nutrition in animals for class 7 Important questions

Most Important Questions

  Q 1 What do you understand by animal nutrition? 
  Q 2 Define digestion.  
  Q 3 Name the type of food and mode of feeding of the following animals: (a) Ant (b)Mosquito
  Q 4 Name the process of taking in food? 
  Q 5 Name the glands present inside the oral cavity. 
  Q 6 What helps our tongue to taste the food? 
  Q 7 What do you understand by alimentary canal or digestive tract? 0
  Q 8 What constitutes the Digestive System? 
  Q 9 What are the two components of the digestive system? 
  Q 10 What is the difference between milk teeth and permanent teeth? 
  Q 11 How many types of teeth are present in humans? Name them. 
  Q 12 Which teeth do you use for piercing and tearing? Write the number of these teeth. 
  Q 13 What is the function of premolars and molars? Write the number of both teeth in each jaw. 
  Q 14 List the functions of the tongue. 
  Q 15 How many pairs of salivary glands are present in humans and what is the function of saliva? 
  Q 16 What are the main steps of digestion in humans? 
  Q 17 Write short notes on ---   (a) The stomach (b) Liver 
  Q 18 What are villi? What is their function? 
  Q 19 What do you understand by rumen and rumination? 
  Q 20 Why do we get instant energy from glucose? 
  Q 21 Name the type of carbohydrate that can be digested by ruminants but not by humans. 
  Q 22 What is the mode of feeding in Python? 
  Q 23 Name the largest gland in the human body. 
  Q 24 Write a short note on structure and feeding of the amoeba. 
   Q 25 Write one similarity and one difference between the nutrition in amoeba and human beings. 
  Q 26 Draw labelled diagrams of ---    
           (a) Human digestive system                                                                           
           (b) Amoeba

Dimensional analysis practice worksheet

This post is about Dimensional analysis practice worksheet practice these problems and try to solve them in one hour.

Question 1 The parallax of a heavenly body measured from two points diametrically opposite on the equator of the earth is 1.0 minute. If the radius of the earth is 6400 Km, find the distance of heavenly body from the center of the earth in AU. Take 1AU=1.5×1011m.
Question 2 A screw gauge has a pitch of 1.0 mm and 200 divisions on the circular scale. Do you think it is possible to increase the accuracy of the gauge arbitrarily by increasing the number of divisions on the circular scale?
Question 3 Assuming that the frequency ($\nu$) of the vibrating string depends upon the load (F) applied , length of the string (l) and mass per unit length (m), prove that  
$\nu = \frac{1}{2l} \sqrt{\frac{F}{m}}$
Question 4 What are the dimensions of
(a) gravitational constant
(b) work
(c) angular velocity
(d) pressure
Question 5 Write the dimensions of a/b in the relation
Where F is force, x is distance and t is time.
Question 6 Check the correctness of the relation
$\rho =\frac{3g}{4\pi rG}$
Where symbols have usual meaning.
Question 7 The coefficient of viscosity ($\eta$) of a gas depends upon mass m, the effective diameter d, and mean speed v of the gas molecules. Use dimensional analysis to find the relation between them.
Question 8 The potential difference of V=20±1 Volt , when applied across a resistance gives a current of 2.5±0.5 ampere. Find the resistance with limits of error.
Question 9 Convert 4.29 light years into parsecs. Calculate the parallax of a star at the distance when viewed from two locations of earth six months apart in its orbit around the sun.
Question 10 In an experiment, on determining the density of a rectangular block, the dimensions of the block are measured with a Vernier calipers (with a least count of 0.01 cm) and its mass is measured with a beam balance of least count of 0.1 g. How do we report our result for the density of the block.
Question 11 It is required to find the volume of a rectangular block. A Vernier calipers is used to measure the length, width and height of the block. The measured values are  1.37 cm, 4.11 cm, and 2.56 cm respectively.

Answer the following questions

Question 1 What is relative error or percentage error?
Question 2 What is Parallax error?

Question 3 How errors are propagated or combined?

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