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WorksheetsScience Quiz ET - 4
Total questions: 22
Worksheet time: 7mins
Machines help us to do a great deal of work __________ and ____________. (You can select more than one option)
with less effort
with less money
with less time
with lesser use of brain
If a mechanic has to replace a flat tyre of a car, which is the first step to do it?
Observe the car carefully
Sit inside the car
Lift the car, with the help of jack
Drive the car
What may be the incident through which our ancestors discovered LEVER?
Move a big rock and realized that it was possible with their hands
Move small rock and realized that it wasn't possible with their hands
Move a big rock and realized that it wasn't possible with their hands
Move a big hill and realized that it wasn't possible with their hands
__________ was the first simple machine discovered by our ancestors. (Identify with the help of image)
The _________ the distance between the effort and the fulcrum, the ________ is the load that can be moved.
greater, lesser respectively
greater, greater respectively
lesser, greater respectively
lesser, lesser respectively
Crowbar is an example of second class lever
False
True
An inclined plane is a _____ surface.
smooth
flat
rough
sloping
In which type of inclined plane, we roll an object with less effort but more distance?
Gradual Slope
Steep Slope
Pulley works by changing the ________ of force due to which less force is required.
direction
process
altitude
none of these
A screw is an inclined plane.
False
True
When wheel is attached with _______, its arrangement is a simple machine.
rod
axle
both of these
none of these
The famous scientist ____________ invented a pump in the form of a screw.
Arcimidies
Archimedes
Aristotle
Newton
A wedge has how many inclined planes
1
2
3
4
Due to Moon's gravity, it pulls the Earth's ______ giving rise to _____.
land, earthquakes
waters, tornados
water, tides
none of these
Every _______ hour, there is one high tide followed by a low tide.
24
1221
12
48
When light passes through ___________ objects, it is obstructed and casts a __________.
transparent , no shadow
translucent, faint shadow
opaque, shadow
opaque, no shadow
When the Moon is completely blocked by _______ shadow, it is called ________.
Sun's , Solar Eclipse
Earth's, Total Lunar Eclipse
it's own, Lunar Eclipse
Earth's, Partial Lunar Eclipse
Artificial Satellites are about _____ km away from the Earth's.
200
300
100
350
Sputnik 1 was launched by Russia in ______.
1919
1975
1957
1944
Which part of weather satellites is used to warn people about volcanic activities, cyclones etc?
transponder
in- built camera
both of these
none of these
Which series of satellites of India is a series of multi purpose satellites.
INSAT
GSAT
Rohini
Bhaskara
When Moon casts it shadow on Earth, it is a _______.
Solar Eclipse
Lunar Eclipse
