Groundwater can take 50 years to just traverse 1 km (0.6 mi).Įarth's land portion is generally divided into several, large, discrete landmasses termed continents. In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as ice, about two weeks in lakes and rivers, and less than a week in the atmosphere. If all the surface ice on earth fully melted, the sea level would rise about 70 m (230 ft). Of the 2.5% that is fresh, about two-thirds is frozen mostly locked up in the Antarctic ice sheets and mountain glaciers worldwide. Some 97.5% of the Earth's water is saltwater. Because of their immense size, the Pacific and Atlantic Oceans are generally divided at the equator into the North and South Pacific Oceans and the North and South Atlantic Oceans, thus creating seven major water bodies - the so-called 'Seven Seas.' The World Factbook recognizes and describes five oceans, which are in decreasing order of size: the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean. The former portion is divided into large bodies termed oceans. The surface of the Earth is approximately 70.9% water and 29.1% land. For the 21st century, the continued exponential growth in science and technology raises both hopes (e.g., advances in medicine and agriculture) and fears (e.g., development of even more lethal weapons of war). The planet's population continues to explode: from 1 billion in 1820 to 2 billion in 1930, 3 billion in 1960, 4 billion in 1974, 5 billion in 1987, 6 billion in 1999, and 7 billion in 2012. Which of these pertains to the North Pole?Įnter your email address to subscribe to this blog and receive notifications of new posts by email.Globally, the 20th century was marked by: (a) two devastating world wars (b) the Great Depression of the 1930s (c) the end of vast colonial empires (d) rapid advances in science and technology, from the first airplane flight at Kitty Hawk, North Carolina (US) to the landing on the moon (e) the Cold War between the Western alliance and the Warsaw Pact nations (f) a sharp rise in living standards in North America, Europe, and Japan (g) increased concerns about environmental degradation including deforestation, energy and water shortages, declining biological diversity, and air pollution (h) the onset of the AIDS epidemic and (i) the ultimate emergence of the US as the only world superpower. Class 5 Social Studies Chapter 1 Question Answers – MCQsĢ. (b) City Z (75° S) is colder as it is nearer to the South pole. (a) City Y (60° N) is colder as it is nearer to the North pole. Which city of the following is likely to be colder? We know that the nearer a place is to the poles, the cooler it is likely to be.

If a place has a latitude of 10° N, is it in the Northern or Southern Hemisphere?Īnswer: The place is located in the Northern hemisphere.ĥ. Why are latitudes and longitudes drown on the globe?Īnswer: The longitude between the poles running through the Royal Observatory at Greenwich in London (0°) is called the Prime Meridian or the Greenwich Meridian.Ĥ. It is used for the study of the Earth, and- to know the shape and location of the continents, oceans, seas, countries, and cities.Ģ. Arctic CircleĬlass 5 Social Studies Chapter 1 Question Answers Class 5 Social Studies Chapter 1 Question AnswersĪnswer: Globe is a small model of the Earth. Class 5 Social Studies Chapter 1 Question Answers – Match the columns 1. The Meridian marked by 0° is called the Prime Meridian. The latitude marked by 23.5° S is known as the Tropic of Capricorn.Ħ. On a globe, the lines running between two poles are called longitude or meridians.ĥ. Latitudes are the lines that run parallel to the Equator.Ĥ. The Earth is dived into two imaginary hemispheres along an imaginary line called the Equator.ģ. The Earth rotates about an imaginary line called the axis.Ģ. Class 5 Social Studies Chapter 1 Question Answers Class 5 Social Studies Chapter 1 Question Answers Fill in the blanksġ.

These lines combine and make a network called the global grid. Latitudes and longitudes are imaginary and important reference lines used to find the location of any place on the globe. A globe is a small model of the Earth and it is used to study the Earth. Answers are precise and easy to understand. Class 5 Social Studies Chapter 1 Question Answers include complete exercises and extra important questions related to Globe.

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