Definition: The gases surrounding the Earth or any astronomical body.

Alright class, settle down now, let’s take a look, At a word that’s important, in a scientific nook! We’re talking about “atmosphere,” it’s true, Let's break it down for me and you. The dictionary’s right, you see, “The gases surrounding Earth, for you and me!” Think of it like a blanket, soft and grand, Holding us close, throughout the land! It’s made of air – nitrogen and oxygen too, Plus other gases, a wonderful crew! From clouds up high to breezes low, The atmosphere helps things grow. It protects us from the sun's bright ray, And keeps our planet safe each day! So "atmosphere" means layers in the air, A vital part of everywhere! Do you have any questions, class so bright?

Definition: A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter .

Alright class, settle down, let’s take a look! Today we’re tackling the word “sphere,” it's quite a treat. The dictionary gives us clues, oh so sweet! It says: "A regular three-dimensional object… every cross-section is a circle…" Let's break that down, nice and clear, Like thinking of a ball, held ever near. Imagine you slice it, layer by layer, Each cut you make, a circular prayer! No matter where you cut, it’s round you see, A perfect circle - eternally free! And then it says, “the figure described… by the revolution of a circle about its diameter.” Now that's a bit more complex, I agree, but let's simplify! Think of a wheel, spinning with glee, That circular shape, for all to see. If you roll it out, so smooth and grand, A sphere is formed – across the land! The diameter is the distance through, From one side to the other, it’s true. So a sphere is round, perfectly neat, With circles everywhere, oh so complete! Do you have any questions? Don't be shy, Let’s explore this shape and reach for the sky!