Definitions
These variables stay the same throughout the whole experiment.
What are controlled variables?
There are three types of ______.
What is variables?
The scientist wanted to test a ball's ability to bounce. She then bounced the same ball on grass, cement, and mulch.
What is the independent variable?
The grass/cement/mulch. (surface ball is bounced on)
Addy wanted to determine whether a more expensive cell phone had a longer lasting battery than a cheaper model. Addy texted her many friends 5,000 times in a day from the expensive phone, then checked the battery power remaining. Then Addy sent the exact same texts from the cheap phone to the same 5,000 friends and checked battery power.
What is/are the control variable(s).
Same texts.
Same friends.
Same day.
This type of CHANGE happens when a third type of matter occurs.
What is a CHEMICAL CHANGE.
What is measured in an experiment or the results in an experiment.
What is a dependent variable?
In an experiment, what a scientist measures or observes at the end is called the ___________.
What is dependent variable?
Athletes drank Gatorade before some games, but did not drink Gatorade before other games. The athletes discovered that on "Gatorade days" they performed better in the games.
What is the dependent variable?
Athletic performance. (How athlete performed)
Brook had 3 pet turtles. She decided to test which kind of music her turtles like best. Brook knew that the turtles would stick their head in their shells if they didn't like the music! Brook played country music on Monday for 30 minutes to the turtles. The next Monday, she played rock music for 30 minutes. The next Monday, Brook played opera music.
What are the control variables?
The 3 turtles.
The 30 minute length of time.
The day of the week.
Malleability is a physical property that means this.
What is flexible or bendable?
This is the changing variable in an experiment.
What is an independent variable?
In an experiment, what the scientist changes is called the _____________.
What is independent variable?
Cameron grew turkeys in his bedroom. He fed one of his feathered friends corn, one Tostitos, and one pizza. Cameron weighed the turkeys every week to determine which type of feed caused the turkey to grow fastest.
What is the dependent and independent variable?
Dependent Variable: turkey growth
Independent Variable: food
Jeremy decided to see if his pet kangaroo preferred chocolate ice cream, strawberry ice cream or vanilla ice cream. Jeremy gave "Mrs. Freeman" (the name of his kangaroo!) one scoop of chocolate ice cream on Monday, one scoop of strawberry ice cream the next Monday, and one scoop of vanilla on the next Monday. He then recorded the data.
Scoop of ice cream.
Day of the week.
What type of matter has a definite VOLUME, but DOES NOT have a definite SHAPE?
What is LIQUID?
This is a scientific test used to make a discovery.
What is an experiment?
________ are kept the same throughout an experiment.
What is controlled variables?
Dylan loves video games. He decided to perform a controlled experiment to determine what time of day he got the highest score. He played for the same amount of time in the morning, at noon and at night. Dylan found he was at his best at night.
What is the Independent Variable and Dependent Variable?
Independent Variable: time of day
Dependent Variable: game score
Kaleb wanted to see which type of liquid would help his candy cane crop grow fastest. He put 3 types of the same candy cane in three same size pots, with the same type of snow (candy canes grow in SNOW!). Kaleb watered Cane #1 with diet Mt. Dew. Kaleb watered Cane #2 with root beer, and Cane #3 with hot chocolate. Each candy cane received the same amount of liquid, to be FAIR, of course!
What are the controls?
Candy canes
Pots
Same amount of liquid
This type of particle matter is arranged in a regular pattern and vibrates.
What is a SOLID.
There are 3 of these in a controlled experiment.
What is a variable?
In order to ensure a ____ test, there must be controlled variables.
What is fair?
Lydia wanted to find out if color of a food would affect whether preschoolers would choose it for lunch. She put food coloring in 2 identical bowls of macaroni and cheese. The colors were red and yellow. Each child chose a scoop of mac & cheese. Lydia tested every preschooler at Silver Creek. She recorded the students' choices.
Independent variable: food color
Dependent variable: Which color of food was chosen most often.
What are the controls?
Amount of liquid
Type of cup
Same freezer
This science law states that "the weight of matter doesn't change, even when the state of matter changes."
The Law of Conservation of Matter.