CQ FOR STD-VII( SCIENCE)

CHAPTER-1: LOWER ORGANISMS: CQ-1:

Fig: A Fig: B a. What is eukaryote? b. Write down the functions of pseudopodia? c. Explain the preventive measures against the disease caused by B. D. Mentioned Fig: A is an important organism for our environment.Describe CQ-2: Mr. ’A’ is attacked by special type of virus. Now he is suffering from fever. Mr. ‘A’ went to hospital and Doctor advised him to use handkerchief while coughing and sneezing. a. What is called prokaryota? b. What do you mean by Pseudupodia? c. What are the reasons for telling Mr. ‘A’ to use handkerchief? d. How would Mr. ‘A’ make others aware of the preventive measures against the disease? CQ-3: For prevention and remedy of the diseases caused by Virus, Bacteria, Fungi and Entamoeba, A joint effort is needed to follow the rules of hygienic carefully. Everybody should take balanced diet regularly according to body need. a. What is uriod? b. Write the functions of Algae? c. How vegetables get contaminated by Entamoeba. d. How prevention and remedy can be taken against health hazards caused by microbes?

CHAPTER-2:Lower Organisms: CQ-1: In natural environment, One can observe many similarities and dissilarities amongst various plants and animals, irrespective of their size, structure and activities. The main similarity is that bodies of the organigms are composed of cells.Plant cell is covered by cell wall on the other hand animal cell is covered by plasma membrane. a. What is plasma? b. What do you mean by protoplasm? c. Explain the structure of plant cell from the above mentioned stem. d.There are difference between plant cell and animal cell- Give your opinion based on the stem. 2.

a. What is called cystoplasm? b. Write the functions of meristematic tissue? c. Why part marked-A is called the power house of the cell?. Explain. d. Analyze the importance of organelle marked –B in the above diagram. 3. While teaching the students about tissue in the class Science teacher said that one kind of tissue is mainly responsible for the pain in skin from mosquito biting. The cells of this tissue are made of three components. Three components, combining one by one carry sensation to the brain . a. What is nerve tissue? b. Why protoplasm is called chemical basis of life? c. Explain what will be the problem if these cells of your skin do not work. d. Draw a labeled diagram of the unit of mentioned tissue.

A

B

CHEPTER-3: Morphology of a plant: 1. Mr.’M’ Went to Sundarban, the biggest mangrove forest in the world. He saw roots of Sundari tree comes up. While he said this to his science teacher, his teacher said this is a modification of adventitious root. He also said adventitious roots are modified for different purposes. a. What is scale leaves? b. What do you understand by underground modified stem? Ex plain. c. Discuss the modification of adventitious root that Mr. ‘M” saw in Sudorban. d. Discuss modification of adventitious root for mechanical support. 2.

Fig. A Fig. B a. What is runner? b. What do you mean by tap root? c. Distinguish between A and B. d. Evaluate the modification of adventitious root. CHAPTER-6: Structure of Matter: 1. The idea put forwarded by scientist Dalton about atom is known as atomic theory. So that he is called the father of modern chemistry. a. What is intermolecular space? b. What is ment by molecule? c. State Dalton’s atomic theory. d. Write the differences between atom and molecule. 2. Molecules are arranged side by side in the substance. Every molecule of a substance has its own shape. Due to there is some spaces among the molecules. It is known as intermolecular space. For this space the cherecteristics os solid, liquid and gaseous substances are different from each other. a. Who was John Dalton? b. Write the difference between atom and molecule?

c. What are the types of molecules? What is the difference between hydrogen and water molecules? d. Describe with diagram, how the molecules of solid, liquid and gas exist? CHAPTER-7: The use of Energy: 1. Karim, a labourer, can raise 30 bricks at a time in two minutes upto a height of 15 metre from the ground. But Rahim requires 3 minutes to raise 30 bricks upto the same height. Each brick weight 1 Newton. a. What is kinetic energy? b. Write necessity of energy transformation. c. Calculate the work of Rahim. d. Put mathematicxal arguments of your assumption for more working power between Karim and Rahim. 2. Now a days Mr. Rakib producing one kind of gas from the experiment of animals of his farm. He can sell extra gas after fulfilling the demand of his own firm. a. What is the unite of work? b. What do you understand by conversation of energy? c. Explain the nature of the source of energy of the gas produced by stimulator. d. Analyze the necessity of activities of Mr. Rakib regarding energy conservation. 3. Now a day Mr. Mozahid is producing one kind of gas from the experiment of animals of his firm. He can sell extra gas after fulfilling the demand of his own firm. a. What is mechanical energy? b. What do you understand by solar energy? c. Explain the nature of the source of energy of the gas produced by stimulator. d. Analyze the necessity of activities of Mr. Mozahid regarding energy conservation.

Chapter-8: About Sound. 1. Sound was only the ancient communication system. The expression of mind, varieties symbols, any phenomena can be explained with the help of sound. Without sound life is meaningless. a. What is sound pollution? b. What do you meant by 212m? c. Describe the mechanism of propagation of sound in air. d. The persistence of sound in air is 1/10th sec. and the velocity of sound is 332 meter per second. What must be the minimum distance between source and reflector to hear echo? 2. The sound of school bell was not heard for a long from Rastul’s house. Recently the shape of the bell has been changed keeping the weight as before. As a result now he can hear the sound of the school bell from his residence. a. What kind of sound wave is? b. What is meant by 332? c. Describe the techniques of reaching sound to Ratul’s ear from the school bell. d. What kind of changes has been made to the bell for which Ratul can hear the sound from his residence? Analyze this with appropriate cause. 3. Teacher of ‘M’ gave him a lesson how an echo is formed . If you maked loud sound in an open field and night or in front of mountain or rows of buildings, ,then you will hear a sound. The length of the reading room of ‘M’ is 6m. He tired to hear an echo- but he did not hear any echo. So he asked his teacher about the reason. His teacher explained him due to persistence period of sensation of sound this is happened. a. What is sound? b. Why the larger surface area is required to produce an echo? c. Why M did not hear echo in his room? Explain. d. Describe the process of determining the depth of a well by means of echo. Chapter-12: The solar system and our Earth. 1. Ms.‘M’ and ‘N’ went to visit space centre situated at Agargaon in Dhaka. She saw a wall map of solar system hanging on the wall. Mr.’M’ observed that sun in the centre and eight planets are revolving around it keeping a particular

distance. Ms. ‘N’ said, planets of this solar system have no light and heat of their own. They get heat and light from the sun. a. What is the largest planet of the solar system? b. Draw the model of solar system. c. How different planets are getting heat and light according to N’s opinion? Explain. d. Discuss the features of different planets that ‘M’ saw on that wall map. 2. Md . Malek reads in class seven. He wanted to know how day and night occur from his mother. His mother took him to the globe and put off the light and then she light the candle and put it beside the globe and understood him day and night occur . She also said that in addition to rotating on its own axis, the earth is also revolving around the sun along its orbit. a. When Halleys’s comet will be appeared again? b. Venus is not a star-Explain. c. The earth is also revolving around the sun along its orbit. What would happen if earth does not move around the sun? d. With diagrams describe the change of seasons. 3.

Fig: M a. what is called Planet? b. Why we do not fall down from the earth? c. How we get heat and light from ‘A’? d. With diagrams describe the change of seasons.

A

MCQ FOR CLASS VII( SCIENCE)

Chapter-1: Lower Organisms: 1. Fungus named----- is used in bakery. a. Bacteria b. Virus ⌂c. Yeast d. Amoeba 2. What is present in Virus body? a. Nucleus b. Cytoplasm ⌂ c. Protein coating d. Golgi bodies 3. How many types of microbial world? a. 1 ⌂ b. 3 c. 2 d. 4 4. Which helps in removing jute fibres? a. Virus ⌂b. Bacteria c. Fungi d. a and b 5. How many types of dysentery? a. 1 b. 3 ⌂ c. 2 d. 4 6. Which one is known as plankton? a. Virus b. Bacteria c. Fungi ⌂ d. Algae 7. Red rust occurred in ------. ⌂a. Tea b. Paddy c. Jute d. Tobacco 8. Where does Amoeba grows? a. Dry soil ⌂b. Wet soil c. Cow dung d. a and b 9. Amoebic dysentery caused by ------. ⌂a. Entamoeba b. Yeast c. Bacteria d. Baciillaary 10. Which suffers from Anthrax? a. Tea plant b. Jute plant c . Bird ⌂d. Cattle 11. Reproduction of Amoeba--- I. Cell division ii. Formation of spores iii. Budding Which one is correct? a. I ⌂ b. i & ii c. iii d. I,ii & iii 12. Fungal disease of human--- i. Ring worm ii. Freckles iii. Late blight Which one is correct? ⌂a. i & ii b. i & iii c. ii & iii d. I,ii& iii 13. T2 Bacteriophage virus has----. i. Head ii. Tail iii. Tail fibre Which one is correct? a. i & iii b. i & ii c. ii & iii ⌂d. I,ii & iii 14. Whittaker and Margulis proposed to place microorganisms under----.

i. Animalia ii. Monera iii. Protista Which one4 is correct? a. I & ii b. I & iii ⌂ c. ii & iii d. I,ii& iii 15. Which organ of Amoeba works as its mouth? a. Vacuoles ⌂ b. Pseudopodia c. Cyst d. Hands 16. Which one is chlorophyll less? A. Mango tree ⌂b. Fungi c. Fern d. None 17. Which are viral diseases? ⌂a Measles, Pox b.Influenza , Pneumonia c.Tetanus , Bloood Dysentery d. Cholera , Pox

Chapter-2:Cellular Organism: 1. Cardiac muscle is a type of------. a. Voluntary muscle ⌂b. Involuntary muscle c. Mitochodria d. nerve tissue 2. Cell wall composed of---. ⌂a. Cellulose b. Protein c. Glucose d. Liposome 3. Where cell vacuoles are more? a. protoplasm ⌂ b. Cytoplasome c. Mitochondrion d. Nucleus 4. What is percentage of water present in protoplasm? ⌂a. 67-90% b. 20-37% c. 57-67% d. 70-80% 5. How many kinds of chromatoplastids are there? a. 5 b. 3 c. 4 ⌂ d. 2 6. During ripening of green fruits, chloroplasts are converted to-----. a. Charotin b. Leucoplast ⌂ c. Chromoplast d. Lysosome 7. Every nucleus composed of how many parts? a. 3 ⌂b. 4 c. 5 d. 2 8. Whose covering is the neurilemma? a. The cell body b. Dendron ⌂ c. Axon d. Dendrite 9. The matrix substance of bone is-----. a. Phosphorus ⌂b. Calcium c. Nitrogen d. Fluid 10. Which is absent in animal cell? a. Golgi body b. Ribosome c. Chromatin ⌂ d. Cell wall 11. What type of muscle bicep is? A. Epithelial ⌂ b. Voluntary c. Involuntary d. Cardiac 12. Where cell vacuoles are more in number? ⌂a. Plant b. Fungi c. Animal d. Bacteria 13. Which is called the power house of cell? a. Nucleus b. Lysosome c. Golgi body ⌂ d. Mitochondrion

14. Functions of plastid---. i. synthesis of food ii. pigmentation iii. storage of food Which one is correct? a. I b. ii c. i& ii ⌂ d. I,ii&iii 15. Connective tissue connects different tissues and organs, such as— i. blood ii. bone iii. fat cell Which one is correct? a. ii b. I c. iii ⌂ d. I,ii&iii 16. Cardiac muscles----- i. lightly striped ii. Muscles with circolemma iii. amount of matrix is high Which one is correct? a. I b. iii ⌂c. i&ii d. ii& iii 17. Brain is composed of innumerable ----cell. a. Muscle ⌂ b. Neuron c. Ribosome d. a and b

Chapter-3: Morphology of a plants 1. Sweet potato is a modified -----. ⌂a. Roots b. Stems c. Leaves d. a and c 2. Which is tubercular root? ⌂a. Sondhya maloti b. Radish c. Carrot d. Potato 3. Which is Fusiform root? a. Carrot b. Turnip c. Ginger ⌂d. Radish 4. Whose root is nodulose root? a. Potato ⌂ b. Amada c. Carrot d. Gourd 5. Roots of some plants take part in reproduction such as--- ⌂a. Sweet potato b. Sundari c. Goran d. Orchid 6. Which has climbing roots? a. Keya ⌂b. Betel vine c. Banayan d. Amada 7. In which one aerial roots is seen? a. Keya b. Dhalia ⌂ c. Orchid d. Betel vbine 8. Based on the position, modification of stems are how many types? a. 4 b. 5 ⌂c. 3 d. 6 9. How many types of underground modified stems? a. 3 ⌂ b. 4 c. 2 d. 5 10. In which plant leaves are modified to spine? a. Pitcher plant b. Patharkuchi c. Harkjora ⌂ d. Lemon

11. Cavities at the leaf axils of scale leaves are called--- ⌂a. Eye b. Ear c. Tendrils d. Buds 12. Which is seen in Sundori tree? a. Reproductive root ⌂ b. Respiratory root c. Aerial root d. Stilt root 13. Upper side is broad and lower side is gradually tapering- a. Ginger b. Radish c. Potato ⌂d. Carrot 14. Stilt root contain--- i. nodes ii. inter nodes iii. leaves Which one is correct? a. I & ii b. I & iii c. ii and iii ⌂d. I,ii&iii 15.Example of bulbs— i. Onion ii. Garlic iii. Ginger Which one is correct? a. I & iii ⌂ b. I & ii c. ii & iii d. I, ii& iii 16. Which plants develop throns? i. Wood apple ii. Maina kata iii. Lowsonia Which one is correct? a. I & ii b. I & iii c. ii & iii ⌂ d. I, ii & iii 17. Respiratory roots are found in--- i. Keya ii. Sundori iii. Goran Which one is correct? a. I & ii b. I & iii ⌂ c. ii & iii d. I, ii & iii

Chapter-6: Structure of Matter: 1. Which matter has minimum inter atomic –energy? a. Iron b. Water c. Ice ⌂ d. Air 2. What is number of elements occurred in nature? a. 118 b. 20 c. 92 ⌂ d. 98 3. In laboratory how many elements are prepared by scientist? a. 118 ⌂b. 20 c. 98 d. 110 4. Which one is compound? a. Soap b. Soda c. Salt ⌂ d. All of above 5. What is the meaning of ‘Atom’? a. Invisible b. Visible ⌂c. Indivisible d. Undivided 6. In which year the idea about atom was given by John Dalton? a. 1880 b. 1780 c. 1890 ⌂ d. 1803 7. Which one is the example of solid elements?

a. Gallium ⌂ b. Carbon c. Krypton d. Mercury 8. How many types of molecule? ⌂a. 2 b. 3 c. 4 d. 1 9. Which elementary gases are diatomic? a. Neon b. Argon c. Carbon ⌂ d. Chlorine 10. Which one loses its identity when it is broken down? a. Molecule ⌂ b. Atom c. Both a & b d. None of these 11. Every molecule of a substance has its own— a. Size ⌂ b. Shape c. Both a & b d. None of these 12. Which one is not matter? ⌂a. Soil b. Hydrogen c. Oxygen d. Gold 13. What is the formula of Ammonia? a.NH2 B . Na ⌂ c. NH3 D. CO 14. The symbol of Boron is--. a. Bi b. Be c. Ba ⌂ d. B 15. Which contain two atoms? i. Oxygen ii. Nitrogen iii. Chlorine Which one is correct? a. I b. I & iii c. ii & iii ⌂d. I,ii & iii 16. Which one consists of one atom? i. Helium ii. Hydrogen iii. Argon Which one is correct? a. I b. I & ii ⌂c. I & iii d. ii & iii 17. Which is the symbol of Calcium? a. Na b. Co c. Cu ⌂d. Ca

Chapter-7: The use of Energy: 1. ----of work is called energy. ⌂a. Capacity b. Power c. Strength d. a & c 2. What is the unit of energy? a. Candela ⌂b. Joule c . Meter d. Kilogram 3. Unit is same for— a. Mass & Energy b. Velocity & mass ⌂c. Work & Energy d. a & c 4. What is present in petrol, gas and coal? a. Chemical energy b. Mechanical c. Atomic energy d. Thermal energy 5. Solar energy is formed of—

a. Heat & Electricity b. Heat & Sound ⌂c. Light & Heat d. Light & Air 6. What type of energy is stored in food and fuel? a. Mechanical energy b. Thermal energy ⌂c. Chemical energy d. Atomic energy 7. Which is related to work? ⌂a. Change of position b. Inertia c . Rest of object d. Destruction of object 8. Which is renewable energy? a. Coal ⌂b. Biogas c. Natural gas d. Petroleum 9. Which is used in Biogas? a. Diesel and gas b. Petrol ⌂c. Excrements from cows,hens, plants d. Natural gas 10.Which machine is used for converting solar energy into electricity? a. Electric bulb b. Steam engine c. Lantern ⌂d. Pocket calculator 11. Which is used to pick up heavy loads? a. Electric chord b. Thread ⌂c. Electric magnet d. Switch 12. Sender machine of a telephone or radio turns sound energy into— a. Light b. Power ⌂ c. Heat d. Sound We have so many----sources around us. a. Power b. Biogas ⌂ c. Energy d. a & b 13. Natural gas is our-----asset. a. Costly b. Demandable c. a & b ⌂d. Priceless 14. -----is produced when coal is burned. ⌂a. Heat b. Energy c. Biogas d. Power 15. From sun we get--. i. Heat ii. light iii. Sound Which one is correct? a. i ⌂b. i & ii c. ii & iii d. I,ii & iii 16. Mechanical energy— i. Chemical energy ii. Static energy iii. Kinetic energy Which one is correct? a. ii b. i & iii ⌂c. ii & iii d. i, ii & iii 17.Capacity of doing work— i. Power ii. Energy iii. Force Which one is correct? a. I & ii b. ii & iii ⌂ c. ii d. I & iii

Chapter: About Sound: 1.Sound is produced as a result of--.

⌂a. Vibration b. Heat c. Compression d. None of these

2. In which medium does sound travel? a. Gas b. Liquid c. Solid ⌂d. All the above 3. Which object is more suitable to produced echo? a. Cotton cloth b. Rubber foam c. Paper ⌂d. Steel 4. What is the frequencies of infrasonic sound? a. Less than 20m Hz and more than 2000Hz b. Above 20 Hz ⌂c. Between 20-22000Hz c. Above 20000Hz 5. The velocity of light is--- than that of sound? a. Lesser b. Equal c. Higher ⌂ d. Much higher 6. What is the velocity of sound in air at the temperature of degree Celsius? a. 300m/s b. 320 m/s ⌂ c, 332m/s d. 350m/s 7. What is produced by reflection of sound? a. Frequency ⌂ b. Echo c. Compression d. Refraction 8. What is the velocity of sound in clean water? a. 300 m/s b. 3200m/s ⌂ c. 1440m/s d. 3500m/s 9. Why does the voice of female is shrill? ⌂a. For higher frequency b.For lower frequency c. Vocal cord is flat d.None of these 10. Usually,Stethoscope is used by whom? a. Scientists b. Teacher ⌂C. Doctors d. Engineer 11. What is responsible of object to create sound? ⌂a. Vibration b. Compression c. Refraction d. Reflection 12. How does Bat moves in the dark? a. By the eye b. By feelings ⌂c. By using ultrasonic sound d. By infrasonic sound 13. To hear echo early, What must be the time interval between original sound and echo? a. 1 second b. 10 seconds ⌂ c. 1/10 second d. 1/100 second 14. As a real picture of reflection of sound What is responsible— i. resonance ii. echo iii. beat Which one is correct? a. i ⌂b. ii c. iii d. I & ii 15. Tones are produced in piano due to--- i. the vibration of leather ii. the vibration of air iii. the vibration of strings Which is one correct? a. I ⌂b. ii c. iii d. I & iii

Chapter-12: The solar system:

1. -----planet moving around the sun. a. 9 ⌂ b. 8 c. 10 d. 11 2.How many types of earth’s motion? a. 5 b. 3 ⌂c. 2 d. 6 3. Who told strongly that all things moves round the earth? ⌂a. Ptolemy b. Copernicus c. Galioleo d. Kepler 4. Which is the nearest planet to the sun? a. Venus ⌂b. Mercury c. Earth d. Mars 5. What is called red planet? ⌂a. Mars b. Jupiter c. Mercury d. Pluto 6. How many artificial satellites are moving around the earth? a. 2000 b. 1500 ⌂c. 2500 d. 1000 7.Which is the smallest luminary revolving around the sun? ⌂a. Meteors b. Asteroids c. Satellite d. Comet 8. How much time the requires revolving around the sun? a. 345 days 8 hours b. 350 days 6hours c. 363 days 6 hours ⌂d. 365 days 6 hours 9. When Halley’s Comet will be appeared in sky of the earth again? a. 2020 b. 2042 ⌂c. 2062 d. 2052 10. Which season prevails in Bangladesh during 21th march? a. Winter ⌂ b. Spring c. Summer d. Rainy season 11. The sun shines vertically over the equator on— a. 23rd September b. 21th December ⌂c. 21th march d. None 12. When day and night becomes equal across the globe? a. 23rd March b. 21th December ⌂ c. 21th March d. 23RD June 13. What types of matters present in planet? a. Liquid b. Carbonic ⌂c. Gaseous d. Chemical 14. Sun contains mainly ---- ⌂a. Hydrogen and Helium gas b. Only Hydrogen gas c. Only Oxygen Gas d. Carbon 15. The huge universe beyond our vision is called- ⌂a. Space b. Asteroids c. Vacuole d. Big Bang 16. How far sun is situated from the earth? ⌂a. 15 crores km b. 10 crores km c. 8 crores km d. 25 crores km 17. Burning gaseous body of star contains— i. Hydrogen ii. Helium ii. Oxygen Which one is correct? a. I b. ii & iii c. I & ii d. I,ii & iii

18. Uranus is made of— i. stone ii. gas iii. ice Which one is correct? a. I ⌂ b. ii & iii c. I &ii d. I, ii & iii 19. Comets are made of- i. gas ii. ice iii. dust Which one is correct? a. I b. ii c. I & ii ⌂d. I, ii & iii 20. Day and night equal— i. 23rd September ii. 21st march iii. 21th June Which one is correct? a. I b. ii ⌂c. I & ii d. I,ii & iii