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8th Grade 2nd 9weeks Exam Pt. 1
Test Description: 2nd Term Exam Review Pt. 1
Instructions: Answer all questions to get your test result.
1) The electromagnetic waves with the highest energy and frequency are ____________.
A
radio waves
B
gamma rays
C
visible light waves
D
microwaves
2) If the frequency of a sound wave is 7.0 Hz, and the sound wave travels through the air at a speed of 350 m/s, what is the wavelength?
A
0.02 m
B
343 m
C
2,450 m
D
50 m
3) In the eighteenth century, a Swedish scientist devised a scale of measurement in which 0 represented the freezing point of water and 100 represented the boiling point of water. What scale of measurement did the scientist develop?
A
Absolute
B
Fahrenheit
C
Celsius
D
Kelvin
4) When a pot of water is put on a stove, the water at the top gets hot primarily by __________.?
A
radiation
B
convection
C
condensation
D
conduction
5) Tim placed a cup of ice cubes on the table. The temp. in the cup was 0 degrees Celsius. Thirty minutes later, the cup contained water and smaller ice cubes at a temperature of 4В°C. Which BEST describes the energy transfer?
A
Air transferred heat to the ice.
B
Ice transferred heat to the glass.
C
The glass transferred heat to the table.
D
The water transferred heat to the air.
6) Examples: Ice melting in a person's hand, pot boiling on stove, coffee being brewed. Which process is taking place in all three examples?
A
Radiation
B
forced convection
C
convection
D
conduction
7) In the muscle cells in your body, ____________________energy is transformed into ________________.
A
kinetic, potential
B
chemical, kinetic
C
chemical, potential
D
electrical, chemical
8) A blimp flying above the Super Bowl has the following types of energy.
A
potential and radiant
B
kinetic and electrical
C
kinetic and potential
D
kinetic and chemical
9) Which of the following energy resources are NOT considered to be renewable?
A
geothermal energy
B
wind energy
C
solar energy
D
fossil fuels
10) Jack turned on a radio station and listened to music. How does the radio change waves and energy so Jack can hear the music?
A
Sound waves are changed into electromagnetic waves.
B
Electromagnetic waves are changed into sound waves.
C
Electromagnetic waves are changed into the chemical energy in batteries.
D
Sound waves are changed into the chemical energy in batteries.
*select an answer for all questions
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