Question 2 :
Which country's sheep are known best to yield the best wool?
Question 5 :
Eggs of the female silkwom moth are incubated until they hatch and become larvae called________
Question 7 :
The female silk moth lays eggs, from which hatch larvae which are called
Question 8 :
From what type of health problems do the workers suffer while working in a wool industry ?
Question 11 :
An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response .
Question 12 :
When an electric current flows through a wire, it behaves like a magnet. State true or false .
Question 16 :
True or False. The compass needle gets deflected when the current flows in a nearby wire.
Question 18 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbcbf59b460d7261eca2.jpg' />
A person makes the circuit as shown in the above figure. However, he replaces the cell with a battery of four cells. Also, in place of the nichrome wire, he ties a thin strand of steel wool. (The steel wool is commonly used for cleaning utensils and is available in grocery shops.) If there are any fans in the room, he switches them off. Now, he passes the current through the circuit for sometime. Does the strand of steel wool melt and break?
Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbcdf59b460d7261eca4.jpg' />
A person takes the cardboard tray from inside a discarded matchbox. He wraps an electric wire a few times around the cardboard tray. Then, he places a small compass needle inside it. Now, he connects the free ends of this wire to an electric cell through a switch as shown in above figure. He notes the direction in which the compass needle is pointing and brings a bar magnet near the compass needle. He moves the switch to the ‘ON’ position. Move the switch back to the ‘OFF’ position. Does the compass needle come back to its initial position?
Question 20 :
Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also made an electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract more pins?
Question 21 :
Name a natural indicator which gives pink colour in basic solution.
Question 24 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb49f59b460d7261ec15.jpg' />
The above figure shows three test tubes A,B and C with different liquids. What will you observe when you put a few drops of phenolphthalein solution to test tube B?
Question 25 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb45f59b460d7261ec0f.jpg' />
The above figure shows three test tubes A,B and C with different liquids. What will you observe when
you put a piece of blue litmus paper in test tube C?
Question 27 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb49f59b460d7261ec14.jpg' />
The above figure shows three test tubes A,B and C with different liquids. What will you observe when you put a few drops of phenolphthalein solution to test tube C?
Question 29 :
What is responsible for increase in temperature during a neutralisation reaction?
Question 30 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb4ef59b460d7261ec18.PNG' />
The above figure shows solutions taken in test tubes A,B,C and D. What colour is expected when a piece of red litmus paper is dropped in test tube B? Nature of solution B is basic.
Question 33 :
The branchy part of a tree above the stem is known as
Question 38 :
Fill in the blank: The temperature of boiling water cannot be measured by a ____________ thermometer.
Question 39 :
Fill in the blanks: Heat flows from a ______ surface to ______ surface.
Question 40 :
The materials which allow heat to pass through them easily are __________________ of heat.
Question 41 :
Clothes of ______________ colours absorb more heat better than clothes of light colours.
Question 45 :
Four arrangements to measure temperature of ice in beaker with laboratory thermometer are shown in options (a, b, c and d). Which one of them shows the correct arrangement for accurate measurement of temperature ?
Question 46 :
Name the mode of nutrition with respect to the organism: Mango Tree
Question 48 :
Which among the following is(are) the advantages of growing many fruits and vegetable crops inside large green houses?
Question 49 :
In the absence of which of the following will photosynthesis not occur in leaves?
Question 50 :
Which of the following raw material is available in the air for photosynthesis?
Question 51 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb7df59b460d7261ec46.PNG ' />
In the above figure, a jug is placed facing a plane mirror. What is the distance between image of jug and mirror?
Question 53 :
Image formed wil always be virtual, erect and diminished in __________ mirror.
Question 55 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb88f59b460d7261ec53.JPG' />
In the above figure, 6 is ______ in colour.
Question 56 :
We can obtain an enlarged and erect image by a convex mirror.
Question 57 :
A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use?
Question 58 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbddf59b460d7261ecba.jpg' />
A person takes a torch covers its glass with a chart paper which has three narrow slits as shown in Figure above. He spreads a sheet of chart paper on a smooth wooden board and fixes a plane mirror strip vertically on the chart paper. Now, he directs the beam of light on the mirror from the torch with slits. He places the torch in such a way that its light is seen along the chart paper on the board. Now, he adjusts its position so that the light from the torch strikes the plane mirror at an angle. Now, he moves the torch slightly to either side. Does he find any change in the direction of reflected light?
Question 60 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbdbf59b460d7261ecb7.jpg' />
Boojho looked at a lighted candle first through a straight pipe and then through a bent pipe as shown in the figure. Why was Boojho not able to see the candle flame through a bent pipe?
Question 61 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbeaf59b460d7261eccb.jpg' />
A person takes a stainless steel spoon. He brings the outer side of the spoon near his face and looks into it as shown in the above figure. Is this image different from what he will see in a plane mirror?
Question 62 :
The ratio of size of image to the size of object is called:
Question 64 :
We can obtain a real, enlarged and inverted image by a concave mirror.
Question 65 :
____ usually appears when sun is low in the sky after rains.
Question 68 :
The inner wall of the small intestine has many finger-like outgrowths called _____.
Question 71 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb93f59b460d7261ec61.png ' />
In the above figure, a foot ball ground is given. Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given above as figure. Is the motion between 0 to 4 minutes uniform or nonuniform?
Question 72 :
State whether the statement is correct or not : Distance between two cities is measured in kilometres.
Question 73 :
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 a.m. At 08:50 a.m., the odometer reading has changed to 57336.0 km. What is the distance covered by the car during this time?
Question 74 :
State true or false: The speed of a train is expressed in m/h.
Question 75 :
The distance between two stations is 240 km. A train takes 4 hours to cover this distnace. Calculate the speed of the train.
Question 76 :
Distance between Bholu’s and Golu’s house is 9 km. Bholu has to attend Golu’s birthday party at 7 o’clock. He started from his home at 6 o’clock on his bicycle and covered a distance of 6 km in 40 minutes. At that point he met Chintu and he spoke to him for 5 minutes and reached Golu’s birthday party at 7 o’clock. Calculate his average speed for the entire journey
Question 77 :
If we denote speed by S, distance by D and time by T, the relationship between these quantities is______.
Question 78 :
A spaceship travels 36,000 km in one hour. Express its speed in km/s.
Question 79 :
State whether the statement is correct or not : The speed of a train is expressed in m/h.
Question 80 :
A bus travels 54 km in 90 minutes. The speed of the bus is_____.
Question 81 :
State the type of motion : Pedals of a bicycle in motion.
Question 82 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb91f59b460d7261ec5f.PNG ' />
Given above as figure is the distance-time graph of the motion an object. What is the average speed of the object?
Question 84 :
Rockets, launching satellites into earth's orbit, often attains speeds up to 8 km/s. On the other hand, a tortoise can move only with a speed of about 89 cm/s. Calculate how fast is the rocket compared with the tortoise.
Question 85 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb8ff59b460d7261ec5d.PNG ' />
Given above as figure is the distance-time graph of the motion an object. What will be the distance travelled by the object in 12 s?
Question 86 :
Which of the following statements is incorrect for a chemical reaction?
Question 90 :
State true or false: Iron and rust are the same substances.
Question 92 :
Can you reverse back the process of rusting by some simple method?
Question 93 :
A change in which only the physical properties af any substance get changed and no new substance is formed is called as.
Question 95 :
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust . Is rust different from iron?
Question 98 :
Boojho had the following parts of a rose plant-a leaf, roots, a branch, a flower, a bud and pollen grains. Which of them can be used to grow a new rose plant?
Question 99 :
The transfer of pollen grains of a flower to the stigma of same flower or that of a different flower of the same kind is called ______.
Question 100 :
_____ is defined as the splitting of a mature cell into two cells of the same type.
Question 101 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc1bf59b460d7261ed0a.jpeg' />
In the above figure, which type of pollination does the figure indicate?
Question 102 :
______is defined as the production of a new individual from a body part like leaves, stems and roots.
Question 103 :
The fusion of male nucleus (male gamete) with that of egg cell (female gamete) is known as ______.
Question 104 :
The breaking of the body into two or more parts is called ______.
Question 105 :
Coconut is a large and heavy fruit.Statement is true or false.
Question 109 :
Which of the following is the main respiratory organ in humans?
Question 110 :
Do we exhale only carbon dioxide or a mixture of gases along with it?
Question 112 :
State true or false: Upper layer of the soil is dark in colour.
Question 113 :
A vertical section through different layers of the soil is called the ____.
