IV vs DV vs Constant
Freebie!
Any questions about the differences between IV, DV, and Constants?
Questions will vary.
What state of matter has the most tightly-packed particles?
Solids
Phase change-Liquid->solid
Freezing
From where do plants directly get energy?
The sun
Identify the constants: Mr. Scott wants to find out how the amount of water given to a plant affects the plant's height. He kept the amount of sunlight and type of plant the same.
Amount of sunlight and type of plant.
What is an independent variable?
An independent variable is what the scientist changes directly in an experiment.
Why does liquid water take the shape of a cup it is poured into, but solid ice cubes do not?
Because it has an indefinite shape
What is the phase change called when liquid turns into gas?
Vaporization or evaporation
Are you excited for your science test? Anything you are still confused about?
Answers will vary
A student wanted to do an experiment to find out how increasing the speed of a car affects how much gasoline is used. What is the dependent variable in this experiment?
How much gasoline is used
What is a dependent variable?
What the scientist measures that depends on the IV in an experiment.
What state of matter's particles slide past each other?
Liquid
Is energy increasing or decreasing from liquid->gas?
Increasing
What South American country did Mr. Scott visit last summer and jump off a bridge in?
Ecuador
Mr. Scott is testing how the number of players in a game of Among Us affects how much time the game takes. What is the independent variable?
The number of players in a game of Among Us
Which of these words means the same thing as a constant?
I. Different
II. Similar
III. Same
Same
Make the three hand gestures for solid, liquid, and gas.
Must mime all three correctly with their hands.
Solid-two closed fists vibrating
Liquid-two closed fists brushing past each other
Gas-crazy fists
A cool can of soda was set on a table on a hot summer day. A student observed water vapor in the air forming water droplets on the outside of the soda can. What phase change occurred? What happened to the energy as it went from water vapor to water droplets?
Condensation, because gas cooled into a liquid. Energy decreased.
Experiment-Ms. Seiler draws a math problem on the board using a black Expo marker. Then she wipes it with an eraser. She does this three more times, all using different colors of Expo markers. She makes sure to use the same pressure when writing and the same eraser each time. She wants to see if the amount of marker left behind is determined by the color of the marker.
What are the IV, the DV, and the constants?
IV-Color of Expo marker
DV-Amount left behind
Constant-Same amount of pressure when writing and same eraser
Mr. Scott is testing how the number of players in a game of Among Us affects how much time the game takes. What is the dependent variable? Explain.
How much time the game takes. I know this because the dependent variable is what we measure, and it depends on the number of players.
Try to come up with your own experiment, then tell me the IV, DV, and Constants!
Answers will vary.
Rank solid, liquid, and gas by their amount of energy (most to least).
1. Gas
2. Liquid
3. Solid
Going from a gas to a solid, are you adding or removing energy? (Think heat.)
Explain.
Removing, because removing thermal energy (heat) makes something colder, and a gas is the warmest, then liquid, then solid.
Describe the differences between solid, liquid, and gas particles. (Think how they look, can use hand motions)
Solids have tightly-packed particles, liquids have loosely-packed particles that slide on each other, and gases have particles all over the place (or use correct hand motions).
Create a scientific question based on the following experiment:
Experiment: Mr. Scott and Ms. Hammond want to figure out if the number of students in a Zoom classroom affects the speed of their WiFi.
Must be in this format-"How does ___ affect ____?"
How does the number of students in a Zoom classroom affect the speed of Mr. Scott and Ms. Hammond's WiFi?