This clear, approachable guide explains why the Earth is spherical, how gravity works, and how the planet moves through space. Learn how scientists prove the Earth is round, and how rotation and orbit shape our seasons, days, and years. Ideal for curious readers and students beginning their journey into astronomy and earth science.

Through straightforward explanations and practical demonstrations, this edition helps readers grasp big ideas without jargon. It connects everyday observations—like watching ships fade on the horizon or the changing night sky—to fundamental forces and motions that govern the planet.

Why the Earth is spherical and how that shape was determined using simple proofs.
How rotation flattens the poles and why the equator bulges.
How the Earth’s orbit around the sun creates seasons and the apparent motion of the sun and stars.

Ideal for readers of science primers, homeschoolers, and anyone seeking a solid, readable introduction to the Earth's form and movements.

"About this title" may belong to another edition of this title.

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We first started out as ?The Paperback Exchange,? a chain of physical bookstores where we would part exchange your beloved books for new stories to transport you to faraway places. However, as shopping started to evolve to online shops and marketplaces, we bid our stores goodbye to become ?PBShop.? This transition has only allowed us to blossom as we now ship thousands of titles to book lovers across the globe. We pride ourselves in being a community of local book lovers which allows our passion and devotion to shine in everything we do. In 2020 we not only celebrated our 20th birthday but our 1st birthday as being completely employee owned after becoming an E.O.T in September 2019. We are proud to be different and embrace standing apart on a book mountain by working from a virtual inventory which allows us to provide thousands of books that may be difficult to get for your bookshelf or your studies. Working with a number of different suppliers allows us to explore other avenues such as puzzles, sheet music and even stationery so we really do have something for everyone. Life is about being versatile in all realms of existence. If this is your first visit or you are a returning customer, we would like to welcome you to the PBShop family, for there is no friend as loyal as a book. We are a company who put our customers at the centre of everything we do as we understand the importance of reading because once you learn to read, you will forever be free. There are a whole lot of things in this world of ours that we are yet to explore, which is why we will forever inspire curious minds.

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