Why are no rocks found that date from the first 800 million years of Earth's existence?

Describe the penisular plateau of India.

An ancient rock sample has 2 pg/kg of a radioactive isotope. Modern formations of this type of rock have 64 pg/kg of this same isotope. If the half-life of this isotope is 30 million years how old is the ancient rock sample

Say that your friend is standing on Earth, which is warping spacetime. He flashes a pulse of light into space once every second (frequency of 1 pulse per second).

Weather is affected by the amount of oxygen or water in the air

Which of the following is NOT a factor that has contributed to deforestation in the Caribbean? A) provide fuelB) population growthC) the accidental introduction of exotic caterpillars that killed forests throughout the regionD) sugarcane

List in order of relative size, from smallest to largest. Sun Jupiter Milky Way Universe Our Solar System

The four main systems of the Earth are

What is a famous part of the savanna in Kenya and Tanzania called?

Match each place with the region in which it is located. Mount Scott Rich Mountain Tallgrass Prairie Reserve Alabaster Caverns Black Mesa Ouachita Mountains Gypsum Hills Wichita Mountains High Plains Sandstone Hills

What is the name for any side of a building that is intended to be looked at?