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Worksheets2023 Fall Sem Review #3
Total questions: 69
Worksheet time: 51mins
All permanent magnets have two
magnetic charges
magnetic fields
magnetic needles
magnetic poles
Like poles on a permanent magnet will
attract each other
repel each other
always interact
point in the same direction
The magnetic field lines around a bar magnet
are perfectly straight
are only perpendicular to the magnet
spread out from one pole and curve around to the other
cross back and forth over one another
Which poles on the earth change?
the North and South
the magnetic poles
the geographic poles
the telephone poles
What is known as the difference between the earth's magnetic pole and its geographic pole?
magnetic declination
magnetic difference
geographic decline
geographic increase
As earth's magnetic poles move what happens to the magnetic declination of a given location
it will always remain constant
it will return to zero
it will change
it will always double
Electric currents passing through wires will produce a(n)
solenoid
magnet
magnetic field
insulator
What makes an electromagnet different than a permanent magnet.....select all that apply
it can be turned on and off
it does not need any electricity
its strength can be increased and decreased
its polarity can be reversed
Which way will NOT increase the strength of the magnetic field of an electromagent
increasing the current
using a stronger ferromagnetic core
winding the coils closer together
decreasing the number of loops
What type of materials are needed to create an electromagnet?
battery, light bulb, plastic straw
battery, coil of wire, iron core
generator, iron core, switch
switch, source of electricity, compass
Moving a permanent magnet through a coil of wire will
demagnetize the magnet
the wire will become an electromagnet
the magnet will become electrified
a current will be generated in the wire
What type of current is produced in a battery
induced
magnetic
alternating
direct
When current running through a wire is placed in the field of a permanent magnet,
solar energy is transformed into light
electrical energy is transformed into sound
solar energy is transformed into mechanical energy
electrical energy is transformed into mechanical energy
What type of equipment is used to measure the current induced when a wire passes through a magnetic field?
a transformer
a galvanometer
a generator
an insulated wire
What do electric generators do
transform mechanical energy to electrical energy
transform mechanical energy to sound
transform electrical energy to mechanical energy
transform electrical energy to potential energy
To reverse current direction in a motor the conducted current goes
through the commutator to the armature
through the armature
through the brushes to the commutator
in the direction of rotation
A plant generating electric current
transmits alternating current at high voltages, but is used at low voltages
transmits direct current at high voltages, but is used at low voltages
transmits alternating current at low voltages, but used at high voltages
transmits direct current at low voltages, but used at high voltages
What type of device converts mechanical energy into electrical energy?
solenoid
electric motor
transformer
generator
What type of device converts electrical energy into mechanical energy
electric motors
generator
transformers
galvanometer
What type of device can increase and decrease voltage?
Generators
Transformers
Galvanometers
Electric motors
In order to determine an object’s location, you need a _____.
reference point
displacement
speed
Time
Motion can be described through a change in _____.
speed
time
position
distance
To determine if an object has changed position, you need to know its position relative to another object. _______________
True
False
Should you choose a reference point that moves. Example a bird.
Yes
No
Distance, a reference point, and a reference are all needed to determine the position of an object.
(a)
A train traveled 250 kilometers (km) from its starting point in 5 hours (h). If the train continues at the same average speed for another 4 hours, how far will it have traveled from its starting point?
350 km
250 km
450 km
550 km
7) If you ride your bike around the block, returning to the exact point where you started, your displacement is (a) m?
An object is _____ if its position changes.
in motion
at reset
a frame of reference
magical
where is the Ball ?
on the table
under the table
in the table
where is the Apple ?
on the Book
Next to the book
in the Book
The runners move forward in a ..........................
round and round motion
zig- zag motion
straight line motion
back and forth motion
A swing moves ..........................
straight line
back and forth
round and round
zig zag
Unit of Distance
Litres
Tonnes
Kilogram
Kilometers
Unit of Speed
Kilogram
Litre
Meter
Kilometer / Hour
Which tool measures distance?
Meter stick
Stop watch
Pan balance
Thermometer
Displacement is the difference between your
reference point and reference direction
total distance traveled
starting position and your final position
average speed
You ride your bike 10 miles East but then head West for 6 miles. What is your displacement?
16 miles East
4 miles East
4 mile West
6 miles West
Suppose you travel 10 miles East on your bike from your house and then 6 miles West. If the reference direction is East, then what is final position relative to your house?
+4 miles
-4 miles
+16 miles
-6 miles
An object's location or _______________ is the distance from a reference point.
distance
position
acceleration
displacement
Which line on the graph represents the fastest constant speed?
A
B
C
They are all moving at the same speed.
The hardened remains of a living thing that died long ago.
fossil
extinct
endangered
minerals
Why are there more animal fossils than plant fossils?
Animals are smaller than plants.
Plants have harder bodies than animals.
Plans have softer bodies than animals.
Animals eat plants.
Which is an imprint fossil?
bone
a cast
a trace fossil
original remains
Which type of rock are most fossils found?
sedimentary rock
metamorphic rock
igneous rock
fossils
If a scientist found a fish fossil in the desert, what can they infer?
An animal ate the fish.
The water covered the area long ago.
Today's fish looks the same
The fish is endangered.
What replaces the wood of a once-living thing to form petrified wood?
amber
cast
mold
minerals
This type of fossil is tree sap hardened and replaced by minerals.
Petrified wood
Imprint
Amber
Mold
What type of fossil is pictured here?
Mold fossil
Trace fossil
Cast fossil
Body fossil
What type of fossil is pictured here?
Forest fossil
Trace fossil
Cast fossil
Body fossil
What type of fossil is pictured here?
Mold fossil
Trace fossil
Cast fossil
Body fossil
Which organism is most likely to become fossilized in the next million years?
a butterfly
a giraffe
an octopus
an earthworm
Which type of fossil preservation is a thin carbon silhouette of the original organism?
cast
carbon film
mold
petrified
A fossil formed when minerals replace all or part of an organism is called a
mold
petrified fossil
cast
trace fossil
What is a copy of a fossil produced by filling a mold with sediments or crystals?
mold
cast
petrified fossil
carbon film
The hardened remains of a living thing that died long ago.
fossil
extinct
endangered
minerals
Why are there more animal fossils than plant fossils?
Animals are smaller than plants.
Plants have harder bodies than animals.
Plans have softer bodies than animals.
Animals eat plants.
Which is an imprint fossil?
bone
a cast
a trace fossil
original remains
Which type of rock are most fossils found?
sedimentary rock
metamorphic rock
igneous rock
fossils
If a scientist found a fish fossil in the desert, what can they infer?
An animal ate the fish.
The water covered the area long ago.
Today's fish looks the same
The fish is endangered.
What replaces the wood of a once-living thing to form petrified wood?
amber
cast
mold
minerals
This type of fossil is tree sap hardened and replaced by minerals.
Petrified wood
Imprint
Amber
Mold
What type of fossil is pictured here?
Mold fossil
Trace fossil
Cast fossil
Body fossil
What type of fossil is pictured here?
Forest fossil
Trace fossil
Cast fossil
Body fossil
What type of fossil is pictured here?
Mold fossil
Trace fossil
Cast fossil
Body fossil
Which organism is most likely to become fossilized in the next million years?
a butterfly
a giraffe
an octopus
an earthworm
Which type of fossil preservation is a thin carbon silhouette of the original organism?
cast
carbon film
mold
petrified
A fossil formed when minerals replace all or part of an organism is called a
mold
petrified fossil
cast
trace fossil
What is a copy of a fossil produced by filling a mold with sediments or crystals?
mold
cast
petrified fossil
carbon film
