When you collect data using words and descriptions, your data is considered....
Qualitative
100
to turn or change direction
veer
100
you put oil on the wheels of your skateboard because they are sticking. When you add oil to reduce friction you are using ____
lubrication
100
Give an example of when friction is good.
walking, running, playing sports, gripping something, tires on an icy road...
200
You use video game scores to decide which of your friends is the best gamer. You are using _____ data
quantitative
200
a location or object that you use for comparison to determine if or how an object is moving
reference point
200
A rocket ship speeds up as it moves through our atmosphere. This speed can be described as..
positive acceleration
200
Where does friction exist?
between all surfaces that are in contact
300
you want to measure how far your car coasts down a ramp. Why is it important to keep everything in your test the same each time?
so you can accurately compare and analyze your data, and draw conclusions. Differences in how you do the test can affect how far your car goes.
300
a change over time in the speed, direction, or speed and direction of motion
acceleration
300
the axle-bearing-wheel part of a car can be considered a ____
subsystem
300
why is there more friction between a heavy object on the floor than a light object on the floor?
because the force pressing the heavy object to the floor is greater
400
A student writes a procedure for a science experiment and performs that procedure 4 times. This is called doing multiple _______
trials
400
the force that resists motion
friction
400
What did we use as reference points when we measured how far and straight our cars coasted?
the bottom of the ramp, the center line, the starting line, finish line
400
Which surface has more friction? A tile floor or a carpeted floor? why?
carpeted floor because it is rougher
500
the set of data used to help compare and analyze the effects of changes in a design is called
the baseline
500
a set of parts so related that they work together as a whole
system
500
A car is making a right turn at a constant speed of 5 mph. Is it accelerating?
yes
500
what are ways of reducing friction?
preventing surfaces from coming into contact, decreasing the force pressing the surfaces together, changing the substances that come in contact, adding lubrication