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Pits could be made indoors with a cushion and carpet floor or the earth pit which has no floor and the pit is made of earth and dirt.
earth quakes
Another word for ground could be earth, soil, or solid.
4 people, 84th floor, South Tower, escaping through stairways A.
The crust contains the ocean floor and also the continents on Earth.
They could help in creating new lithospheric (crust) plates. As in the case of divergent boundary, where new ocean floor is produced and expanded (sea-floor spreading).
The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.The ancient Romans had the hypocaust system of central heating. This was only practical for the first floor. If a second floor needed heating they used a brazier of hot coals.
The Sea Floor
When the old ocean floor is destroyed, it goes to Earth's mantle.
On Earth, the gravity of planet Earth keeps us on the floor.
Dinosaurs do not exist today because an asteroid hit the earth 65 million years ago. It threw a lot of dirt and dust up into the air that sunlight became dim. A lot of plants could not get enough light and died. The animals that ate those plants died. The dinosaurs that ate those plant eating animals died. All the dinosaurs died. Some plants and animals survived. Some plants lived on the forest floor. They were used to getting by with little light. Some seeds were used to staying alive for years until conditions became right for them to grow. Small birds survived. Small mammals survived. Insects survived. Fresh water fish survived. In salt water many animals did not survive, some did. Chalk producing coral did not survive, reef producing coral survived. It goes on.
Earth's crust is composed of the continents and the ocean floor.