Skip to main content

Wind, storms and cyclones class 7 solved Quesion



Wind Storm and Cyclone :Natural Phenomena: 7th class Hots Questions
Question: 1. Why are people advised not to stand near fast moving train?
Ans: When train moves with high speed it creates region of lower pressure . This low pressure push man towards the train

Question: 2. Why are holes made in huge hoardings? Explain their usefulness.

Ans: Holes are made in huge hoardings to reduce air pressurecausing it to flutter or blown away.

Question: 3. in winter regions near, why does wind blow from land to sea?
Ans:. In winter the sea become warmer quickly than the land. So In winter monsoon blows from land to sea

Question: 4. Why are things colorful in appearance?

Ans: The colour of object is colour that is reflected. Thus different coulor makes things colourfull.


Question: 5. Fill the missing word in the blank spaces in the following statements:

(a) Wind is moving air.
(b) Winds are generated due to uneven heating on the earth.
(c) Near the earth’s surface warm air rises up whereas cold air comes down.
(d) Air moves from a region of high pressure to a region of low pressure.

Question: 6. Suggest two methods to find out wind direction at a given place.

Answer: Two methods to find out wind direction at a given place are:

(a) An instrument called anemometer can be used to find the direction and speed of the wind.

(b)  Hold a strip of paper outside. The direction in which the paper is blowing is the direction of the flow of  the wind.

Question: 7. State two experiences that made you think that air exerts pressure.
Answer: Two experiences that made us think that air exerts pressure are:

(a) . Whiling cycling against the direction of the wind, it is difficult to ride. It shows that the air exerts pressure.

(b) While rowing a sailboat in the direction of the wind, it is always easier to row and while rowing a sailboat  against the direction of the wind, it is very difficult to row. It also shows that the air exerts pressure.

Question: 8. You want to buy a house. Would you like to buy a house having windows but no ventilators?   Explain your answer.

Answer: No, I would not like to buy a house having windows but no ventilators. Warm air rises up and  cool air comes downward. So, to make a stream of cool and fresh air to continuously flow to the house through the windows, there must be some ventilators in the upper part of the wall.

Question: 9. Explain why holes are made in hanging banners and hoarders.

Answer: Holes are made in hanging banners and hoarders to allow air to pass through them as a result of  which there will be less pressure of air on the banners or hoarders. Unless it is done, these may be uprooted  or distorted due to the pressure of the air.


Question:10 How will you help your neighbours in case cyclone approaches your village/town?
Answer:
(a) I will help my neighbours in case cyclone approaches my village/town by the following ways.

(b) I will help my neighbours in shifting their household articles, domestic animals etc to a safe place.

(c) I will provide phone numbers of all emergency services like police, fie brigade and medical centers.

(d) I will give them safety advice like avoiding driving on roads through standing water, not touching wet  switches etc.   See full post 

7th Wind Storm and Cyclone Living science question answer Download File


Wind, storms and cyclones class 7 solved Quesion                   Download File

Comments

CBSE ADDA :By Jsunil Sir : Your Ultimate Destination for CBSE Exam Preparation and Academic Insights

Living science ratna sagar class 6 solutions

Ratna sagar living science 6 answers by jsunil. Class6 Living science solution Term-1 Living Science Solution chapter-1 Source of food Download File Living Science Solution chapter-2 Component of food Download File Living Science Solution chapter-3 Fibre to fabric Download File Living Science Sol ch-4 Sorting of material into group Download File Living Science Soln ch-5 Separation of substance Download File Living Science Solution chapter-6 Change around Us Download File Living Science Solution ch-7 Living and Non Living Download File Living Science Solution ch-8 Getting to Know Plants Download File Living Science Sol ch-9 The Body and Its movements Download File Visit given link for full answer Class6 Living science solution Term-II

Class 10 Chapter 02 Acid Bases and Salts NCERT Activity Explanation

NCERT Activity Chapter 02 Acid Bases and Salt Class 10 Chemistry Activity 2.1 Indicator Acid Base Red litmus No Change Blue Blue Litmus Red No change Phenolphthalein Colourless Pink Methyl Orange Pink   Yellow Indictors are substance which change colour in acidic or basic media. Activity 2.2 There are some substances whose odour changes in in acidic or basic media. These are called olfactory indicators. Like onion vanilla, onion and clove. These changes smell in basic solution. Activity 2.3 Take about 5 mL of dilute sulphuric acid in a test tube and add few pieces of zinc granules to it. => You will observe bubbles of hydrogen gas on the surface of zinc granules. Zn + H2SO4 --> ZnSO4 + H2 => Pass the Hydrogen gas through the soap solution. Bubbles formed in the soap solution as Hydrogen gas it does not get d...

Class 10 Metal and Non MetalsChapter 03 NCERT Activity Solutions

X Class 10 NCERT Activity Explanation Class 10 Metals and Non Metals Activity 3.1 Page No. 37 Take samples of iron, copper, aluminium and magnesium. Note the appearance of each sample. They have a shining surface. Clean the surface of each sample by rubbing them with sand paper and note their appearance again. They become more shiny. => Freshly cut Metal have shiny surface Activity 3.2 Page No. 37 Take small pieces of iron, copper, aluminium, and magnesium. Try to cut these metals with a sharp knife and note your observations. They are very hard to cut. Hold a piece of sodium metal with a pair of tongs and try to cut it with a knife. Sodium can be cut easily with knife. Hence K and Na are soft metal cut with knife Activity 3.3 Page No. 38 Take pieces of iron, zinc, lead and copper try to strike it four or five times with a hammer. These metals are beaten into thin sheet on hammering. This property of metal is called malleability and metals are called malleable. Activity 3.4 Page ...

Class 09 Atoms and Molecules Numerical Problem based on Law of chemical Combination(Solved)

Class 09 Atoms and Molecules Numerical Problem based on Law of chemical Combination Law of conservation of mass Law of constant proportion Empirical formula 1. If 10 grams of CaCO 3 on heating gave 4.4g of CO 2 and 5.6g of CaO, show that these observations are in agreement with the law of conservation of mass.(Based on Law of conservation of mass) Solution:  Mass of the reactants = 10g ;  Mass of the products = 4.4 + 6.6g = 10g Since the mass of the reactants is equal to the mass of the products, the observations are in agreement with the law of conservation of mass. 2. 1.375 g of cupric oxide was reduced by heating and the weight of copper that remained was 1.098g.  In another experiment 1.179 g of copper was dissolved in nitric acid and the resulting copper nitrate was converted into cupric oxide by ignition . The weight of cupric oxide formed was 1.476 g. which law of chemical combinations does this data state? Solution: in first experiment: Copper oxide = 1....

Structure of Matter class07

The language of chemistry class 7 Basic science soled questions. Q. What is chemistry? Ans: Chemistry is a branch of science in which we study the composition, structure, properties and change of matter. Q. What is matter? Ans: Anything that is around us having some mass and occupies space is called matter. Q. What are the different classifications of matter? Ans: Matters are classified into element, compound and mixture. Q. What is element? Ans: Elements are the purest form of substance (matter) made up of same kinds of particles. The smallest unit of element is an atom. eg. Hydrogen, oxygen, carbon. Q. What is compound?            See full post   The language of chemistry class 7 Basic science Class 07 Basic sciences Chapter the Language of Chemistry A. Answer these questions 1. What does the formula of a substance tell us? Answer: Formula of a compound or an element represents the name and number of atoms present ...