Welding
Construction and Stuff
Automotive
Terms
Random Things
100
Which metal is more reactive?
Potassium or Lithium
Potassium
100
Question, Research, Hypothesis, Experiment, Analysis and Conclusion is all steps in the ________ ________
Scientific method
100
Which gear has a faster RPM?
Gear A with a radius of 4 cm
Gear B with a radius of 7 cm
Gear C with a radius of 2 cm
Gear C because it has the smallest radius
100
This term that describes a metal's flexibility, how much is can bend but not break
Ductilibility
100
What is this chart missing?
Position vs. Time of a Free Fall
X-axis scale and/or label
200
An ______ is a metal made by combining two or more metallic elements to give it extra strength or resistance to corrosion
Alloy
200
Name at least two steps in the technological design process
Define the Problem
Brainstorm the Solution
Determine Constraints
Build
Test
Evaluation
200
Name the 4-steps in a 4-stroke engine in the order they occur
Intake
Compression
Power
Exhaust
200
A term describing the temperature at which a given solid will melt
Melting point
200
Name a factor that influences welding
The amount of each metal used
The amount of heat applied to the metals
3. The chemical properties of each metal
300
Which two types of metals has the lowest tensile strength based on this picture:
Low carbon steel and Cast Irons
300
In the water tower building activity, name at least two constraints you had to work around
Limited budget
Limited supplies
Limited time
300
Name two changes that can increase Horsepower if the distance is kept the same
Increase force
Decrease time (how fast something goes)
HP = (Force*Distance)/ time
300
The resistance of a material to breaking when two opposing forces are applied in the same plane - think tug-of-war
Tensile Strength
300
Torque = Force * Distance
Calculate the Radius of a gear if it exerts 20lbs of force and the final Torque is 360Ft-Lbs.
18 feet
Torque = Force * Distance
360Ft-Lbs = 20lbs*x
x= 360Ft-lbs/20lbs = 18 feet
400
How many neutrons are in this element:
5
(Atomic mass - Atomic number) = Neutrons
400
Fill in the blanks:
Science is based on experimentation to answer a ______ while Technological Design solves a _______
Question; Problem
400
Order the following based on their flash points from lowest to highest:
Diesel, Gasoline mixed with oil, Gasoline
Gasoline (lowest) --> Gas/oil --> Diesel (highest)
400
A noble gas is inert .... what does inert mean?
It does not react with any other substances and is stable
400
DAILY DOUBLE!
Name three noble gases.
Argon, Helium, Xenon, Neon, Radon, Krypton
500
The following lattice structures are in three types of metals. Based on the structures below, name the types of metals
Pure Metal
Interstitial alloy
Substitutional alloy
500
What are the independent and dependent variables in the following scientific experiment?
Dr. Nielsen wants to know if she can get more kernels of corn per ear if she uses extra water. She has two fields of corn, one that gets the regular, normal amount of water, and a second field that gets twice as much. At the end of the harvest season she counts of number of ears and kernels on each ear for each field.
Independent - amount of water
Dependent - number of kernels per ear of corn
500
HP = (Force*Distance)/ Time
HP*time / Force = D
3*20/2
Calculate the distance a football player ran if the player has a Horsepower of 3Nm and exerted 2N of force in 20 seconds.
30 meters
HP = (Force*Distance)/ Time
HP*time / Force = Distance
(3Nm*20Sec)/2N = 30 meters
500
A term meaning the ability of a material to resist being fractured (breaking) by opposing forces of a straight line but not in the same plane.
Sheer Strength
500
Boyle's law is:
Initial Pressure*Initial Volume = Final Pressure*Final Volume (also written as P1V1= P2V2).
Based on this law, if volume increases, what happens to the pressure?
It decreases