Unit 1: Astronomy, Earth's Formation, Layers & Subsystems

Who proposed the Big Bang Theory?

• Georges Lemaître

• Hannes Alfvén

• Thomas Gold, Hermann Bondi, Fred Hoyle

Who backed up Georges Lemaître's Big Bang theory?

• Hannes Alfvén

• Thomas Gold

• Edwin Hubble

What theory of the Universe' creation did Hannes Alfvén propose?

• Big Bang Theory

• Plasma Universe Theory

• Steady-State Theory

What does the Red Shift phenomenon state?

• The Red Shift phenomenon is a measure of the brightness of stars in our galaxy.
• The Red Shift phenomenon states that light from distant galaxies is shifted to shorter wavelengths, indicating they are moving closer to us.
• The Red Shift phenomenon describes the increase in temperature of stars as they age.
• The Red Shift phenomenon states that light from distant galaxies is shifted to longer wavelengths, indicating they are moving away from us.

What does the Big Bang Theory state?

• The universe is static and unchanging.
• The universe was created by a divine being.
• The universe originated from a single atom and has been expanding since.

• The universe has always existed in its current form.

According to Hubble's Law, what relationship exists between the distance of a galaxy and its velocity?

• The velocity of a galaxy is constant regardless of its distance from Earth.
• The velocity of a galaxy increases with its distance from Earth. (Direct)

• There is no relationship between a galaxy's distance and its velocity.
• The velocity of a galaxy decreases with its distance from Earth. (Indirect)

What is the Cosmic Microwave Background (CMB) radiation?

• Radiation emitted by stars in the Milky Way
• The light from distant galaxies that has been redshifted
• The Cosmic Microwave Background (CMB) radiation is the remnant radiation from the Big Bang, filling the universe with low-energy microwaves.
• A type of radiation used in microwave ovens

What does the Plasma Universe Theory suggest?

• The universe is entirely made of solid matter.

• Gravity is the only force shaping cosmic structures.

• Dark matter is the primary component of the universe.

• Plasma and electromagnetic forces are fundamental to understanding the universe.

Who proposed the Steady-State Theory?

• Niels Bohr
• Fred Hoyle, Thomas Gold, and Hermann Bondi
• Isaac Newton
• Albert Einstein

The Big Bang Theory states that the universe is constantly expanding.

• False

• True