Chapter 7: Conservation of energy

Quiz
•
Science
•
9th Grade
•
Medium

Helena Lippe
Used 3+ times
FREE Resource
35 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fill in the blank: The law of conservation of energy explains that total energy is maintained in energy transfer and ________ in a system.
transformation
evaporation
condensation
decomposition
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In energy transfer and transformation, the amount of usable energy is always 100% efficient.
True
False
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which two models are used to describe energy transfer?
Wave and particle models
Thermal and chemical models
Magnetic and electric models
Nuclear and gravitational models
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What law is applied to analyse system efficiency?
The law of conservation of energy
The law of conservation of mass
The law of inertia
The law of universal gravitation
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Laptops and phones get hot while charging because:
energy is lost as heat during charging
the battery is cooling down
the device is not working
charging uses cold air
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the definition of energy? Fill in the blank: Energy is the ability to ______ or cause a change in the shape of an object (do work). Measured in joules.
move
sleep
eat
rest
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fill in the blank: Electromagnetic radiation is energy that can travel without the need for any ______ to pass through.
material
liquid
sound
light
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