Units
Speed
Vocabulary
Graphs
Vocabulary 2
100
What units (metric) are used to measure distance?
Kilometer (km), meter (m), centimeter (cm), and millimeter (mm)
100
You need two measurements to calculate speed.
distance
time
100
The measure of distance above sea level, or how high something is,
elevation
100
What is the purpose of a graph? Why do we make graphs?
makes data (information) visual
or
easy to understand the data
100
What is the change in velocity from 2 sec to 5 sec? seconds?
3m/s
200
The units for time include:
a. c.
b. d.
a. second c. hour
b. minute d. day
200
What happens to speed when the elevation goes up?
speed increases (goes up)
200
What is an formula?
math sentence using variables (letters) that will be replaced with numbers to solve the answer.
200
On a speed graph, the independent variable is ___________________
time
200
What is the definition for surface?
the outside layer; the top
300
You need to find the speed of a car traveling 300 km in 6 hours? What unit(s) are needed for the answer?
km/hr
300
What are the formulas for calculating:
speed
time
distance
s = d/t
t = d/s
d= s x t
300
Name 3 things that can affect speed?
different surfaces
friction
change in elevation
300
Define dependent variable
the variable that is being tested or measured.
Value changes depending on the independent variable.
300
How many centimeters are in 1 Meter?
100cm = 1m
400
How much time it will take to ride your bike to the store 800m at a speed of 20m/min. Use the correct units.
40m/min
400
What happen to the speed of the car when the surface was a towel?
slowed down
decreased
400
How do you find the average of these numbers:
6, 8, 10, 12, 20, 22
Add: 6 + 8 + 10 + 12 + 20 + 22 = 78
Divide 78 divide by 6 the # of addends. 78/6 =13
400
All graphs require 4 things
title
label independent variable
numbers (data)
label dependent variable
400
What is the formula for acceleration
a = change in velocity / change in time
500
How far can your little brother travel at 2.5 m/s and in 5 seconds?
12.5 meters
500
Which is faster:
A. Car travelling 100 km in 5 hours?
B. Car travelling 500 km in 10 hours?
A. 20 km/hr
B. 50 km/hr = the fastest
500
What force slows down motion by sticking to the surface (shoes, tires)
traction
500
On a speed and elevation graph, which variable was independent?
elevation
500
What is acceleration?
Acceleration is the change of velocity as time passes -- anytime we speed up or slow down, or change direction, we undergo acceleration.