Show:
One
Two
Three
Definitions
Measurement
100
Why should variables be tested more than once?
To give an comparison
100
In a recent study, middle school students were given a math exam after various amounts of sleep. One group slept 8 hours or more, and the second group slept fewer than 8 hours. The students had similar skills in math. They ate the same meals the previous day. The study results showed that students who slept 8 hours or more scored better on the exam, while students who slept less than 8 hours scored worse. What is the Independent variable?
The number of hours slept
100
What is a hypothesis?
A possible explanation for an observation also known as an educated guess as to what will happen next
100
What is length?
The measurement from one point to the next
100
What standard measurement system is based on units of 10?
Metric System
200
Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. What is the independent variable?
The special Juice
200
Can you have more than one independent variable?
Yes
200
Why should a hypothesis be testable?
Researchers must be able to carry out investigations in order to prove or disprove the hypothesis
200
What is mass?
The measure of how much matter an object contains
200
What is a conversion Factor?
AN equation that shows how to units of measurment are related
300
Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. What is the dependent variable?
The number of stacks staples by each group
300
In spongebobs flower power experiment, what would the independent variable be?
The detergent
300
What is an independent variable?
The factor that a scientist changes during an experiment
300
What is a scientific law?
Is a statement that describes what scientist expect to happen everytime under a particular set of conditions
300
I minute equals how many seconds
60
400
Our science club built a catapult out of craft sticks, glue, and a rubber band. We wanted to deter mine what size rubber band was best for launching a gumball across the classroom. If the rubber band was too small, the gumball wouldn’t travel very far. If it was too big, it would be too loose to work well. We found that a rubber band with a circumference of 11 cm shoots the gumball the farthest. What variable changed?
The rubber bands size
400
What is the basic unit of Mass in rge SI system?
Kilogram
400
What is a dependent variable?
What is effected during the experiment
400
What is a controlled experiment?
An experiment in which only one variable is being manipulated at a time
400
How many Kilograms does it take to equal one gram?
1,000grams equals one KG
500
In a recent study, middle school students were given a math exam after various amounts of sleep. One group slept 8 hours or more, and the second group slept fewer than 8 hours. The students had similar skills in math. They ate the same meals the previous day. The study results showed that students who slept 8 hours or more scored better on the exam, while students who slept less than 8 hours scored worse. What is the outcome of the experiment?
Students with more sleep performed better on their exams
500
Why is it important to change one variable at a time?
That way you know if it has any effect
500
What is data?
Data are facts or figures and other evidence gathered through observations
500
What are variables?
Factors that change in the experiment
500
What does hecto mean?
100