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7th Grade 2nd Term Exam - Pt. 2
Test Description: 2nd term cummulative exam questions
Instructions: Answer all questions to get your test result.
1) A racing car has a mass of 1000 kg. It undergoes an acceleration of 4.00 m/s2. What is the net force acting on the car?
A
4000 N
B
250 N
C
3000 N
D
776 N
2) The force that opposes motion is ______________.
A
an accelerating force
B
a balanced force
C
friction
D
an unbalanced force
3) A planet is discovered that is the same size as Earth and has the same gravitational acceleration, but has twice the mass. If you weigh 700 N on Earth, on the new planet you would weigh ____.
A
2,800 N
B
350 N
C
1,400 N
D
700 N
4) Magnets and gravity are example of ____________ forces.
A
friction
B
contact
C
rolling
D
non-contact
5) When two birds are pulling on a worm and the worm moves toward the first bird, you know that the forces are ________.
A
balanced
B
unbalanced
C
noncontact
D
action-reaction
6) How is energy created in the Sun?
A
nuclear fusion
B
covalent bonding
C
star bonding
D
nuclear growth
7) What is the term for heat moving through a material or from one material to another?
A
convection
B
radiation
C
conduction
D
temperature
8) A metal spoon and a plastic spoon are placed in hot water. After a minute, the metal spoon feels hot and the plastic spoon feels warm. How is heat transfer different between the two spoons?
A
The metal spoon allows conduction to occur faster than the plastic spoon.
B
The metal spoon radiates heat, but the plastic spoon does not.
C
The plastic spoon radiates heat, but the metal spoon does not.
D
The plastic spoon allows conduction to occur faster than the metal spoon.
9) The heat from the sun reaches us by ___________?
A
conduction
B
radiation
C
temperature
D
convection
10) A space heater produces warm air in a room. Heat in the room moves with the warm currents from warmer areas to cooler areas. This is an example of _____?
A
radiation
B
temperature
C
conduction
D
convection
*select an answer for all questions
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