Short & Long Questions: The Planet Earth | Footprints Class 6: Book Solutions, Notes & Worksheets PDF Download

Short Answer Questions

Q1: What theory explains the birth of our universe about 15 billion years ago?
Ans: The Big Bang theory.

Q2: What is the hottest planet in the solar system?
Ans: Venus.

Q3: Name one constellation you can see in the night sky.
Ans: Ursa Major (the Great Bear).

Q4: What is the main source of heat and light for our solar system?
Ans: The Sun.

Q5: How do planets differ from stars in terms of producing light?
Ans: Planets do not produce their own light; they reflect the light they receive from the Sun.

Long Answer Questions

Q6: Explain the Big Bang theory and how it led to the formation of our universe.
Ans: The Big Bang theory suggests that about 15 billion years ago, all matter in the universe was concentrated in one mass. This super dense and hot mass eventually exploded with a big bang, scattering matter in all directions. The universe started to expand, creating more space and leading to the formation of galaxies, stars, and other celestial bodies.

Q7: Describe the unique features of the Earth that make it a special planet in our solar system.
Ans: Earth is often called the Blue Planet because it has a lot of water. It's the only planet where scientists believe life exists because it has all the essential elements for life. It rotates from west to east, has an atmosphere with oxygen, and a variety of ecosystems.

Q8: What are satellites, and how do they benefit us? Provide an example of India's satellite program.
Ans: Satellites are celestial bodies that revolve around planets. They are crucial for various purposes, including weather study, telecommunications, mapping, and experiments. India's Chandrayaan 1 was its first mission to the Moon, and it contributed valuable data about lunar conditions.

Q9: Explain the phases of the Moon and why it appears to change shape during the month.
Ans: The Moon has different phases, which occur due to the varying positions of the Sun and the Moon in their orbits. When the Moon appears to be growing, it's called the waxing period, and when it appears to be reducing, it's the waning period. This happens as the Sun lights up different parts of the Moon in its journey around the Earth.

Q10: Distinguish between meteoroids and meteorites. Provide examples of significant meteorite falls on Earth.
Ans: Meteoroids are chunks of rocky and metal debris in space. Some of them burn up when they enter the Earth's atmosphere, creating meteors or shooting stars. Larger fragments that survive and reach the Earth's surface are called meteorites. Examples of meteorite falls on Earth include those in Vladivostok (Russia), Barwell (Britain), Northern Ireland, France, Chelyabinsk (Russia), and Mahadeva, Bihar (India).