Transcript Category 2 Jeopardy Review

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IS
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Earth’s
Movement/
Genetics
Miscellane
ous
Force
Work
Energy
Speed/Velocity
100
100
100
100
100
100
200
200
200
200
200
200
300
300
300
300
300
300
400
400
400
400
400
400
500
500
500
500
500
500
Two cars with different masses travel at the
same speed down a hill toward a stop sign.
What will happen when both cars apply
brakes at the same time to stop?
F. The car with the smaller mass will require less
force to stop than the car with the larger mass
G. The car with the larger mass will maintain its
velocity while traveling down the hill.
H. The car with the smaller mass will take longer to
Stop than the car with the larger mass.
J. The car with the larger mass will have less inertia
than the car with the smaller mass.
A 100
F = ma
The smaller the mass, the
faster it can stop
A 100
Four students raced toy cars on a track. The mass
and the acceleration of each car is recorded in the
table below.
Which toy car had the greatest applied
force?
A 200
Work all problems:
1 = .19 x 2 = .38N
2 = .15 x 3 = .45 N
3 = .25 x 1.5 = .375 N
4 = .21 x 2.5 = .53 N
A 200
An object will continue moving in a straight line
unless it is acted on by an unbalanced force.
Which of the following best explains Earth’s
motion?
A. There is no unbalanced force acting on Earth
because space is empty and nothing touches
Earth.
B. The gravitational force pulling Earth toward the
sun is equal and opposite to the force pulling
the sun toward Earth, so there is no unbalanced
force acting on Earth.
C. The sun moves in an elliptical orbit around
Earth, and the sun’s gravity pulls Earth along.
D. Earth moves in an elliptical orbit around the
sun because the gravitational force of the sun
attracts Earth.
A 300
D
The Earth would move in a
straight line through space if
the sun’s gravity did not keep
it in orbit.
A 300
Some students measure the acceleration of a
wheeled cart being acted on by varying forces. The
students record their data in the table shown above.
According to the data table, how much force is
acting on the cart when the students measure an
acceleration of 2.6 m/s2? (find the mass from the
given data, then find the force for the last one.)
A 400
m = f/a
M = 5/1 = 5 grams
F = ma = 5 x 2.6 = 13
A 400
Sometimes tectonic plates do not move easily
past one another, and the plates become stuck.
Forces build up, and when the plates finally
move, tension is released, as shown above.
The sudden movement of the plates is caused
by:
* The mass of the plates
* the weight of the plates
• Unbalanced forces
• Gravitational forces
A 500
Unbalanced forces
A 500
Which of the following is considered to
be work?
• A body builder lifts 350 pounds
above his head.
• A mother carries her baby from
room to room.
• A woman carries a 20 km grocery
bag to her car?
• A body builder holds 350 pounds
over his head for 5 minutes
B 100
A body builder LIFTS 350 lbs over his
head.
Work is moving a FORCE through a
DISTANCE. When he holds it over
his head, he is not moving it through a
distance.
B 100
Calculate: If a man
pushes a concrete block
10 meters with a force
of 20 N, how much
work has he done?
B 200
W=fxd
= 20 N x 10 m
= 200 Newton-meters (Joules)
B 200
The diagram shows a
boat moving NORTH in
a river at 3m/s while
the current in the river
moves SOUTH at 1
m/s.
How will the boat be
affected if it enters a
part of the river where
the current is moving
south at 2 m/s?
*
*
*
*
The
The
The
The
boat
boat
boat
boat
will
will
will
will
move slower
move faster
stop
move to the west
B 300
This is a simple force problem
3 m/s North minus 2 m/s South
(subtract forces going in opposite
directions) equals 1 m/s North. The
boat will be moving slower than it
was before, when it was moving
North at 2 m/s (3m/s N – 1 m/s S = 2
m/s N)
B 300
Which of the following situations shows work
being done?
A. Student sitting in chair holding both boxes
B. Student holding the large box 1 m above the
floor
C. Student standing and holding the small box.
D. Student lifting the small box 0.5 m from the
floor to a table.
B 400
.5 m x 1.3N = .65 N-m
(Joules)
Work is done only in D.
None of the others move
a force through a
distance.
B 400
Which best explains the student’s data?
F. The speed of the cart DECREASES as the cart
rolls down the ramp because of FRICTION
between the cart and the ramp.
G. The speed of the cart INCREASES as the cart
rolls down the ramp because the force acting
on the cart is GREATER than the force of
GRAVITY.
H. The speed of the cart INCREASES as the cart
rolls down the ramp because the forces acting
on the cart are UNBALANCED.
B 500
H.
The speed of the cart
INCREASES as the cart rolls
down the ramp because the
forces acting on the cart are
UNBALANCED.
The force pulling the cart down
the ramp IS gravity, not a force
GREATER than gravity, as in
answer G.
The cart is clearly INCREASING
speed, not DECREASING, as in F.
B 500
In the classroom demonstration shown below, a rubber ball is
dropped from position 1. The ball bounces as shown. At which
position does the ball have
both the greatest potential
energy and the least
kinetic energy?
.
Position 1
Position 2
Position 3
Position 4
C 100
Position 1.
Potential energy is stored
energy; Kinetic energy is
energy of motion. The ball
will fall farthest and pick up
most acceleration from
position 1
C 100
What do we call energy
sources that cannot be
replaced, such as oil, coal,
gas, and other fossil fuels?
C 200
Non Renewable Resource
C 200
The burning of fossil fuels
empties a lot of this gas into
the atmosphere.
C 300
A
C 300
DAILY
Place A Wager
DOUBLE
C 400
C 400
D
Propane is a potential energy. It is a
chemical which can be turned into heat
(thermal energy) by burning;
the mechanical energy is the sum of
potential energy and kinetic energy. It is the
energy associated with the motion and
position of an object; the balloon rises,
turning the potential energy into kinetic
energy, thus, mechanical energy.
C 400
Why does Earth get more energy from
the sun than from all the other stars in
the universe combined?
A. The sun is much larger than the other
stars
B. The sun is much hotter than the other
stars
C. The sun is much more dense than the
other stars
D. The sun is much closer than the other
stars
C 500
D
The sun is our closest
star. It is the only one
close enough to receive
heat energy from.
C 500
A car travels at a constant speed of 15 m/s for 2
minutes. The car increases its speed from 15 to
25 m/s during the next minute and then travels
at a constant speed of 25 m/s for 2 more
minutes. Which of the following graphs best
represents the car’s motion during this 5-minute
period?
D 100
Draw it out!
F
D 100
A student walks 2 km in 30
minutes. What is the student’s
average speed in km/h?
D 200
30 minutes = .5 hour
Watch your units!!!
4 km/hour
D 200
The 3 vehicles shown are all traveling at
a speed of 15 m/s, but only the pickup
truck has a changing velocity.
The pickup truck has a changing velocity
because it: A. can accelerate faster than
the other two vehicles
B. Is traveling in the opposite direction
from the other two vehicles
C. Is traveling on a curve in the road
D. Needs a large amount of force to move
D 300
C
An object accelerates
when it SPEEDS UP,
SLOWS DOWN, or
CHANGES DIRECTION.
The truck is going
through a curve—
changing direction.
D 300
What is the speed (per
hour) of a car traveling 144
km in 90 minutes?
________________ km/h
D 400
Km/hour:
How many hours are in 90
minutes? There are 60
minutes in 1 hour;
therefore 90 minutes
equals 1.5 hours
144 km = 96 km/h
1.5 hours
D 400
Distance (meters)
125
85
50
65
100
65
20
0
Time (seconds)
What is the average
speed of the bass boat?
D 500
S = D/T
125m divided by 10
seconds = 12.5 m/s
D 500
Earth would not have seasons if it:
A. No longer tilted on its axis
B. Stopped rotating on its axis
C. Took an additional month to orbit the
sun
D.Revolved around the sun in the
opposite direction
E 100
A.
Earth’s seasons are
caused by 2 factors:
the tilt on its axis and its
revolution around the
sun.
E 100
This is a trait that seems to
disappear and only shows up
if received from BOTH
parents.
E 200
Recessive Trait
E 200
G=Tall
g=short
If there were 300 offspring,
how many would be tall?
E 300
225
E 300
What is the following:
TT
Homozygous recessive
Heterozygous
Homozygous dominant
E 400
Homozygous
Dominant
Both are capital –
dominant
Both are the same homozygous
E 400
What is the ratio of offspring
that will end up with a
homozygous recessive trait?
E 500
1:4 (same as 25%)
Three boxes have at least one
capital letter—those will
exhibit dominant traits.
One box has two lower case
letters – homozygous
recessive
E 500
A student builds a model based on this diagram.
The student uses foam balls to represent the Earth
and the moon and a flashlight to represent the
Sun. From which position should the student
shine the flashlight?
F 100
The new moon is always
between the Earth and the
Sun. Position 4
F 100
A student keeps a record of the
phases of the moon for one month
(like you all did!!) On the first night
of the student’s observations, the
full moon is visible in the sky. After
the full moon, which of these
phases will the student observe
next?
* Waxing crescent moon
• Waxing gibbous moon
• Waning crescent moon
• Waning gibbous moon
F 200
Waning gibbous moon
F 200
The heat trapping feature of
our atmosphere is called the
what?
F 300
Greenhouse effect
F 300
Which topographic map fits the picture most
correctly?of weather
This is a pattern
that occurs in a particular area
over many years.
F 400
A – the steeper slope on
the left has contour lines
that are close together;
the gently sloping bank
on the right has widely
spread contour lines.
F 400
In the above picture, primary succession occurs
when the
a. Grasses begin to grow on the newly formed island
b. Woody plants begin to grow, following the growth
of grasses
c. Woody plants begin to grow on the newly formed
island
d. Grasses begin to grow, following the growth of
woody plants
F 500
grasses
F 500
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