Daily Warm-Ups
Sept. 28
What is the density of a wood block with a mass of 57 g and a volume of 125
cm3?
Sept. 30
1. Using one or more of your senses to gather information is called
a) classifying
b) inquiry
c) observing
2. Making a forecast of what will happen is called
a) predicting
b) inferring
c) classifying
Oct. 2
1. What is a possible explanation for a set of observations?
a) variable
b) operational definition
c) hypothesis
2. A factor that can be measured in an experiment is called a
a) prediction
b) parameter
c) theory
Oct. 5
1. The one variable that is purposely changed to test a hypothesis is called
a (an)
a) responding variable
b) operational variable
c) manipulated variable
2. SI units of measurement are based on multiples of
a) 5
b) 10
c) 50
Oct. 14
1. The length of a path between two points is called
a) distance
b) velocity
c) speed
2. An object is in motion if it is moving relative to a
_________________ _______________.
Oct. 15
An object moves 3 cm. to the right, then 6 cm. to the left, then 8 cm. to the
right. What is the object's final displacement from its origin?
Oct. 16
What is the velocity of a plane that traveled 1800 miles from St. Louis, MO
to Los Angeles, CA in 3 hours?
Oct. 19
A snail is crossing the sidewalk at a speed of 0.5 cm/s. How long will it
take the snail to travel 1.5 m across the sidewalk?
Oct. 20
1. The formula for speed is
a) distance divided by time
b) distance + time
c) distance x time
2. A rider finishes a 10 km bicycle trip in 2 hours. The average speed of
the rider is
a) 20 km/hr
b) 10 km/hr
c) 5 km/hr
Oct. 21
A train's average speed for a 200 mile trip was 50 mi/hr. For the first 100
miles, the train traveled at 60 mi/hr. What was the approximate speed for
the last 100 miles of the trip?
Oct. 22
1. A velocity tells
a) only speed
b) only direction
c) speed and direction
2. You can calculate the slope of a graph line by
a) dividing the rise by the run
b) multiplying the rise by the run
c) dividing the run by the rise
Oct. 29
Refer to the graph on p.354 of the text and sketch the graph on p.26 of your
Interactive Notebook.
1. The graph shows the motion of a cyclist. Is the cyclist moving at a
constant speed or accelerating? Explain.
2. What would a speed-versus-time graph look like for a cyclist who is
slowing down?
a) The graph line would appear more steep.
b) The graph line would appear less steep.
c) The graph line would fall rather than rise.
d) The graph line would be horizontal.
Oct. 30
1. A softball pitcher throws a fastball, and the batter sends it flying
toward the outfield at the same speed. Did the ball's velocity change?
Explain.
2. The velocity of a baseball moving in a straight line changes from 0 m/s
to 20 m/s in 2 s. What is the acceleration of the ball?
a) 2 m/s/s
b) 10 m/s/s
c) 20 m/s/s
d) 40 m/s/s
Nov. 3
A bus traveling at 20 m/s speeds up to 30 m/s over a period of 5 seconds.
What is the aceleration of the bus?
Nov. 4
1. To find an object's acceleration, you need to know its starting speed, its
ending speed, and
a) velocity
b) time
c) distance
2. You can calculate an object's gravitational potential energy by
a) multiplying its weight times its height
b) dividing its weight by its height
c) multiplying its mass times its speed
Nov. 10
You exert a force of 120 N on a desk. Your friend exerts a force of 150 N in
the same direction. What net force do you and your friend exert on the desk?
(Draw the force vectors)
What happens if the forces are in opposite directions?
(Draw the force vectors)
Nov. 12
1. A force is described by
a) its strength only
b) its direction only
c) its strength and direction
2. What is the SI unit for force?
a) meter
b) meters per second
c) newton
