Download PS 6.8.1 – 6.8.5 TEST 10

PS 6.8.1 – 6.8.5
TEST 10
8TH GRADE SCIENCE
1. MORE THAN 2000 YEARS AGO GREEKS DISCOVERED
DEPOSITS OF A MINERAL THAT WAS A NATURAL
MAGNET CALLED _______.
A. LIGNITE B. MAGTITE C. MAGNETITE D. MAGNET
2. THE PROPERTIES AND INTERACTIONS OF MAGNETS
IS CALLED _________.
A. COBALT B. MAGNETITE C. MAGNETISM D. ATTRACT
3. THIS EXERTS A FORCE ON OTHER MAGNETS AND
OBJECTS MADE OF MAGNETIC MATERIALS.
A. MAGNETIC FIELD B. MAGNETIC POLE
C. ATTRACTION D. MAGNETIC RANGE
4. WHERE THE MAGNETIC FORCE EXERTED BY THE
MAGNET IS STRONGEST.
A. MAGNETIC FIELD B. MAGNETIC FORCE
C. MAGNETIC SHIELD D. MAGNETIC POLE
5. NORTH AND SOUTH POLES OF MAGNETS ALWAYS
_______ EACHOTHER.
A. REPEL B. GO AROUND C. DOMAIN D. ATTRACT
6. 2 NORTH POLES AND 2 SOUTH POLES OF 2 MAGNETS
_________ EACHOTHER.
A. REPEL B. GO AROUND C. DOMAIN D. ATTRACT
7. WHEN 2 MAGNETS ARE BROUGHT CLOSE TO EACH
OTHER, THEIR MAGNETIC FIELDS ________TO
PRODUCE A NEW MAGNETIC FIELD.
A. COMBINE B. SPLIT C. REPRODUCE D. DIVIDE
8. THE _______ POLE OF A COMPASS POINTS IN THE
DIRECTION OF THE MAGNETIC FIELD.
A. SOUTH B. NORTH C. EAST D. WEST
9. ONLY A FEW METALS, SUCH AS IRON, ______, OR
NICKEL ARE ATTRACTED TO MAGNETS.
A. HEMATITE B. SOLENOID C. ALUM D. COBALT
10. GROUPS OF ATOMS WITH ALIGNED MAGNETIC POLES
ARE CALLED MAGNETIC __________.
A. DOMAINS B. DOMICILES C. DOMES D. BUNCHES
11. _________ HYPOTHESIZED THAT THE ELECTRIC
CURRENT MUST PRODUCE A MAGNETIC FIELD AROUND
THE WIRE, AND THE DIRECTION OF THE FIELD CHANGES
WITH THE DIRECTION OF THE CURRENT
A. VOLTA B. SHOCKLEY C. NEWTON D. OERSTED
12. A TEMPORARY MAGNET MADE BY WRAPPING A WIRE
COIL CARRYING A CURRENT AROUND AN IRON CORE.
A. MAGNETO B. ELECTROMAGNET C.ELECTRODOMAIN
13. A SINGLE WIRE WRAPPED INTO A CYLINDRICAL WIRE
COIL IS CALLED A __________.
A. ELECTROMAGNET B. DOMAIN C. SOLENOID D. CELL
14. ELECTROMAGNETS ARE TEMPORARY MAGNETS
BECAUSE THE MAGNETIC FIELD IS PRESENT ONLY
WHEN CURRENT IS FLOWING IN THE _______.
A. DOMAIN B. CELL C. CIRCUIT D. SOLENOID
15. THESE ARE DEVICES THAT USE AN ELECTROMAGNET
TO MEASURE ELECTRIC CURRENT.
A. SOLENOID
C. CELLS
B. GALVANOMETERS
D. CIRCUITMEASERS
16. A DEVICE THAT CHANGES ELECTRICAL ENERGY INTO
MECHANICAL ENERGY.
A.CIRCUIT MOTOR
C. MANUAL MOTOR
B. MECHANICAL MOTOR
D. ELECTRIC MOTOR
17. THE GENERATION OF A CURRENT BY A CHANGING
MAGNETIC FIELD IS ELECTROMAGNETIC ________.
A. INDUCTION B. CONDUCTION C. GENERATOR
18. A _______ USES ELECTROMAGNETIC INDUCTION TO
TRANSFORM MECHANICAL ENERGY INTO ELECTRICAL
ENERGY.
A. GENERATOR B. SOLENOID C. TURBINE D. CELL
19. A LARGE WHEEL THAT ROTATES WHEN PUSHED BY
WATER, WIND, OR STEAM.
A.GENERATOR B. CELL C. TURBINE D.SOLENOID
20. A BATTERY PRODUCES THIS TYPE OF CURRENT.
A.INDIRECT B. CLOSED C. ALTERNATING D. DIRECT
21. WHEN YOU PLUG YOUR CD PLAYER INTO A WALL
OUTLET, YOU ARE USING ______ CURRENT.
A. INDIRECT B. CLOSED C. ALTERNATING D. DIRECT
22. A DEVICE THAT INCREASES OR DECREASES THE
VOLTAGE OF AN ALTERNATING CURRENT.
A. ALTERNATOR
C. TURBINE
B. GENERATOR
D. TRANSFORMER
23. A TRANSFORMER THAT INCREASES THE VOLTAGE SO
THAT THE OUTPUT VOLTAGE IS GREATER THAN THE
INPUT VOLTAGE IS A _______ TRANSFORMER.
A.STEP-DOWN B. STEP-UP C. NO-STEP D. CELL
24. A TRANSFORMER THAT DECREASES THE VOLTAGE SO
THAT THE OUTPUT VOLTAGE IS LESS THAN THE INPUT
VOLTAGE IS A _______ TRANSFORMER.
A.STEP-DOWN B. STEP-UP C. NO-STEP D. CELL
25. ONE WAY TO REDUCE THE HEAT PRODUCED IN A
POWER LINE IS TO TRANSMIT THE ELECTRICAL ENERGY
AT HIGH VOLTAGES, TYPICALLY AROUND ____ VOLTS.
A. 150,000 B. 15,000 C. 500,000 D. 10,000
BONUS/ESSAY QUESTION
HOW DOES MUSICAL INFORMATION STORED ON A CD
BECOME SOUND YOU CAN HEAR?
1. MORE THAN 2000 YEARS AGO GREEKS DISCOVERED
DEPOSITS OF A MINERAL THAT WAS A NATURAL
MAGNET CALLED _______.
C. MAGNETITE
2. THE PROPERTIES AND INTERACTIONS OF MAGNETS
IS CALLED _________.
C. MAGNETISM
3. THIS EXERTS A FORCE ON OTHER MAGNETS AND
OBJECTS MADE OF MAGNETIC MATERIALS.
A. MAGNETIC FIELD
4. WHERE THE MAGNETIC FORCE EXERTED BY THE
MAGNET IS STRONGEST.
D. MAGNETIC POLE
5. NORTH AND SOUTH POLES OF MAGNETS ALWAYS
_______ EACHOTHER.
D. ATTRACT
6. 2 NORTH POLES AND 2 SOUTH POLES OF 2 MAGNETS
_________ EACHOTHER.
A. REPEL
7. WHEN 2 MAGNETS ARE BROUGHT CLOSE TO EACH
OTHER, THEIR MAGNETIC FIELDS ________TO
PRODUCE A NEW MAGNETIC FIELD.
A. COMBINE
8. THE _______ POLE OF A COMPASS POINTS IN THE
DIRECTION OF THE MAGNETIC FIELD.
B. NORTH
9. ONLY A FEW METALS, SUCH AS IRON, ______, OR
NICKEL ARE ATTRACTED TO MAGNETS.
D. COBALT
10. GROUPS OF ATOMS WITH ALIGNED MAGNETIC POLES
ARE CALLED MAGNETIC __________.
A. DOMAINS
11. _________ HYPOTHESIZED THAT THE ELECTRIC
CURRENT MUST PRODUCE A MAGNETIC FIELD AROUND
THE WIRE, AND THE DIRECTION OF THE FIELD CHANGES
WITH THE DIRECTION OF THE CURRENT
D. OERSTED
12. A TEMPORARY MAGNET MADE BY WRAPPING A WIRE
COIL CARRYING A CURRENT AROUND AN IRON CORE.
B. ELECTROMAGNET
13. A SINGLE WIRE WRAPPED INTO A CYLINDRICAL WIRE
COIL IS CALLED A __________.
C. SOLENOID
14. ELECTROMAGNETS ARE TEMPORARY MAGNETS
BECAUSE THE MAGNETIC FIELD IS PRESENT ONLY
WHEN CURRENT IS FLOWING IN THE _______.
D. SOLENOID
15. THESE ARE DEVICES THAT USE AN ELECTROMAGNET
TO MEASURE ELECTRIC CURRENT.
B. GALVANOMETERS
16. A DEVICE THAT CHANGES ELECTRICAL ENERGY INTO
MECHANICAL ENERGY.
D. ELECTRIC MOTOR
17. THE GENERATION OF A CURRENT BY A CHANGING
MAGNETIC FIELD IS ELECTROMAGNETIC ________.
A. INDUCTION
18. A _______ USES ELECTROMAGNETIC INDUCTION TO
TRANSFORM MECHANICAL ENERGY INTO ELECTRICAL
ENERGY.
A. GENERATOR
19. A LARGE WHEEL THAT ROTATES WHEN PUSHED BY
WATER, WIND, OR STEAM.
C. TURBINE
20. A BATTERY PRODUCES THIS TYPE OF CURRENT.
C. D. DIRECT
21. WHEN YOU PLUG YOUR CD PLAYER INTO A WALL
OUTLET, YOU ARE USING ______ CURRENT.
C. ALTERNATING
22. A DEVICE THAT INCREASES OR DECREASES THE
VOLTAGE OF AN ALTERNATING CURRENT.
D. TRANSFORMER
23. A TRANSFORMER THAT INCREASES THE VOLTAGE SO
THAT THE OUTPUT VOLTAGE IS GREATER THAN THE
INPUT VOLTAGE IS A _______ TRANSFORMER.
B. STEP-UP
24. A TRANSFORMER THAT DECREASES THE VOLTAGE SO
THAT THE OUTPUT VOLTAGE IS LESS THAN THE INPUT
VOLTAGE IS A _______ TRANSFORMER.
A.STEP-DOWN
25. ONE WAY TO REDUCE THE HEAT PRODUCED IN A
POWER LINE IS TO TRANSMIT THE ELECTRICAL ENERGY
AT HIGH VOLTAGES, TYPICALLY AROUND ____ VOLTS.
A. 150,000
BONUS/ESSAY QUESTION
HOW DOES MUSICAL INFORMATION STORED ON A CD
BECOME SOUND YOU CAN HEAR?