Question 3 :
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 4 :
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 5 :
_____ is defined as the splitting of a mature cell into two cells of the same type.
Question 6 : <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 7 :
______is defined as the production of a new individual from a body part like leaves, stems and roots.
Question 8 :
The fusion of male nucleus (male gamete) with that of egg cell (female gamete) is known as ______.
Question 9 :
The breaking of the body into two or more parts is called ______.
Question 10 :
Coconut is a large and heavy fruit.Statement is true or false.
Question 11 :
State true or false: The time period of a given pendulum is not constant.
Question 12 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb96f59b460d7261ec65.png ' />In the above figure, the time period of a simple pendulum is the time taken by it to travel from:
Question 13 :
Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.
Question 14 :
State the type of motion : Motion of the earth around the sun.
Question 15 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc15f59b460d7261ed03.png' />
The above figure shows the distance-time graph for the motion of two vehicles A and B. Which one of the following is moving faster?
Question 16 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb9af59b460d7261ec69.png ' />
In the above figure, a simple pendulum is oscillating between two points A and B. Is the motion of the bob uniform or non-uniform?
Question 18 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb94f59b460d7261ec63.png ' />
In the above figure, clock A has an hour and a minute hand, whereas clock B has an hour hand, minute hand as well as a second hand. Which of the following statement is correct for these clocks?
Question 19 :
Which of the following cannot be used for measurement of time?
Question 21 :
The image formed by a lens is always virtual, erect and smaller in size for an object kept at different positions in front of it. Identify the nature of the lens.
Question 22 :
A person stands in front of a plane mirror and looks at his image. Now, he touches his right ear. Which ear does his hand touch in the image?
Question 25 :
If the reflecting surface is on the inner side, the mirror is called ____.
Question 27 :
The outer surface of a flat steel plate acts as a ___ mirror.
Question 29 :
Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are respectively :
Question 30 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbdff59b460d7261ecbd.jpg' />
A Person places a lighted candle in front of a plane mirror. He tries to see the flame of the candle in the mirror. It appears as if a similar candle is placed behind the mirror. The candle, which appears behind the mirror, is the image of the candle formed by the mirror as shown in the above figure. The candle itself is the object. Now, he moves the candle to different positions in front of the mirror. He observes the images in each case. Will the images be upright in each case?
Question 32 :
State true or false:The process of breakdown of food in the cell with the release of energy is called cellular respiration.
Question 33 :
Earthworms and frogs breathe through their skin because of which the skin of both the organisms is
Question 36 :
Name the tiny pores in the leaves through which
exchange of gases takes place.
Question 37 :
State true or false:Plants carry out photosynthesis only during the day and respiration only at night.
Question 41 :
Fill in the blanks. Longer line in the symbol for a cell represents its ___________terminal.
Question 42 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc10f59b460d7261ecfc.png' />
From the above circuit, would any of the bulb glow when the switch is in the 'OFF' position?
Question 43 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc0df59b460d7261ecf9.png' />
Will the compass needle show deflection when the switch in the circuit shown by figure given above is closed?
Question 44 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc0ef59b460d7261ecfa.png' />
From the above circuit, what will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON position?
Question 46 :
State True or False. The combination of two or more cells is called a battery.
Question 48 :
State True or False. When current is switched 'on' in a room heater, it produces heat.
Question 49 :
State True or False. An electromagnet does not attract a piece of iron.
Question 50 :
State True or False. When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.
Question 53 :
Name the term used for removal of undigested food from our body.
Question 59 :
Name the structure which increases the surface area of the root for the absorbing of water.
Question 60 :
Read the following terms given below.
Root, hairs, xylem, urethra, arteries, kidneys, veins, atria, capillaries, heart, ureter, phloem, urinary bladder.
Group the terms on the basis of the excretory system in human.
Question 61 :
Explain why sewage is harmful to discharge untreated sewage into rivers or seas?
Question 64 :
Explain the function of bar screens in a wastewater treatment plant.
Question 70 :
A network of big and small pipes that are used to take away the wastewater, called _____, forming the _______?
Question 73 :
The decaying leaves and animal droppings in a forest enrich the __________.
Question 74 :
Explain how animals dwelling in the forest help it grow and regenerate.
Question 79 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbd9f59b460d7261ecb4.JPG' />
From the above image, identify the tree name?
Question 80 :
Which of the following are the products we get from forests?
