The Effect of the Earth’s Rotation & Revolution

The Effect of the Earth’s Rotation & Revolution When watching the stars at night, they do appear to move very slowly.  This is because the Earth is constantly moving. The Earth completes one “rotation” every twenty-four hours.  A rotation is when the planet spins around once. The Earth rotates counterclockwise; this is why the Sun “rises”…

Other Objects in the Solar System

–          Since the universe is so incredibly large, astronomers (scientists who study space) are constantly discovering new objects in the universe. –          Even our solar system is incredibly large and contains countless objects. PLANETS AND THEIR MOONS –          Planets are only some of the objects in our solar system. –          Most of the planets (6…

Where are Active Volcanoes?

Volcanoes formed at certian locations because they were along plate boundaries, which provide the ideal circumstances for magma formation and its subsequent eruption. At subduction boundaries the lithopsheres collide and the denser plate is pulled down into the mantle. This introduces water into the asthenosphere which lowers melting temperature and allows the less dense magma…

Chapter 4 LAB Activity: Eratosthenes and the Earth’s Circumference Answers

Introduction Eratosthenes, a Greek geographer (about 276 to 194 B.C.), made a surprisingly accurate estimate of the Earth’s circumference. The legend follows that Eratosthenes used a deep vertical well near Syene, in southern Egypt which was entirely lit up by the sun at noon once a year as the basis of his calculations. He reasoned…

A Plate Tectonics Flip Book Answers

Around 190 million years ago, Pangaea began to break up. The breakup resulted in two landmasses: Laurasia, the northern group of continents, and Gondwanaland, the southern group of continents; Gondwanaland included South America, Antarctica, Australia, Africa, and India. Breakups! North America: 130 mya Australia: 50 mya India: 90 mya Europe: 30 mya Antarctica: 50 mya…