WorksheetsDiagnostic Test Science 6 (3rd Quarter)
Total questions: 15
Worksheet time: 8mins
Why do things thrown upward fall down?
gravity ran out
friction causes them to fall
gravity make things fall
the kinetic energy of things are used up
What class of lever is a crowbar?
first
second
third
fourth
Why are there no machines with an efficiency of 100%?
machines are not durable
machines tend to deteriorate over time
machines are not capable of handling heavy jobs
machines are affected by external forces such as friction
How is mass related to gravity?
If you double the mass of an object, its gravitational force is tripled
If you double the mass of an object, its gravitational force is halved
If you double the mass of an object, its gravitational force is doubled
If you double the mass of an object, its gravitational force is increased by 1.5 times
Which of the following is a safety precaution when using a machine?
running on ramps
holding a knife upwards
holding on the hand rails of a ramp
using a sharp object without adult supervision
Which of the following converts energy from a waterfall into electrical energy?
geothermal power plant
hydrothermal power plant
nuclear power plant
solar power plant
How ill you describe a compound machine?
a combination of two simple machine
a combination of more than three machine
two separate machines that operate separately
three separate machines that operate separately
How does a percussion instrument produce a sound?
by containing their vibrations
by passing the vibrations to the air
by absorbing vibrations from the air
none of the above
Which of the following materials convert electricity to light energy?
fan
refrigerator
incandescent bulb
all of these
How is the mechanical advantage of a machine computed?
by dividing the input force by the output force
by dividing the output force by the input force
by multiplying the input force by the output force
by multiplying the output force by the input force
Which of the following is applied on the machine?
effort
fulcrum
lift
resistance
What kind of simple machine is a screw?
inclined plane
lever
pulley
wedge
Why is it that you are not allowed to plug in appliances when your hands are wet?
because it may cause fire
because you may get electrocuted
because the appliance will not turn on
because you may destroy the appliances
Which reduces friction?
making the surface cool
making the surface wide
making the surface rough
making the surface smoother
A can opener is a combination of what simple machines?
a lever and a wedge
a wedge and a screw
a lever and an inclined plane
an inclined plane and a wedge
