Vocabulary
A pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.
model
A graph must include a __________ and _________ axis.
x and y
horizontal and vertical
Is a model more complex than the thing it is representing?
No
A controlled experiment tests how many variables?
One
Jake believes Tide is a better laundry detergent than Gain. He tests what detergent will reduce the color of a coffee stain the most. The washing machine, type of coffee, material of shirt, time in the washer, and temperature of water would all be _________ .
constants
constant variables
The observations, measurements, and other types of data that people gather and test to support and evaluate scientific explanations.
empirical evidence
Name two types of graphs we discussed.
bar graph
line graph
pie chart
The hypothesis is "Lemons grown in higher temperature produce more juice those grown at a lower temperature." What tool can be used to test the dependent variable?
graduated cylinder
Jake believes Tide is a better laundry detergent than Gain. He tests what detergent will reduce the color of a coffee stain the most.
What is the dependent variable?
coffee stain color
Some teachers think that students learn best in rooms with music. They teach the same lesson, but one class plays music in the background and the other is not. They give a test and compare the results. which is the experimental group?
the class listening to music
A method that is used to study and analyze the characteristics of an actual or theoretical system.
simulation
(Not graphing, sorry)
Name two types of models
physical
conceptual
mathematical
Give a benefit of a simulation
answers may vary
Homer suddenly notices that the walls of his shower are covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to test this out by spraying half of the shower with coconut juice every day. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the amount of green slime on either side of the shower. What is the independent variable?
coconut juice
Homer suddenly notices that the walls of his shower are covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to test this out by spraying half of the shower with coconut juice every day. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the amount of green slime on either side of the shower. What is the conclusion?
Coconut juice does not get rid of green slime.
A descriptive statement or equation that reliably predicts events under certain conditions.
law
A graph must include a _______ on each axis.
label
There are many important steps when conducting a valid experiment. CHOOSE TWO steps that are most important.
A. keeping costs to a minimum
B. making accurate measurements
C. making sure to control all of the variables except for what you are testing
D. choosing a topic that has never been examined before
B and C
Homer suddenly notices that the walls of his shower are covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to test this out by spraying half of the shower with coconut juice every day. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the amount of green slime on either side of the shower. What is the dependent variable?
Amount of green slime
A scientist thinks that noodles will cook faster faster when salt is added to the water. He tests two groups of noodles, one with salt in the water and one in water with no salt. He records how fast they boil. Which is the experimental group?
The group with salt
A system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation.
theory
A graph must include a _________ to tell others what the information represents.
title
Which hypothesis is NOT testable?
A. Students who attend class have higher grades than students who skip class.
B. People exposed to high levels of ultraviolet light have a higher incidence of cancer than the norm
C. If you put people in a dark room, then they will be unable to tell when an infrared light turns on.
D. Goldfish make better pets than guinea pigs.
D
Jonathan set up the same experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.
mass of ball
1. A paint company wants to test whether a new chemical will make their paint resist fading. Which test would include an acceptable control group?
A. Use painted boards from a previous test of this type, but put new paint on top of the old paint.
B. No control group is needed because the results will be obvious.
C. Use a different type of wood for testing the new paint, but use the same paint on all of the boards.
D. Use boards painted without the chemical and treat them the same way as boards painted with the chemical.
Use boards painted without the chemical and treat them the same way as boards painted with the chemical.