हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

State Whether the Following is True Or False. Coal Takes Millions of Years to Form. - Geography

Advertisements
Advertisements

प्रश्न

State whether the following is True or False.

Coal takes millions of years to form.

विकल्प

  • True

  • False

MCQ
सत्य या असत्य
Advertisements

उत्तर

True

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 11: Renewable and Non-renewable resources - True or False

APPEARS IN

ऑक्सफोर्ड यूनिवरसिटि प्रेस Voyage Geography [English] Class 7
अध्याय 11 Renewable and Non-renewable resources
True or False | Q 4

संबंधित प्रश्न

 Name two energy sources that you would consider to be renewable. Give reasons for your choices.


"The calorific value of cooking gas (LPG) is 50 kJ/g". What does it mean? 


Why is the leakage of LPG detected easily although it is odourless? State the steps to be taken in case its leakage is detected in the kitchen.


The energy in petrol originally came from the sun. Explain how it got into petrol. 


What should be the minimum wind speed for the satisfactory working of a wind-powered electric generator?


Fill in the following blank with suitable word:       

Biomass is another form in which ........... energy manifests itself.


Why is biogas considered an ideal fuel for domestic use?


 What are the raw materials used for making biogas?


The constituent of biogas which makes it an excellent fuel is:

(a) butane
(b) methane
(c) propane
(d) ethane


The source of energy of the sun is:

(a) conversion of hydrogen gas into helium
(b) conversion of carbon fuel into carbon dioxide
(c) burning of hydrogen gas present in the sun
(d) disintegration of uranium into barium and krypton


The world's known coal reserves are expected to last for about:

(a) 200 years
(b) 400 years
(c) 500 years
(d) 100 years


What are non-renewable resources of energy? Give two examples of such resources.


Fill in the blank

Coal, petroleum, and natural gas are _________fuels.


State whether the following is True or False.

China, the USA, and Spain are major producers of wind energy.


State whether the following is True or False.

The Sardar Sarovar Dam is built on the river Narmada.


Why are fossil fuels called non-renewable sources of energy?


Choose the odd one:


Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?


Coal is one of the ______ used to cook food.


Fill in the blanks and complete the story.

About 300 million years ago, the earth had dense ______ in low lying wetland areas. Due to natural processes like ______, these forests got buried under the ______. As more ______ deposited over them, they were compressed. The ______ also rose as they sank deeper and deeper. Under high ______ and high ______, dead plants got slowly converted into coal.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×