Question 1 :
Under a microscope Paheli observes a cell that has a cell wall but no distinct nucleus. The cell that she observes is
Question 3 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d04cf59b460d7261f2c2.PNG' />
The cell shown in the above image represents
Question 4 :
There are several small scattered coloured bodies in the cytoplasm of the cells. What are those?
Question 5 :
The entire content of a living cell is known as _________
Question 6 :
Of the following parts of a cell listed below, name the part that is common to plant cell, animal cell and a bacterial cell.
Question 9 :
I am like a policeman. I do not allow anything and everything to get in and out of the cell. Who am I?
Question 10 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d04af59b460d7261f2c0.PNG' />
The table given above has certain terms and four blank spaces named A, B, C and D. From the options given choose the correct combination of terms
Question 11 :
Phosphorus is a very reactive non-metal. It catches fire if exposed to air, to prevent the contact of phosphorus with atmospheric oxygen, it is stored in _______
Question 12 :
Some metals react with water to produce metal hydroxides and hydrogen gas. Generally, nonmetals do not react with water.
Question 15 :
Why Immersion rods for heating liquids are made up of metallic substances?
Question 16 :
Which of the following is related to the uses of copper?
Question 17 :
Which of the following is related to the uses of gold?
Question 19 :
Which of the following is related to the uses of iron?
Question 22 :
Give reasons that why sodium and potassium are stored in kerosene.
Question 23 :
Fill in the blank: Metals react with acids to produce _____ gas.
Question 25 :
Fill in the blanks: Based on malleability, metals are _____ and non-metals are _____ in nature.
Question 26 :
The to and fro motion of an object is known as _______ motion.
Question 27 :
Loudness of sound is proportional to the square of the amplitude of the vibration producing the sound. State true or false.
Question 29 :
Time taken by an object to complete one oscillation is called __________.
Question 31 :
Presence of excessive or unwanted sounds in the environment is called ______
Question 32 :
A pendulum oscillates 40 times in 4 seconds. Find its frequency.
Question 34 :
For human ears, the audible range is 20 Hz to 20,000 Hz. State true or false.
Question 38 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0f3f59b460d7261f396.png' />
From the above image, fill in the crossword puzzle using the following hint: Endocrine gland attached to brain
Question 39 :
Release of sex hormones is under the control of a hormone secreted from the __________.
Question 40 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0e4f59b460d7261f383.jpg' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1ad578c526e972caf07f.jpg' />
Use the equation in the above image and answer. A boy is 9 years old and 120 cm tall. At the end of the growth period he is likely to be..?
Question 42 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d096f59b460d7261f321.PNG' />
In the above figure mark the positions of the endocrine glands which release the hormones that prevents diabetes.
Question 43 :
Choose the correct word for the given clue. Clue - Secretion of endocrine glands.
Question 44 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0e3f59b460d7261f381.jpg' />
The above chart gives the average rate of growth in height of boys and girls with age. The figures in columns 2 and 3, give the percentage of the height a person has reached at the age given in column 1.What is the probable % full height of a boy, by the age 11?
Question 45 :
Name the hormone which would be released during the following situations:development of tadpole to frog.
