Question 1 :
The correct combination of terms with reference to an animal cell is _____.
Question 2 :
Nucleus is separated from the cytoplasm by a membrane called the _____________.
Question 3 :
One of the most common applications of chemical effect of electric current is __________.
Question 4 :
Clearing of forests (by cutting down forest trees)over a wide area is called _______?
Question 5 :
Red Data Book is the source book which keeps a record of all the____________ animals and plants?
Question 6 :
A chapati maker is a machine which converts balls of dough into chapati’s. What effect of force comes into play in this process?
Question 7 :
Which force comes into play when you push a book on a table?
Question 8 :
In the iris, there is a small opening called the __________?
Question 9 :
Reflection from a smooth surface like that of a mirror is called ______ ?
Question 10 :
Complete the reaction, $ Iron (Fe) + Oxygen (O_2) + Water (H_2O) → ?$ ?
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d088f59b460d7261f30f.JPG' />
Observe the above image and name the causative agent of this disease.
Question 12 :
Water used for washing and for other household tasks can be reused for -
Question 13 :
State True or False.
Carbon monoxide is produced by complete burning of fuels such as coal, petrol, diesel.
Question 14 :
Which substance is used in refrigerators, air conditioners and aerosol sprays?
Question 15 :
In the following statements, the words in inverted commas are jumbled up. Write them in their correct form. Vehicles produce high level of pollutants like carbon dioxide, nitrogen oxides, 'nobrac moondexi' and 'mosek'.
Question 16 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0e6f59b460d7261f385.jpg' />
What conclusions can be drawn from the above graphs where Y and X axis represents height and age respectively?
Question 18 :
If the materials used for constructing a building were good conductors, do you think lightning will strike the building?
Question 19 :
Fill in the blank: Burning of wood and coal causes __________ of air.
Question 20 :
The number of oscillations per second of a vibrating object is called its time period. True or false ?
Question 21 :
Terrycot is made by mixing two types of fibres. Write the names of the fibres.
Question 23 :
There are two wires (called leads) attached to an LED. One lead is slightly longer than the other. TRUE or FALSE?
Question 25 :
Clearing of forests (by cutting down forest trees)over a wide area is called _______?
Question 26 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0cef59b460d7261f364.JPG' />
From the above image, Complete the following word puzzle with the help of clue. (5) Certain plants of the same kind grown on a large scale.
Question 27 :
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. Find the nature of the gas.
Question 28 :
Microorganisms have been used for the production of alcohol since ages. Is the statement correct ?
Question 29 :
State true or False. The planets look like stars and they do have light of their own.
Question 31 :
Do all plastics have the same type of arrangements of units?
Question 33 :
Paheli has heard that some of the endemic species may vanish. Is it true?
Question 35 :
State TRUE or FALSE: Cells are the basic structural units of living organisms.
Question 36 :
Indicate whether the following statement is True (T) or False (F): Amoeba has an irregular shape.
Question 39 :
State whether the statement is true or false : Migration refers to the movement of an organism or a group of organisms from its natural habitat to another place at a particular time every year.
Question 40 :
The source book that maintains an international list of all endangered animal and plant species is called -
Question 41 :
Give reasons that why aluminium foils are used to wrap food items.
Question 43 :
When a glass rod is rubbed with a piece of silk cloth, the rod :
Question 45 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0fdf59b460d7261f3a3.jpg' />
Boojho made the above sketch of the solar system. Is the sketch correct ? Yes/No
Question 47 :
Which is the the largest planet of the solar system ?
