Ans. the Bodies of Living Organism Are Made up of Tiny Units Called Cells

KV THANE

CLASS – VII

______

1. Nutrition in plant

1. What is cell?

Ans. The bodies of living organism are made up of tiny units called cells.

2. Name the gas that is used by the plants in photosynthesis?

Ans. Carbon di oxide

3. Which gas is the waste product of photosynthesis?

Ans. Oxygen

4. The food making process in plants is called?

Ans. Photosynthesis 5. Which part of the plant helps it to absorb water and minerals?

Ans. Root

6. The green pigment present in leaves is called ______

Ans. Chlorophyll

7. Insectivorous plants eat insects to fulfill their needs of-

Ans. Nitrogen

8.______is called the ultimate source of energy.

Ans. Solar energy.

9. Which part of the plant is called its food factory?

Ans. Leaves.

10. Stomata are surrounded by ______cells.

Ans. Guard cell

2. Nutrition in animals

1. Largest gland present in human body?

Ans. Liver

2. Food pipe through which food passes from the mouth to stomach?

Ans. Esophagus

3. Theacid present in the stomach?

Ans. Hydrochloric acid. 4. The sac like structure in which bile is stored?

Ans. Gall bladder

5. The finger like projections present in the inner lining of small intestine?

Ans. Villi

6. Amoeba digests its food in the------

Ans. Food vacuole

7. Fat is completely digested in------

Ans. Small intestine.

8. Where does the digestion start?

Ans. Buccal cavity.

9. Give one instant source of energy?

Ans. Glucose

10. Write the importance of saliva in our mouth?

Ans. The saliva breaks down the starch into sugars.

3.Fibre to fabric

1.Name some animals other than sheep which yield wool.

Ans. Yak, goat camel alpaca etc.

2. Name any two animal fibres?

Ans. Wool and silk

3. What is ‘Sericulture’?

Ans. The rearing of silkworm for obtaining silk is called sericulture.

4.Silk fibres are made up of ------

Ans. Protein.

5. Which is the most common silk worm?

Ans. Bombyx morii

6. What are burrs?

Ans. Burrs are the small fluffy fibres in wool.

7. What is the food of silkworm?

Ans. Mulberry leaves.

8. What is reeling of the silk?

Ans. The process of taking out threads from the cocoon is called reeling.

9. From which body part of sheep wool is obtained?

Ans. Fleece

10. Silk is derived from------

Ans. Cocoon.

4. Heat

1. What is the range of laboratory thermometer?

Ans. -100C to 1100C

2. What is the method of transfer of heat in most of solids?

Ans. Conduction.

3. In which method of transfer of heat no medium required?

Ans. Radiation.

4. What kind of cloth we prefer in summer?

Ans. In summer we prefer light-coloured clothes.

5.Which metal is used in the bulb of clinical thermometer?

Ans. Mercury.

6. What is the temperature of a healthy person?

Ans. 370 C

7. Write the SI unit of temperature?

Ans. Kelvin.

8. What is heat?

Ans. Heat is a form of energy. It enables us to feel hotness or coldness.

9. What is the range of clinical thermometer?

Ans. 350C to 420C.

10. By which method we get heat from the sun?

Ans. Radiation.

5. Acids Bases and Salts

1. Acids are------in taste.

Ans. Sour.

2. What is litmus?

Ans. Litmus is the commonly used natural indicator.

3. Name two natural indicators?

Ans. 1) Turmeric 2) China rose

4. ____ is used as an antacid.

Ans. Milk of magnesia.

5. Name the acid present in lemon juice?

Ans. Citric acid.

6.From where litmus is obtained?

Ans. Lichens.

7. Vinegar contains acetic acid. (T/F)

Ans. True.

8. What is neutralization reaction?

Ans. The reaction between an acid and base is called neutralization reaction.

9. What are indicators?

Ans. Indicators are substances used to test whether a substance is acidic or basic.

10. Give an example of neutralization reaction?

Ans. NaOH + HCl  NaCl + H2O

6. Physical and Chemical Changes

1. Burning of Paper is a ______change.

Ans. Chemical

2. Physical change is ______.

Ans. Reversible.

3. Filling air in a balloon is a ______change.

Ans. Physical

4. Define chemical reaction?

Ans. A change in which one or more new substances are formed is called a chemical reaction.

5. What kind of changes involve the change in physical properties only?

Ans. Physical change.

6. Rusting can be prevented by Painting. (T/F)

Ans. True.

7. Depositing a layer of silver on iron is called galvanization. (T/F)

Ans. False.

8. What kind of change is rusting?

Ans. Chemical change.

9. Define crystallization?

Ans. Crystallization is the process of getting crystals of pure substances from their solutions.

10. What is galvanization?

Ans. The process of depositing a layer of zinc on iron is called galvanization.

7. Weather, Climate and adaptations of animals to climate

1. Define humidity?

Ans. The measure of moisture in the air is called humidity.

2. Polar bear has a layer of ______under its skin to keep it warm.

Ans. Fat.

3. The bird Toucan has a ______beak to reach fruits on branches.

Ans. Long, large beak

4. By which instrument is rainfall measured?

Ans. Rain gauge

5. What is climate?

Ans. The average weather pattern taken over a long time is called climate.

6. Name the elements that determine the weather of a place?

Ans. Temperature, humidity, rainfall, wind-speed.

7. The weather pattern of nearly how many years is called the climate of the place?

Ans. 25years.

8. Name some animals found in polar regions?

Ans. Polar bears, penguins, musk oxen, seals, whales etc.

9. Where are polar regions situated?

Ans. Near the poles.

10. When is the maximum temperature occur during the day?

Ans. Afternoon.

8. Winds Storms and cyclones

1. The calm centre of cyclone is called-

Ans. Eye.

2. A violent tornado can travel at the speeds of about______.

Ans. 300KM/h

3. Air exerts ______.

Ans. Pressure.

4. Moving air is called ______.

Ans. Wind.

5. Air ______on heating.

Ans. Expands.

6. The word monsoon is derived from the word.

Ans. Mausam.

7. This is used to measure wind speed: hygrometer/anemometer.

Ans. Anemometer.

8. A cyclone is called hurricane/ typhoon in Japan.

Ans. Typhoon.

9. The warning of cyclone can be issued—

Ans. 24h in advance.

10. Wind is caused due to-

Ans. Uneven heating of equator and poles.

9. Soil

Pulses requires ______soil.

Ans. Loamy soil.

Wheat is grown in ______soil.

Ans. Clayey soil.

Top soil is rich in ______.

Ans. Humus.

The water holding capacity is highest in-

Ans. Clayey soil.

Soil is formed by the ______of rocks.

Ans. Weathering.

Which soil is considered to be the most fertile and used for growing crops?

Ans. Loamy soil.

7. Which kind of soil required for making matkas and surahis?

Ans. Clayey soil.

8. Name the crops grown in clayey soil?

Ans. Wheat, gram and paddy.

9. Which type of soil absorbs more water but allows less water to percolate?

Ans. Clayey soil.

10. Name the crops grown in loamy soil?

Ans. Lentil, Tomato, Corn, Oats.

10. Respiration in organisms

What are the end products of aerobic respiration?

Ans. Carbon dioxide and water.

Name the end products of anaerobic respiration?

Ans. Ethyl alcohol, carbon dioxide, energy.

3. Which gas present in air is essential for aerobic respiration?

Ans. Oxygen.

Give the name of respiratory organs in fish?

Ans. Gills.

What are the respiratory organs in insects?

Ans. Spiracles.

During heavy exercise, we get cramps in the legs due to the accumulation of-

Ans. Lactic acid.

What is breathing?

Ans. The process in which air rich in oxygen is taken inside and air rich in CO2is given out is called breathing.

Name the two major steps in breathing?

Ans. 1) Exhalation 2) Inhalation

Normal range of breathing rate per minute in an average adult person a rest is-

Ans. 15-18.

Name the respiratory organs in frog?

Ans. Moist skin and a pair of lungs.

11. Transportation in animals and plants

1. What are stomata?

Ans. The tiny pores present on the surface of leaves are called stomata.

2. In plants water is absorbed through-

Ans. Xylem.

3. The lower chambers of heart is called-

Ans. Ventricles

4. The organ which controls the blood circulation in body is-

Ans. Heart.

5. The filtration of blood is done by-

Ans. Kidney.

6. Aquatic animals like fish excrete their wastes in gaseous form as-

Ans. Ammonia.

7. Name the functional unit of kidney?

Ans. Nephron.

8. Sweat contains water and______.

Ans. Salts.

9. Haemoglobin is present in______cells.

Ans. RBC.

10. Define pulse rate?

Ans. The number of beats per minute is called the pulse rate.

12. Reproduction in plants

Name the reproductive part of the plant?

Ans. Flower.

Name the vegetative parts of a plant?

Ans. Root, stem, leaves.

What is fertilization?

Ans. The process of fusion of male gamete and female gamete is called fertilization.

Mature ovary forms the-

Ans. Fruit.

5. Bryophyllum can reproduce by its-

Ans. Leaves.

Name a spore producing plant?

Ans. Yeast.

6. In which part of flower does fertilization occur?

Ans. Ovary.

What is pollination?

Ans. The transfer of pollen grains from the anther of a stamen to the stigma of a pistil is called pollination.

7. Name two plants in which pollination occurs by water?

Ans. Vallisneria and hydrilla.

8. The scars present on the potato tubers are called-

Ans. Eye.

9. Which part of a flower forms the fruit?

Ans. Ovary.

10. The cells which result after fusion of gametes is called______.

Ans. Zygote.

13. Motion and time

1. Define speed?

Ans. The distance travelled by an object per unit time is called speed.

2. The basic unit of speed is:

Ans. Meter/second. 3. What type of motion a simple pendulum execute?

Ans. Oscillatory motion.

4. Mention which is the most common thing in almost all the clocks?

Ans. Periodic motion.

5. Name the axis that represents dependent variable?

Ans. Y-axis.

6. What is speedometer?

Ans. It is an instrument which indicates the speed of the vehicle when it is moving.

7. What isperiodic motion?

Ans. The motion which repeats itself after regular intervals of time is called periodic motion.

8. For what purpose odometer is used?

Ans. It is used for measuring the distance travelled by a vehicle.

9. What is a bar graph?

Ans. A diagram which shows information as thin rectangles of different heights is called a bar graph.

10. What is meant by uniform motion?

Ans. If an object moving along a straight line with constant speed then it is called uniform motion.

14. Electric current and its effects

1. Name any two effects of electric current?

Ans. 1) Heating effect 2) Magnetic effect

2. What is meant by a battery?

Ans. The combination of two or more cells is called a battery.

3. Name the device where magnetic effect of current is used?

Ans. Electric bell.

4. On which effect of electric current does electric iron works?

Ans. Heating effect.

5. Our body is a ______of electricity.

Ans. Good conductor.

6. What are MCBs?

Ans. Miniature circuit breakers.

7. Who discovered the magnetic effects of electric current?

Ans. Hans Christian oersted.

8. An electric cell produces electricity from the ______in it.

Ans. Chemicals stored.

9. The core of an electromagnet is made from______.

Ans. Iron.

10. The coil of wire contained in heater is known as______.

Ans. Element.

15. Light

1. The image formed by a concave lens is ------.

Ans. Virtual.

2. An image that cannot be obtained on a screen is called ------.

Ans. Virtual.

3. Convex lens is a ------lens.

Ans. Converging lens.

4. A virtual image larger than the object can be produced by a-

Ans. Concave mirror.

5. The light phenomenon in lens is ------.

Ans. Refraction.

6. What type of mirror is used in vehicles?

Ans. Convex mirror.

7. Which type of mirror can form a real image?

Ans. Concave mirror.

8. Which type of lens forms always a virtual image?

Ans. Concave lens.

9. There are ------types of spherical mirrors.

Ans. Two.

10. A prism splits light into ------colours.

Ans. Seven.

16. Water: A precious resource

1. On which date ‘world water day’ is celebrated?

Ans. 22nd march.

2. What percentage of earth’s surface is covered with water?

Ans. 71%

3. Mention the year which is celebrated as international year of fresh water?

Ans. 2003.

4. Water which falls from the clouds as rain or snow is called-

Ans. Precipitation.

5. The groundwater when collects between the layers of hard rocks is called-

Ans. Aquifer.

6. ‘Every Drop Counts’ is a slogan related to-

Ans. Importance of water.

7. Define infiltration?

Ans. The process of seeping of water in the ground is called infiltration.

8. What is water cycle?

Ans. The evaporation of water from oceans and its arrival back into oceans is called water cycle.

9. Water circulates through the water cycle in the three forms. Name them/

Ans. Solid, liquid, gas.

10. What is the source of ground water?

Ans. Rain.

17. Forest: Our lifeline

1. Forest protect the soil from erosion. (T/F)

Ans. True.

2. The plants and animals in a forest are not dependent on another. (T/F)

Ans. False.

3. Microorganisms act upon the dead plants to produce-

Ans. Humus.

4. Soil does not help forest to grow and regenerate. (T/F)

Ans. False.

5. Herbs form the------layer in the forest.

Ans. Lowest.

6. What are decomposers?

Ans. The microorganisms that convert the dead plants and animals into humus is called decomposers.

7. What is a food chain?

Ans. A sequence of living organism in which one organism feeds on another is called food chain.

8. Write a typical grassland food chain?

Ans. Grass --- Deer ---> Lion.

9. Write a typical food chain in a pond?

Ans. Algae - Small fish large fish. 10. The first link in all food chains are-

Ans. Green plants.

18. Wastewater story

1. Cleaning of water is a process of removing------.

Ans. Pollutants.

2. Wastewater released by houses is called------

Ans. Sewage

3. Dried------is used as manure.

Ans. Sludge.

4. Name two chemicals used to disinfect water?

Ans. Chlorine, ozone.

5. Write the full form of WWTP?

Ans. Wastewater treatment plant.

6. World water day is celebrated on------.

Ans. 22 March.

7. Protozoa is causative organism of which waterborne disease?

Ans. Dysentery.

8. Mention the common process of cleaning of wastewater?

Ans. Sewage treatment.

9. Name two things that can be made from sludge extracted during treatment of sewage?

Ans. Biogas and manure.

10. Name two inorganic impurities present in sewage?

Ans. Phosphates and nitrates.

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