Review Quiz-Physical Science

What is the leading explanation for how the universe began. What is this theory?

• Atomic theory    

• Atomos Theory

• Big Bang Theory

• Newton’s Law

He proposes that everything starts in a Primeval Atom. Who is this scientist?

• Edwin Hubble

• George Lemaitre

• Robert Wilson

• Vesto Slipher

Answer explanation

Appealing to the new quantum theory of matter, Lemaître argued that the physical universe was initially a single particle—the “primeval atom” as he called it—which disintegrated in an explosion, giving rise to space and time and the expansion of the universe that continues to this day.

A proof of the Big bang which caused the expansion of the universe. What is it?

• Redshift

• Cosmic Microwave

• Big Bang Nucleosynthesis

• Time Dilation

Answer explanation

The red shift indicates that the universe is expanding outward at an ever increasing rate of expansion.

Explanation:

When Hubble determined that the vast majority of stars and galaxies had a red shift, he created a major shift in the world view or paradigm that dominated science. The universe before Hubble was thought to have eternally existed, a so called steady state universe. After Hubble the presently observed universe could no longer be consider to be eternal.

A red shift in light indicates that the object is moving away from the observer. This is called the doppler shift. or effect. Stand by a railroad track and listen to the train whistle. As the train is moving toward you the sound is higher ( the waves are closer together) when the train passes the sound changes to a lower pitch ( the waves are further apart) blue light has waves that are closer together and red light has waves that are further apart.

The logic is that if the universe is observed to be moving apart it must have been closer together in the past. The big bang theory is that the universe is moving apart from a central point that once existed. In classical Big Bang theory this central point is proposed to have been a superdense ball of matter. The superdense ball was so dense that it was unstable and exploded. This explosion caused the universe that we presently observe.

In the color spectrum, what color has the longest wavelength?

• Blue

• Green

• Red

• Yellow

What color should a dying star looks like?

• White

• Pink

• Red

• Yellow

Answer explanation

Orange or Red stars have used up most of their Hydrogen fuel and are approaching the end of their lives.  Because the fuel (hydrogen burning - fusion) is running out, the waste product Helium has built up in the centre of the star.

As it expanded, this heat left behind a "glow" that fills the entire Universe. What is this glow?

• Infrared

• Microwave

• Radio Waves

• Gamma Rays

What do you call the big explosion of super massive stars?

• Red Giant

• Red Super Giant

• Supernova

• White Dwarf

What is the end point of an average star?

• Black Hole

• Neutron Star

• Supernova

• White Dwarf

Who proposed that matter is composed of four elements?

• Aristotle

• Empedocles

• Leucippus and Democritus

• Thales

He starts a revolution in scientific field that concepts and beliefs are learned and justified through experience.

• Antoine Lavoisier

• Francis Bacon

• JJ. Thompson

• Robert Boyle