Definitions
SpongeBob Experiments
Identify the I.V. and D.V in the Hypothesis
Write a Hypothesis: If (IV), then (DV) because...
Synonyms
100

The steps that describe how to do an experiment.

Procedure

100
Sponge Bob notices that his pal Gary, the snail, is suffering from a nasty slime that gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that rubbing plankton on his shell will be a better cure. Sponge Bob decides to test this cure by rubbing 1/2 of Gary's shell with seaweed and the other 1/2 with plankton for 1 week. After a week of treatment, the slime is gone and Gary’s shell smells better. What is the independent variable? What is the dependent variable?
The independent variable is the "Treatment Used on Shell". The dependent variable is the, "Amount of Slime after 1 Week".
100
If we increase the amount of salt in water, then an egg will float higher.
I.V.= Amount of Salt D.V.= Egg Floating Height
100

Testable Question: Will a 5 pound bowling ball or a 10 pound bowling ball hit the ground first if dropped from the same height at the same time?

Hypothesis: If a 5 pound bowling ball and 10 pound bowling ball are dropped from the same height at the same time, then they will hit the ground at the same time because gravity pulls on them equally.

100

The directions are also known as the...

procedure

200

Data that is analyzed and/or calculated after an experiment is finished.

The Dependent Variable, the Results

200
Mr. Krabs created a secret ingredient for a breath mint that he thinks will “cure” the bad breath people get from eating crabby patties at the Krusty Krab. He asked 100 customers with a history of bad breath to try his new breath mint. He had fifty customers (Group A) eat a breath mint after they finished eating a crabby patty. The other fifty (Group B) also received a breath mint after they finished the sandwich, however, it was just a regular breath mint and did not have the secret ingredient. Both groups were told that they were getting the breath mint that would cure their bad breath. What is the independent variable? What is the dependent variable?
The independent variable is, "Type of Breath Mint". The dependent variable is, "Smell of Breath".
200
If a marble is dropped from a greater height, then the hole it makes in the sand will be deeper.
I.V.= Drop Height D.V.= Hole Depth
200

Testable Question: How does the temperature of ketchup affect how fast it flows?

Hypothesis: If the temperature of ketchup is increased, then ketchup will flow faster because warm things move more.

200

An "educated prediction" is also known as...

hypothesis

300

The variables that stay the same for each sample being tested in an experiment.

constant variables

300
Larry was told that a special muscle lotion can double a person’s muscle power. Interested in this product, he buys the special muscle lotion and recruits 10 people to be part of his experiment. Larry developed a 90 day workout program and measured the results. 5 of the people used the special muscle lotion before they started lifting weights while the other 5 used normal skin lotion(they were told it was the special muscle lotion). What is the independent variable? What is the dependent variable?
The independent variable is the, "Type of Lotion". The dependent variable is, "Strength of Muscles"
300
If the path of the sun is higher in the sky, then the shadow length will be shorter.
I.V.= Location of Sun D.V.= Shadow Length
300

Testable Question: What happens to the temperature of boiling water when salt is added?

Hypothesis: If more salt is added to the boiling water then the temperature of water will increase because...

300

Measurable Data

Quantitative

400

You sometimes have a control level in an experiment. It is the starting or normal experiment.  The other levels are called the experimental levels. Do you always have an experimental level?

Yes, but you do not always have a control level.

400
Squidward loves playing his clarinet and believes it attracts more jellyfish than any other instrument he has played. In order to test his hypothesis, Squidward played a song on his clarinet for a total of 5 minutes and counted the number of jellyfish he saw in his front yard. He played the song a total of 3 times on his clarinet and repeated the experiment using a flute and a guitar. He also recorded the number of jellyfish he observed when he was not playing an instrument. What is the independent variable? What is the dependent variable?
-The independent variable is, "Type of Instrument". -The dependent variable is, "Fish Attraction/Number of Fish Attracted".
400
If you drop a tennis ball that was soaked in boiling water, room temperature water, and ice water, then the tennis ball soaked in ice water will have the lowest bounce.
I.V.= Temperature of Tennis Ball D.V.= Bounce Height
400

Testable Question: What happens to the buoyancy of an egg when salt is added to water.

Hypothesis: If more salt is added to water, then an egg will be more buoyant because...

400
The "testing group" is also known as the...
Experiment group
500

The type of observations that use words to describe data collected during an experiment.

qualitative observations

500
Patrick believes that if fish eat food exposed to microwaves then they will become smarter, therefore being able to swim through a maze faster. First, he has 20 fish swim through a maze and records the time it takes for each one to make it to the end. He then places fish food in a microwave for 1 minute. Next, he feeds the microwaved food to 10 fish and gives non-microwaved food to 10 other fish for 1 week. After 1 week, he has all the fish swim through the maze again and records the times for each to see if they are any faster/smarter. What was Patrick’s hypothesis? What is the control variable? Which fish are in the control group? What is the independent variable? What is the dependent variable?
-The independent variable is, "Type of Fish Food" -The dependent variable is, "Time to Complete Maze/Smartness"
500
If the fulcrum of a lever is moved closer to the object being lifted, then less force is required to lift the object. .
I.V.= Location of Fulcrum D.V.= Amount of Force
500

Testable Question: What happens to amount of time it takes for a pendulum to complete a full swing when the length of the pendulum is longer?

Hypothesis: If the length of a pendulum is increased, then the time it takes to complete a full swing will also increase because...

500
The "no treatment group" is also known as...
control group
M
e
n
u