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自然科學
國小五六年級
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1
What is potential energy?
A
Energy that is always in motion
B
Energy that is stored due to an object's position or arrangement
C
Energy that only exists in living things
D
Energy that can never be used
2
A book is placed on a shelf. If the shelf is raised to a higher position, what happens to the book's gravitational potential energy?
A
It becomes zero
B
It decreases
C
It stays the same
D
It increases
3
Maria drops a ball from a height of 1 meter, and then from 2 meters. From which height will the ball have more gravitational potential energy just before it is dropped?
A
Both have the same potential energy
B
It depends on the ball's color
C
From 1 meter, because it is closer to the ground
D
From 2 meters, because it is higher
4
A roller coaster car is at the top of a hill. As it moves down the hill, what happens to its potential energy and kinetic energy?
A
Both potential and kinetic energy decrease
B
Potential energy decreases, kinetic energy increases
C
Potential energy increases, kinetic energy decreases
D
Both potential and kinetic energy increase