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Answer:
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QUESTION 1
A) Choose the correct answer from each of the four options given below. 1. A force does not change
ANSWER : a) Mass
2. A body fall downwards because of
ANSWER : b) Gravitational Force
3. A metre ruler is graduated in:
ANSWER : c) mm
4. 10 mm is equal to:
ANSWER : a) 1cm
5. The solids are
ANSWER : a) More Dense
6. The inter-molecular forces in liquid are
ANSWER : c) Weaker Than in Solids
B. Fill in the blanks.
1. A solid is most rigid.
2. The metric tonne = 1000 kg.
3. On pulling a string, its length changes.
4. The inter-molecular forces are the weakest in gases.
5. Friction opposes the motion.
6. The thermometer used to measure the human body temperature is called Clinical Thermometer (Medical Thermometer).
C. Write true or false. If false, rewrite the correct statement.
1. The unit of weight is kilogram.
ANSWER : TRUE
2.The sliding friction is more than the rolling friction.
ANSWER : TRUE
3. In a gas, the molecules can move anywhere in space.
ANSWER : TRUE
4. The SI unit of temperature is Fahrenheit.
ANSWER : FALSE
Correct Statement : The SI unit of temperature is Kelvin.
5. The force of friction is always disadvantageous.
ANSWER : FALSE
Correct Statement : The force of friction is advantageous in some cases.
Ex. : Friction enables us to walk freely.
Break of vehicles work due to friction.
6. The frictional force acts in the direction of motion of body.
ANSWER : FALSE
Correct Sentence : The frictional force acts in opposite direction of motion of body.
D. Match the following:
1. Like poles - Repel
2. Ice, water and water vapour - Are the three states of water
3.Friction - Wear and tear
4. Period of time for study - Clock
5. Length of housing plot - Measuring tape
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