I. Write “True” for the correct statements and “False” for the incorrect statements.
1. Air has a definite shape but not a definite volume.
2. Gravity is the pull of an object toward the earth.
3. Solids’ particles are close and tightly packed each other.
4. Heterogeneous mixtures are also known as solution.
5. In the first order lever, the load is between the fulcrum and the effort.
6. Non-metals are good conductors of heat and electricity.
7. Force is a push or a pull of objects towards a certain direction.
8. Mixtures are pure substances obtained by chemical combination of two or more elements.
Ans-
1.True
2.True
3. True
4.False
5.False
6. False
7.True
8. False
I. Match forms of energies listed under column “A” with their source listed under column ‘B’
A B
1. Chemical energy A. energy from the sun
2. Electrical energy B. energy from dry cell
3. Gravitational energy C. energy in electrical stove
4. Solar energy D. energy of a moving body
5. Sound energy E. energy of a compressed spring
6. Kinetic energy F. energy of a sound wave on point
Ans-
1.B
2.C
3. E
4.A
5.F
6. D
II. Choose the most appropriate words among the given alternatives.
1. Which of the following is an excretory organ?
A. Lungs B. Skin C. Kidney D. All
2. The main excretory product in mammals’ is called__________________.
A. Phosphate waste B. Water C. Nitrogenous waste D. Urea and sweat
3. All of the following organs are concerned with excretion except
A. Kidney B. Lung C. Skin D. Heart
4. Urine is removed from the kidneys by.
A. Urethra B. Ureter C. Bladder D. None of the above
5. Which of the following is important way of preserving food?
A. Drying B. Heating C. Cooling D. All of the above
6. Which one of the following provides chemical energy?
A. Food B. Rolling ball C. Dry cell D. A and C
7. A moving car has a_______________
A. Potential energy C. Gravitational energy
B. Kinetic energy D. Heat energy
8. The most widely used energy by human being is
A. Potential energy C. chemical energy
B. Solar energy D. Wind energy
9. Which one of the following is a chemical energy?
A. Energy in food C. Energy in a dry cell
B. Energy in petroleum D. All
10. When a ball is taken from the ground to a certain height, the ball will gain.
A. Kinetic energy C. Gravitational energy
B. Electrical energy D. Natural gas
11. . Which one of the following is a renewable source energy?
A. Wind power B. Oil C. Fossil fuel D. Natural gas
12. The ultimate source of energy for living things is
A. Food B. Fossil fuel C. Sun D. Wind power
13. Which of the following is a natural source of light?
A. Light bulb B. Candle C. Sun D. Torch light
14. Light rays travel in _________lines.
A. Curved B. Straight C. Zigzag D. All
15. A dark area behind an object is a / an___________.
A. Image B. Shadow C. Ray D. Beam
16. A group of light rays is called _______________.
A. Beam B. Refraction C. Image D. Reflection
17. Which of the following is a transparent substance?
A. Water B. A stone C. Card board D. Tracing paper
18. A stone is an example of ___________.
A. Transparent substance C. Translucent substance
B. Opaque substance D. All
19. Identify the substances that exist as liquid under normal condition.
A. Carbon B. Aluminum C. Mercury D. Silver
20. The change of state from gas to liquid is called .
A. Condensation B. Evaporation C. Melting D. Sublimation
21. Which of the following substances is an element?
A. Carbon Dioxide B. Aluminum C. Sodium Chloride D. Ammonia
22. Which of the following substances is a compound?
A. Copper B. Sulfur C. Gold D. Magnesium Hydroxide
23. Which of the following is non-metallic element?
A. Copper B. Aluminum C. Silver D. Carbon
Ans-
1.D 2. D 3. D 4.D 5. D 6. D 7.B 8.B 9.D 10.C
11.A 12.C 13. C 14.B 15.B 16. A 17.A 18.B 19.C 20.A
21.B 22.D 23.D
IV. Fill in the blank spaces with appropriate words from the box.
1. A __________________________ is made of a bar that turns on a point.
2. The point on which a lever turns is called _________________________________.
3. The weight that is lifted by a simple machine is known as ________________.
4. The pull of an object toward the earth is called ________________________________.
5. __________________________ is used to perform work.
6. _________________ is the only liquid non-metal at room temperature.
7. The amount of matter contained in any object is known as __________________.
8. The process of changing a substance from liquid state to gaseous state is known as _________________.
Ans-
1.D 2. E 3.F 4.G 5.B 6.I 7. H 8.C
V. Write the correct answers for the following questions.
1. Write the two types of energy?
A. ________________________________ B. _______________________________
2. What is the SI unit of energy? ____________________________________________
3. Write three examples of renewable energy?
A ___________________ B. ____________________ C. _____________________
4. List two examples of non-renewable energy sources?
A.____________________________ B. ___________________________________
Ans-
1. A. Kinetic energy B. Potential energy.
2. Joule
3. A. water B. plant C. wind
4. A. soil. B. petroleum
SECTION A
FILL IN THE BLANKS Marks
1 __________________ are building blocks of rocks.
2 ___________________ is a sedimentary rock formed from the remains of plants
3 To prevent erosion of soil by rivers, __________________ are built along their banks.
4 The most fertile layer of the soil is _______________________.
WRITE TRUE OR FALSE
5 Soil contains living organisms. (Answer:___________)
6 Wind erosion is greatest in a hilly area. (Answer :____________)
7 Fossils are found in sedimentary rocks only. (Answer :____________)
8 Chalk is an important mineral present in limestone (Answer :__________)
MULTIPLE CHOICE QUESTIONS
9 The major mineral present in sandstone is _______________
a)Calcite b) quartz c) feldspar d) mica
Answer : ---------
10 ______________ is a hard rock formed when magma cools
slowly under the surface of earth.
a) Basalt b) pumice c) marble d) granite
Answer : ----------
11 Which of the following process can reduce the soil erosion?
a) over grazing b) ploughing c) step farming d) deforestation
Answer : ---------
12 ______________ is a metamorphic rock
a) marble b) granite c) shale d) conglomerate
Answer:----------:
SECTION B
ANSWER IN ONE WORD OR ONE SENTENCE
1 Define Magma.
________________________________________________________________
________________________________________________________________
2 Write any TWO factors that cause weathering of rocks.
________________________________________________________________
________________________________________________________________
3 What effects heat and pressure have on rocks?
________________________________________________________________
________________________________________________________________
4 How will you reduce the soil erosion caused by water in hilly areas?
________________________________________________________________
________________________________________________________________
ANSWER THE FOLLOWING IN TWO SENTENCES
5 How is pumice formed? Write any Two uses of it.
6Write any TWO ways in which soil is useful for organisms.
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