, the faster the egg will boil. What is the dependent variable (the effect)
The egg
The temperature of water
The type of water
The time it takes the egg to boil
8
Multiple Choice
Students of different age groups were asked to put the same jigsaw puzzle together, they were timed to see how long it took. What is the dependent variable?
Age of students
The jigsaw puzzle size
The time to complete puzzle
The music they listened to
9
Multiple Choice
Students of different age groups were asked to put the same jigsaw puzzle together, they were timed to see how long it took. What is the independent variable?
The age of the student
The jigsaw puzzle
The time to complete puzzle
The music they listened to
10
Open Ended
Do tomatoes grow fastest under fluorescent, incandescent, or natural light? What is the independent variable?
11
Open Ended
Do tomatoes grow fastest under fluorescent, incandescent, or natural light?
What is the dependent variable?
12
Open Ended
Do tomatoes grow fastest under fluorescent, incandescent, or natural light?
List as many constant variables that you can think of.
13
Open Ended
How does phone use before bedtime affect sleep?
What is the dependent variable?
14
Multiple Choice
Albanee is performing a test in which she is trying to see if plants can grow when given fizzy drinks instead of water. She gives one plant water and a second identical plant the same amount of fizzy drink for two weeks. What is the independent variable?
The plants
The amount of liquid
The type of liquid
Sally
15
Multiple Choice
Albanee is performing a test in which she is trying to see if plants can grow when given fizzy drinks instead of water. She gives one plant water and a second identical plant the same amount of fizzy drink for two weeks.
What is the dependent variable?
The plants' growth
The amount of liquid
The type of liquid
Sally
16
Multiple Select
Albanee is performing a test in which she is trying to see if plants can grow when given fizzy drinks instead of water. She gives one plant water and a second identical plant the same amount of fizzy drink for two weeks.
What are two constant variables from the experiment?
The type of plants
The amount of liquid
The type of liquid
The plants' growth
17
Open Ended
Sam carried out an investigation to see how the strength of an electromagnet coil changes with the number of coils. What is the dependent variable?
18
Question: Do different types of music affect how well a person can do his/her homework?
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Hypothesis: Music that does not have a strong beat makes concentrating on a homework assignment easier. Music with heavy beats makes concentration more difficult.
20
Open Ended
David pulled out four different CD’s to find out which type helped him to finish his homework the fastest. The first CD was rock, the second rap/hip-hop, the third classical, and the fourth was country. He chose a math assignment that required concentration. David used a stopwatch with an alarm to make sure that he only listened to each CD for 5 minutes. Each time the alarm went off, he recorded how many problems he was able to finish. Identify the:
Independent Variable (IV)
Dependent Variable (DV)
Constant Variables (list two)
21
Open Ended
Type of music - Problems (quantified data)
Classical - 7
Rock - 5
Country - 4
Rap/hip-hop - 2
Summarize the results of David's experiment
22
Poll
How would you rate yourself in 'differentiating between the independent and dependent variables?'
Got it, can help someone else get it!!
Think I got it, may need to practice more with a quizizz
I need more help than practice
I got nothing
Scientific Method review
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