Independent Variables
Which variable is the one the experimenter changes? (They want to test it).
Independent variable
Which state of matter has tightly packed molecules that vibrate in place?
Solid
What is the first step in the scientific method?
Which kind of variable is recorded or measured? It depends on the independent variable.
Dependent variable
Which kind of particle moves with the most speed out of solid, liquid, and gas?
Gas
What is the IV? A gardener decides to see how tall his corn crops will grow by watering one section with 2 gallons per day, one section with 3 gallons per day, and one section with 4 gallons per day for 2 weeks.
Amount of water
Which state of matter has no definite shape or volume? It's molecules move freely and rapidly.
Gas
What is an educated guess that can be tested by observations and experiments?
Hypothesis
What is the DV? A gardener decides to see how tall his corn crops will grow by watering one section with 2 gallons per day, one section with 3 gallons per day, and one section with 4 gallons per day for 2 weeks.
Height of corn crop/plant growth
What type of variable is kept the same across all tests?
Controlled variable
Sophia is concerned about her older cat's weight gain. She decides to see which brand of cat food helps her best maintain a healthy weight. She tests three different brands, one per month. She records her cat's weight once per week. What is her IV?
Cat food brand
Which state of matter has molecules that move and slide and takes the shape of its container?
Liquid
What is the term for information collected during an experiment?
Data
Yandel wants to know which kind of sneakers help him run the fastest. He tests 3 different styles of sneakers and measures his running time over 100 meters. What is his DV?
Running time
What is the term for a way a scientific model is NOT like the real thing?
Limitation
Yandel wants to know which kind of sneakers help him run the fastest. He tests 3 different styles of sneakers and measures his running time over 100 meters. What is his IV?
Style of sneaker
What is the term for a liquid changing state into a gas?
Evaporation
When we performed the hot water test on the cups and measured the mass before and after, why did the cup with no lid lose more mass?
The gas molecules were able to escape and therefore reduce the mass.
Daliz loves to burn candles in her home. She wants to figure out which kind of candle burns the slowest so she can save money. She tests a soy candle, a beeswax candle, and a paraffin wax candle over a 12 hour period. What is her DV?
Burn rate
If Morgan is testing how much her plants grow with different amounts of water, what would be a controlled variable?
Type of soil, amount of sunlight, time of watering, environment, etc.
Chance wants to find out which kind of yogurt is preferred by his little sister in her morning smoothies. One day he puts in greek yogurt, the next whole milk yogurt, and the next day kefir. He asks her each day to rank her smoothie on a scale of 1 to 10. What is his IV?
Kind of yogurt
In a solid, they vibrate in place. In a liquid they move and slide pretty quickly. In a gas they move rapidly and bounce around.
What are the three types of variables in every experiment?
Independent, dependent and controlled
Sophia is concerned about her older cat's weight gain. She decides to see which brand of cat food helps her best maintain a healthy weight. She tests three different brands, one per month. She records her cat's weight once per week. What is her DV?
Delonda knows that controlled variables are important to maintain to keep a test fair. If she is testing how well two different cups keep drinks cold over time, what would a controlled variable be?
Environment/location, starting temperature of water, timing of tests, amount of water/ice, etc.