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8th Grade Unit 6 Energy And Matter
Test Description: Energy and matter
Instructions: Answer all questions to get your test result.
1) Slicing a piece of bread is considered a ____ change, while toasting a piece of bread is a _____ change.
A
chemical; physical
B
chemical; chemical
C
physical; radiant
D
physical; chemical
2) Atoms are composed of _______, ________, and _______.
A
photons; energy; chemicals
B
compounds; chemicals; elements
C
protons; neutrons; electrons
D
elements; compounds; protons
3) A stretched rubber band has __________ energy
A
chemical potential
B
elastic potential
C
gravitational potential
D
probable lunch detention
4) Thermal energy transferred by objects that are touching is called
A
potential energy
B
convection
C
radiation
D
conduction
5) Thermal energy that is transferred via electromagnetic waves is called
A
conduction
B
convection currents
C
convection
D
radiation
6) Thermal energy which is transferred in fluids such as air and water is called
A
swimming
B
conduction
C
convection
D
radiation
7) The process in which the nuclei of atoms are split, releasing enormous amounts of energy is called
A
nuclear metal
B
nuclear fission
C
nuclear fusion
D
heavy metal
8) A black car and a white car are parked in the same lot on a summer day. Which one will absorb more energy?
A
neither
B
black
C
white
D
both
9) The law of conservation of energy states that energy cannot be _________ or ____________, it can only ____________.
A
change forms, created, destroyed
B
created, destroyed, change forms
10) An ________ reaction absorbs heat, where an _________ reaction releases heat.
A
exothermic, endothermic
B
radiant, potential
C
endothermic, exothermic
D
endothermic, radiant
*select an answer for all questions
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