Class 5 Exam > Class 5 Notes > Social Studies for Class 5 > Worksheet: The Earth-Our World - 1
The Earth-Our World - 1 Class 5 Worksheet SST
Q1: Fill in the blanks
Q1: Fill in the blanks(i) Man first landed on moon on _____________________ .
(ii) In the continent of _____________________ no man has permanent home.
(iii) Our earth is more like an _____________________ than a sphere.
(iv) The _____________________ mountain separates Asia from Europe.
Q2: True & False
(i) The earth is a heavenly body.
(ii) The continent of Australia is made up entirely of islands.
(iii) All countries are parts of some continent.
(iv) Oceans are large bodies of water.
Q3: Look at the globe and answer the following:
(i) Which of the two hemispheres has greater land area?
(ii) Which two continents are spread over both hemispheres?
(iii) Why does the level of water in all the oceans remains the same?
(iv) Which continent lies only in the southern hemisphere?
(v) Which ocean surrounds the continent of Antarctica?
Q4: Answer the following questions in brief:
(i) Who sailed round the earth to prove that it is round and not flat?
(ii) What is a ‘grid’?
(iii) Which imaginary line divides the earth into two hemispheres?
(iv) In what ways are maps different from a globe?
You can find Worksheets Solutions here: Worksheet Solutions: The Earth-Our World - 1
The document The Earth-Our World - 1 Class 5 Worksheet SST is a part of the Class 5 Course Social Studies for Class 5.
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FAQs on The Earth-Our World - 1 Class 5 Worksheet SST
| 1. What are the different layers of the Earth? |  |
Ans. The Earth is composed of several layers. The outermost layer is the crust, followed by the mantle and the core. The crust is the thinnest layer and is divided into continental and oceanic crust. The mantle is the thickest layer and is made up of solid rock. The core is divided into the outer core, which is liquid, and the inner core, which is solid.
| 2. How does the Earth rotate and revolve? | |
Ans. The Earth rotates on its axis, which is an imaginary line that runs through the North and South Poles. This rotation causes day and night. The Earth also revolves around the Sun in an elliptical orbit. It takes approximately 365.25 days to complete one revolution, resulting in the change of seasons.
| 3. What causes earthquakes and volcanoes? | |
Ans. Earthquakes are caused by the sudden release of energy in the Earth's crust. This energy is accumulated due to the movement of tectonic plates, which are large pieces of the Earth's crust that float on the semi-fluid mantle. When these plates collide or slide past each other, it creates seismic waves that result in an earthquake.
Volcanoes are formed when molten rock, called magma, rises to the Earth's surface. This magma comes from the Earth's mantle and is forced out through cracks in the crust. The magma solidifies and builds up over time, forming a volcano. When the pressure becomes too great, the volcano erupts, releasing lava, gases, and ash.
| 4. What is the greenhouse effect and its impact on the Earth? | |
Ans. The greenhouse effect is a natural process that occurs when certain gases in the Earth's atmosphere trap heat from the Sun. These gases, including carbon dioxide and methane, act like a blanket, preventing some of the heat from escaping into space. This process helps to keep the Earth's temperature within a range suitable for life.
However, human activities, such as burning fossil fuels and deforestation, have increased the concentration of these greenhouse gases in the atmosphere. This enhanced greenhouse effect is causing global warming and climate change. The increased temperature can lead to melting ice caps, rising sea levels, extreme weather events, and disruptions to ecosystems.
| 5. How do rocks and minerals contribute to the Earth's formation? | |
Ans. Rocks and minerals are essential components of the Earth's formation. Rocks are made up of minerals, which are naturally occurring inorganic substances with specific chemical compositions and crystal structures. They play a crucial role in shaping the Earth's surface and its interior.
Through processes like weathering and erosion, rocks are broken down into smaller pieces, called sediments. These sediments can then be compacted and cemented together to form sedimentary rocks. Over time, intense heat and pressure can transform these rocks into metamorphic rocks. Additionally, the cooling and solidification of molten rock, or magma, can create igneous rocks.
The continuous cycle of rock formation and transformation, known as the rock cycle, plays a vital role in the Earth's geology and the development of its diverse landscapes.
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