Question

what is the big bang?
the big bang theory is the leading explanation about how the universe began. at its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.7 billion years to the cosmos that we know today. the big bang theory has been added to in recent decades with a further explanation of the initial second after the big bang. this new addition, called inflation theory, explains the conditions from (10^{-36}) seconds to sometime between (10^{-33}) and (10^{-32}) seconds after the singularity.

check out this link from pbs or refer back to our notes to help you fill in some major events that happened in the evolution of our universe. list when each happened and any other relevant information surrounding that time period.

1. creation of ions (protons and neutrons join together);
2. creation of atoms (electrons join protons and neutrons to form neutral atom);
3. stars and galaxies start to form;
4. our star and solar system starts forming;
5. life on earth begins;

types of evidence
since it is a theory, we can create testable hypotheses to support or refute the theory. watch this short (1 minute) video clip explaining the types of evidence supporting the big bang. in addition to mathematical equations (which are super important!), what other types of evidence can be used to support the big bang?

Explanation:

To answer the questions about the Big Bang Theory and related events, we can use the following information:

1. Creation of Ions (protons and neutrons join together)

• Time: Approximately 1 second to 3 minutes after the Big Bang.
• Relevant Information: This period is known as Big Bang Nucleosynthesis. During this time, the universe was hot enough for protons and neutrons to combine and form the nuclei of light elements such as hydrogen, helium, and a small amount of lithium.

2. Creation of Atoms (electrons join protons and neutrons to form neutral atom)

• Time: About 380,000 years after the Big Bang.
• Relevant Information: This event is called recombination. As the universe expanded and cooled, electrons were able to combine with atomic nuclei to form neutral atoms. This process allowed photons to travel freely, leading to the Cosmic Microwave Background (CMB) radiation that we observe today.

3. Stars and galaxies start to form

• Time: Approximately 100 million to 1 billion years after the Big Bang.
• Relevant Information: After recombination, matter began to clump together under the influence of gravity. These clumps eventually grew into the first stars and galaxies. The formation of the first stars is often referred to as the "Cosmic Dawn."

4. Our star and solar system starts forming

• Time: About 4.6 billion years ago (or approximately 9.1 billion years after the Big Bang).
• Relevant Information: Our Sun and solar system formed from a giant molecular cloud. The collapse of this cloud led to the formation of the Sun at its center, with the planets and other celestial bodies forming from the surrounding disk of gas and dust.

5. Life on Earth begins

• Time: Approximately 3.5 to 4 billion years ago (or about 9.5 to 10 billion years after the Big Bang).
• Relevant Information: The earliest evidence of life on Earth comes from fossilized microbial mats called stromatolites. These organisms were likely simple prokaryotes (bacteria and archaea) that thrived in the early oceans.

Types of Evidence Supporting the Big Bang Theory

In addition to mathematical equations, the following types of evidence support the Big Bang Theory:

1. Cosmic Microwave Background (CMB) Radiation: The CMB is a faint glow of radiation that fills the universe. It is considered the afterglow of the Big Bang and provides strong evidence for the theory.
2. Abundance of Light Elements: The observed abundances of hydrogen, helium, and lithium in the universe are consistent with the predictions of Big Bang Nucleosynthesis.
3. Hubble's Law and the Expansion of the Universe: The observation that galaxies are moving away from us at speeds proportional to their distance (Hubble's Law) suggests that the universe is expanding. This expansion can be traced back to a single point in time, supporting the idea of a Big Bang.
4. Large-Scale Structure of the Universe: The distribution of galaxies and galaxy clusters in the universe is consistent with the predictions of the Big Bang Theory and the process of structure formation.
5. Olbers' Paradox: The fact that the night sky is dark (Olbers' Paradox) can be explained by the finite age of the universe and its expansion, which are key components of the Big Bang Theory.

Answer:

To answer the questions about the Big Bang Theory and related events, we can use the following information:

1. Creation of Ions (protons and neutrons join together)

• Time: Approximately 1 second to 3 minutes after the Big Bang.
• Relevant Information: This period is known as Big Bang Nucleosynthesis. During this time, the universe was hot enough for protons and neutrons to combine and form the nuclei of light elements such as hydrogen, helium, and a small amount of lithium.

2. Creation of Atoms (electrons join protons and neutrons to form neutral atom)

• Time: About 380,000 years after the Big Bang.
• Relevant Information: This event is called recombination. As the universe expanded and cooled, electrons were able to combine with atomic nuclei to form neutral atoms. This process allowed photons to travel freely, leading to the Cosmic Microwave Background (CMB) radiation that we observe today.

3. Stars and galaxies start to form

• Time: Approximately 100 million to 1 billion years after the Big Bang.
• Relevant Information: After recombination, matter began to clump together under the influence of gravity. These clumps eventually grew into the first stars and galaxies. The formation of the first stars is often referred to as the "Cosmic Dawn."

4. Our star and solar system starts forming

• Time: About 4.6 billion years ago (or approximately 9.1 billion years after the Big Bang).
• Relevant Information: Our Sun and solar system formed from a giant molecular cloud. The collapse of this cloud led to the formation of the Sun at its center, with the planets and other celestial bodies forming from the surrounding disk of gas and dust.

5. Life on Earth begins

• Time: Approximately 3.5 to 4 billion years ago (or about 9.5 to 10 billion years after the Big Bang).
• Relevant Information: The earliest evidence of life on Earth comes from fossilized microbial mats called stromatolites. These organisms were likely simple prokaryotes (bacteria and archaea) that thrived in the early oceans.

Types of Evidence Supporting the Big Bang Theory

In addition to mathematical equations, the following types of evidence support the Big Bang Theory:

1. Cosmic Microwave Background (CMB) Radiation: The CMB is a faint glow of radiation that fills the universe. It is considered the afterglow of the Big Bang and provides strong evidence for the theory.
2. Abundance of Light Elements: The observed abundances of hydrogen, helium, and lithium in the universe are consistent with the predictions of Big Bang Nucleosynthesis.
3. Hubble's Law and the Expansion of the Universe: The observation that galaxies are moving away from us at speeds proportional to their distance (Hubble's Law) suggests that the universe is expanding. This expansion can be traced back to a single point in time, supporting the idea of a Big Bang.
4. Large-Scale Structure of the Universe: The distribution of galaxies and galaxy clusters in the universe is consistent with the predictions of the Big Bang Theory and the process of structure formation.
5. Olbers' Paradox: The fact that the night sky is dark (Olbers' Paradox) can be explained by the finite age of the universe and its expansion, which are key components of the Big Bang Theory.