Energy Flashcard 2
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is kinetic energy?
Back
Kinetic energy is the energy an object possesses due to its motion. It is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.
2.
FLASHCARD QUESTION
Front
What happens to kinetic energy when an object rolls across a surface?
Back
The kinetic energy is transformed into thermal and sound energy due to friction with the surface.
3.
FLASHCARD QUESTION
Front
What is the difference between velocity and kinetic energy?
Back
Velocity is a vector quantity that describes the speed and direction of an object, while kinetic energy is a scalar quantity that depends on the mass and speed of the object.
4.
FLASHCARD QUESTION
Front
Why are there typically more herbivores than carnivores in an ecosystem?
Back
More energy is available to herbivores than to carnivores because energy decreases as it moves up the food chain.
5.
FLASHCARD QUESTION
Front
What type of energy is associated with a moving object?
Back
Kinetic Energy.
6.
FLASHCARD QUESTION
Front
How is energy efficiency calculated?
Back
Energy efficiency is calculated using the formula: Efficiency = (Useful energy output ÷ Total energy input) * 100.
7.
FLASHCARD QUESTION
Front
What is potential energy?
Back
Potential energy is the stored energy of an object due to its position or state. For example, a raised object has gravitational potential energy.
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