Scientific Method
Is the following observation qualitative or quantitative? The plant is short.
Qualitative
97.25 cm in mm
972.5mm
Define uniform speed
Speed that stays the same; does not change
Define instantaneous speed
Speed at a specific moment in time
velocity = distance/time & direction
Students watched a cartoon either alone or with other students and then rated how funny they found the cartoon to be. Identify the independent and dependent variable.
Independent variable - who students watched the cartoon with
Dependent variable - how funny they rated the cartoon
8.26 kL in mL
8,260,000 mL
Provide an example of uniform speed
Using autopilot/ cruise control
Provide an example of instantaneous speed
Rocket is traveling at 2568 m/s at 2:37 s after takeoff
What is the equation to find average speed?
average speed = total distance/total time
What is the difference between qualitative and quantitative observations?
Quantitative - measurable numeric value
Qualitative - description of an event/characteristic
8.47 km in m
8470 m
Define non-uniform speed
Speed that changes over time
Define acceleration
Rate at which velocity changes
What is the equation for acceleration?
acceleration = (final velocity - initial velocity)/time
What is the difference between independent and dependent variables?
Independent variable - the one thing you intend to change
Dependent variable - the variable that changes as a result of the independent variable
68.2 mg in g
0.068 g
Provide an example of non-uniform speed
Driving through town, different speed limits, Walking in the halls
What are the three types of acceleration?
Increase in speed,
Decrease in speed
Change in direction
A baseball is thrown and it travels a total distance of 714 m in 17 s. What is the speed of the baseball?
42 m/s
What are the 6 steps of the scientific method?
1. make an observation
2. ask a question
3. form a hypothesis
4. experimentation/test your hypothesis
5. analysis
6. conclusion
12.5 cm in m
0.125 m
The mantis shrimp can punch with the force of a bullet, breaking open shells to find food. If the mantis shrimp can punch with a velocity of 30 m/s in .06 s, what is the acceleration of the shrimp’s punch?
500 m/s^2
The jet is cruising in the air at a velocity of 32,640 m/min. The jet prepares for landing and 24 min later, comes to a stop on the landing strip. What is the deceleration of the jet?
1360 m/s^2
The snail travels at a speed of 6 m/s for 7 s, then he travels at a speed of 10 m/s for 8 s and finishes his lap at a speed of 6 m/s for 1 s. What is the average speed of the snail?
8 m/s