Origin, Composition, and Materials of the Earth

It is theory which states that the universe expanded from a tiny, dense and hot mass to its present size and much cooler state.

• Oscillating Universe Theory

• Steady State Theory

• Big Bang Theory

• Creationist Theory

He states that the central fire being identified by Philolaus is actually the Sun which is the center of the universe.

In which era did the the first 25 elements of the Periodic Table were created.

• Era of Nuclei

• Era of Nucleosynthesis

• Planck Era

• Particle Era

The idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planet

• Nebula Theory

• Planetesimal Theory

It is a large mass of hydrogen and helium gases that constantly “burn” and re-generate, giving off heat energy and light.

A set of interconnected components that are interacting to form a unified whole.

It is the largest reservoir of freshwater available to humans.

Which of the following components of the atmosphere are responsible for the air that people breathe and trap outgoing infrared radiation to keep Earth warm?

• Major components such as Nitrogen and Oxygen

• Variable components such as Water Vapor and Aerosols

It is the component of the atmosphere that protects Earth from the harmful ultraviolet rays of the sun.

This is the layer of the atmosphere where asteroids and meteors burn up.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere