This theory explains that the expansion of the universe began after the explosion of a singularity.

• Big Bang Theory

• Staedy-state theory

• Solar Nebula Hypothesis

• Oscillating Universe Theory

This theory suggests that the universe is continuously expanding, however, the density remains constant as it also continuously creates matter.

• Big Bang Theory

• Steady State theory

• Solar Nebula Hypothesis

• Oscillating Universe Theory

This theory explains that the universe has a never-ending cycle of expansion and contraction; this process causes the formation of another singularity then occurrence of another Big Bang.

• Big Bang Theory

• Steady-state theory

• Solar Nebula Hypothesis

• Oscillating Universe Theory

This theory explains that the solar system originated from a cloud of interstellar gas and dust which accumulated after the Big Bang.

• Big Bang Theory

• Steady-state theory

• Solar Nebula Hypothesis

• Oscillating Universe Theory

This is what is believed to be the origin of the Big Bang. It was hypothetically located in the middle of a black hole, then exploded due to intense heat.

• Cosmic Ball

• Singularity

• Primeval Nucleus

• Dark Matter

How old is our universe since it began its expansion?

• 13.8 Billion years

• 11.8 Billion years

• 4.6 BIllion years

• 6.6 Billion years

This is a model which shows that distances among galaxies increase due to expanding universe.

• Big Bang Model

• Steady-state Model

• Bread-raisin Model

• Atomic Nucleus Model

1.    It is being said that it was the “leftovers” after the big explosion. It is a radiation discovered by Penzias and Wilson that were present in space.

• Gamma Radiation

• Cosmic Radiation

• Infrared Radiation

• Ultraviolet Radiation

This is a law which explains that the farther away a galaxy is from the observer, the faster it appears to be moving away from the observer.

• Law of Gravity

• Hubble's Law

• Law of Orbit

• Law of Periods

How can you differentiate Big Bang Theory and Steady-state theory?

• In Big Bang, the density of matter decreases; while in Steady-state, the density of the matter remains constant.

• In Big Bang, the density of the matter remains constant; while in Steady-state, the density of matter decreases.