1.One acre, and 1 hectare’s respectively are
4047 m2, 2.47 acre
4047 m, 2.47 acre
4047 cm, 2.47 acre
4047 km, 2.47 acre
2.Who invented Advanced Microscope
Robert Hooke
Robert Brown
John Ray
Ernst
3. Identify the correctly matched
Melting of Ice – Irreversible Change
Batter into Idly – Irreversible Change
Ripening of Fruits – Irreversible Change
2 and 3
4.Under the force of gravity the mechanical energy of a body is
Zero
Increase
Constant
Decrease
5.A Device which is used for measuring mass
Tape
Beam Balance
Sundial
Scale
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