7th Grade- Unit 8 (energy And Calculations) Question Preview (ID: 36245)
Energy.
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All forms of energy are a combination of
a) mechanical and chemical energy
b) chemical and kinetic energy
c) potential and thermal energy
d) potential and kinetic energy
Which type of energy is transmitted by vibrations of air?
a) electromagnetic
b) nuclear
c) sound
d) chemical
when energy is converted from one form to another, what is usually produced?
a) chemical energy
b) heat
c) gravity
d) potential energy
an objects kinetic energy is determined by it's
a) position or composition
b) speed and position
c) speed and mass
d) height and width
which of the following is a conversion of chemical energy into mechanical energy?
a) a dark light bulb starting to glow
b) food being cooked in an oven
c) a ball rolling down a hill
d) a person eating lunch and going for a jog
an energy efficient fan coverts a large portion of electrical energy that enters it into
a) an unwanted form of energy
b) thermal energy (heat) in the motor
c) kinetic energy of the fan blades
d) sound energy in the fans motor
The energy in wind that is used to generate electricity is
a) chemical energy
b) kinetic energy
c) sound energy
d) solar energy
a skier on top of a hill has potential energy due to
a) speed
b) energy efficiency
c) compression
d) position
a skateboarder on a ramp has the most potential energy
a) at the bottom of the ramp
b) half way down the ramp
c) at the top of the ramp
d)
a skateboarder on a ramp has the most kinetic energy
a) at the bottom of the ramp
b) half way down the ramp
c) at the top of the ramp
d) never has kinetic energy on a ramp
the law of conservation of energy states that
a) energy can be created and destroyed
b) energy cannot be created or destroyed
c) energy cannot change forms
d) each time energy changes forms, more energy is produced
what does BTU stand for?
a) British Time Unit
b) British Thermal Unit
c) Basal Thermal Unit
d) British Temperature Unit
Energy from the movement of particles in matter is called
a) nuclear energy
b) thermal energy
c) solar energy
d) chemical energy
when the particles in an atom's nucleus break apart, this type of energy is released
a) chemical
b) mechanical
c) nuclear
d) thermal
Light is a form of
a) electromagnetic energy
b) thermal energy
c) nuclear energy
d) sound energy
a bowling ball and a soccer ball are rolling at the same speed, which has more kinetic energy?
a) the soccer ball
b) the bowling ball
c) they are equal
d)
a car and an 18 wheeler truck are driving on a road at 80 mph, which has more kinetic energy?
a) car
b) truck
c) both are equal
d)
Two trucks of the exact same size, make, and model are driving down the road. Truck A is going 60 mph and truck B is going 90 mph. which has more kinetic energy?
a) truck A
b) truck B
c) both are the same
d)
which is not a way that technology has IMPROVED the way we currently use energy?
a) burning fossil fuels
b) solar panels
c) LED light bulbs
d) hybrid cars
what the the EER of a cooling system (air conditioner) that uses 500 watts of electricity to cool 6000 BTUs per hour at 95F?
a) 5 EER
b) 12 EER
c) 8 EER
d) 4 EER
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