I believe you are confusing "horizontal" with "vertical". "Vertical" means "from top to bottom", or "upright". "Horizontal" means "from left to right", or "lying".
Not sure what you mean... They are horizontal, not vertical, meaning they lie flat on the Earth.
I don't think they do.
earth and continents
vertical/horizantal
7 continents on the earth
Earth's axis is tilted to about 11 degrees from the vertical.
The land masses that the Earth is divided into are called continents. There are seven continents on Earth: Africa, Antarctica, Asia, Europe, North America, Australia, and South America.
Nouns in the sentence are: earth, continents.
7 Continents on the Earth
They are on the crust of the earth.
mantle
There are seven continents on mother earth