Class 5 SST Question Answers - The Earth-Our World

Q1: What are the names of the days of the week that are derived from heavenly bodies, and which heavenly bodies do they represent?
Ans: The names of the days of the week derived from heavenly bodies are Ravivar (Sunday, representing the Sun), Mangalvar (Tuesday, representing Mars), Shukravar (Friday, representing Venus), and Shanivar (Saturday, representing Saturn).

Q2: How did the Earth appear when humans first landed on the Moon?
Ans: When humans first landed on the Moon on July 19, 1969, they saw the Earth as a shining spherical ball, much like how we see other heavenly bodies from Earth.

Q3: Why does the Earth appear flat to us in our daily lives?
Ans: The Earth appears flat to us in our daily lives because we can only see a very small part of it at any given time. However, it should be noted that the Earth is not exactly flat; it's more like an orange and slightly flat at the poles.

Q4: How many continents are there on Earth, and which one is the largest?
Ans: There are seven continents on Earth. Asia is the largest among them.

Q5: Which continent is India a part of, and what are continents divided into?
Ans: India is a part of the continent of Asia. Continents are divided into smaller units called countries.

Q6: Name the oceans on Earth and explain why seawater is salty.
Ans: The oceans on Earth are the Indian Ocean, Pacific Ocean, Atlantic Ocean, Arctic Ocean, and Southern Ocean. Seawater is salty because it contains dissolved salts and minerals that have accumulated over time from various sources, including rivers and volcanic activity.

Q7: How are continents and oceans represented on a globe, and what is the significance of a globe?
Ans: Continents and oceans are represented on a globe, which is a spherical model of the Earth's surface. A globe helps us visualize the distribution of land and water on Earth and understand the relative sizes of continents. It also aids in determining the shortest routes for travel between different parts of the world.

Q8: What are latitudes and longitudes, and what do they help us with?
Ans: Latitudes are imaginary lines that run east-west and are marked from 0° to 90° N/S. Longitudes are imaginary lines that run north-south and are marked from 0° to 180° E/W. Latitudes help us understand the Earth's climate zones, while longitudes help us determine locations and time zones.

Q9: Explain the concept of a grid on a globe and how it helps us locate places.
Ans: A grid on a globe is formed by intersecting latitude and longitude lines, creating squares or rectangles. Knowing the latitude and longitude of a place helps us easily locate it on the globe. For example, Pondicherry in India is near latitude 12° N and longitude 80° E.

Q10: How do latitudes and longitudes influence our understanding of the Earth's geography?
Ans: Latitudes influence the climates of different regions on Earth, while longitudes help us determine time zones and accurately locate places on the globe. Together, they provide valuable information for studying the Earth's lands and people.