WorksheetsPERIODIC EXAM in SCI 8
Total questions: 20
Worksheet time: 15mins
The energy in motion.
Kinetic energy
Mechanical Energy
Potential energy
Frequencies lower than 20 000 Hertz are called_________.
Sound
Infrasonic
Ultrasonic
What happens to the kinetic energy of a ball that is thrown straight up as it rises and falls down?
Increases then decreases
Decreases then increases
Remains constant
What determines the inertia of a object?
Mass
Velocity
Kilograms
A car suddenly stops and its passengers are suddenly jerked forward from their seats. What causes this?
The brake pedals
The force of the backseat
Resistance of the body from changes in motion
A falling rock possesses what kind of energy?
Kinetic energy
Potential energy
Kinetic and Potential energy
When a ball compresses a spring then settles on top of a table upon release, the sequence of energy transformation is as follows:
GPE, KE, EPE
KE, GPE, EPE
EPE, KE, GPE
Sound waves cannot travel in________.
Air
Iron
Vacuum
He proposed the unit for force.
Isaac Newton
Heinrich Hertz.
Echolocation is used by some animals to navigate. What kind of sound waves do they produce?
Infrasonic
Ultrasonic
Which requires greater energy? The mass of water is common for all choices.
Melting ice
Heating water
A white object _________ all colors.
Absorbs
Reflects
What does an electromagnetic wave transport?
Frequency
Wavelength
It is define as the ability to do work.
(a)
It is produced from a vibrating objects.
(a)
The hierarchy of colors are separated into how many colors?
(a)
(a) - is the tendency of object to resist changes in motion.
Newton is a unit of force which is equivalent to (a)
The amount of work per unit time is called (a) .
The Earth's gravity is equivalent to (a) .
