What is a long chain molecule made of many repeating smaller molecules called monomers.
100
The one variable that is deliberately CHANGED or varied, in an experiment.
What is the IV, Independent Variable.
100
Heat is defined as the transfer of ______________energy from one object to another.
What is "thermal"?
100
The three main events of the water cycle ending in -ation.
What are: evaporation, condensation and precipitation
100
What are the two main types of cells? HINT: depends on whether or not it contains a nucleus.
What are eukaryotes and prokaryotes?
200
The characteristics, or properties, of a particular type of plastic depends on ______________________________.
What is "how the atoms are arranged, or molecular structure".
200
The main "affected" variable that is MEASURED.
What is the DV, or dependent variable?
200
The scientifically correct definition of Temperature.
What is "average kinetic energy"?
200
The source of energy that drives the rock cycle, earthquakes and volcanoes.
What is radioactive energy from Earth's Core.
200
The center of the cell where DNA is located.
What is the nucleus.
300
A group of students test three different brands of plastic bags for tensile strength (ability to resist pulling).
If they change the type of plastic as their IV, then what should they measure (what is their DV), and how could they measure it?
Dependent variable is tensile strength, they could:
measure the time it takes to pull the bag to the breaking point,
the length that each bag stretches before breaking,
the maximum weight each bag can hold before breaking, etc.
300
All other variables (other than the IV and DV) in an experiment that must be kept the same.
What are the Controlled Variables?
300
Three ways that heat energy is transferred.
What are: Radiation, Convection and Conduction.
300
Nitrifying and de-nitrifying bacteria in the soil, urine, ammonia, fertilizers, plants and nitrogen in the air, have important roles in this earth cycle.
What is the Nitrogen Cycle?
300
"Phospholipid bilayer " refers to this part of the cell.
What is the cell membrane.
400
Name 3 examples of natural polymers.
What are: silk, cotton, wood, cellulose, carbohydrates, DNA, proteins, or any other acceptable answer (teacher decides).
400
The test group that receives "normal" treatment or no treatment, as a comparison.
What is the Control Group?
400
As energy is added to matter, what happens to the molecules, in terms of motion?
What is movement of molecules increase, or they spread out.
400
These two chemical reactions are the reverse of each other. They are both key reactions of the Carbon cycle, and without them, there would be no life on earth.
What are photosynthesis and respiration?
400
Three major cell components, that plant cells have but animal cells do not.
What are: chloroplasts, vacuoles, and cell wall
500
Name 3 examples of synthetic (man-made) polymers.
What are: polyester, polyacrylamide, nylon, plastic, teflon, kevlar, polyvinyl chloride (PVC pipes), polypropylene, polyethylene, and other acceptable answers.
500
The IV and DV in the following experiment:
A researcher wants to study effect of hours of sleep on test scores in college students. He groups the students into four groups. Each group recieves either 1,3,5 or 7 hours of sleep each night for one week. All students are then asked at the end of the week to take a test. Scores are calculated and recorded.
Independent variable is hours of sleep (1,3,5,7)
Dependent variable is test score.
500
Materials that transfer heat well and materials that do not transfer heat well.
What are conductors and insulators (in that order)
500
The name of this reaction:
Fossil Fuel + O2 ----------------> CO2 + H2O
What is Combustion?
500
These tiny organelles look like little dots that cover the ER. They are extremly important because they make proteins for the cell.