Origin of the universe

 

What is the big bang theory?

• A theory that states that the universe started in a large mass and then imploded to form everything.

• A theory that states that the universe was there, will be and is there. Is homogeneous and isotropic.

• A theory that states that the universe is slowly coming back to a center.

• A theory that states that the universe started in a small mass and then expanded, the expansion cooled down the temperature and that resulted in the formation of matter, energy, space and time.

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The original two elements in our universe were ________and _______.

(a)  

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The age of the universe is probably close to___________________.

• 14 billion years.

• 4 ½ billion years.

• 15 billion years.

• 30 billion years.

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The big bang refers to:

• The origin of the universe.

• A big explosion.

• The formation of a quasar.

• The origin of earth.

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One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. According to this theory, which of the following events would need to occur first for life to evolve?

• Onset of photosynthesis.

• Synthesis of organic molecules.

• Origin of genetic material.

• Formation of the plasma membrane.

The Miller-Urey experiment of 1953 was designed to test the hypothesis that lightning supplied the energy needed to turn atmospheric gases into organic molecules such as amino acids. Which of the following describes why the Miller-Urey theory is widely accepted today?

.

• Amino acids spontaneously form from molecules in the atmosphere today.

• Organic molecules are present today in extremely high concentrations.

• The process of synthesizing organic molecules from a mixture of gases has been successfully modeled in the laboratory.

• No other alternative hypotheses have been introduced.

 

What did the Miller Urey experiment prove?

• Provided the first evidence that inorganic molecules like DNA or RNA needed for life could be formed from organic components like oxygen or hydrogen.

• Provided the first evidence that organic molecules needed for life could be formed from inorganic components like DNA or RNA.

• Provided the first evidence that light was needed for life to be formed.

• Provided the first evidence that dust is needed for life to be formed.

 

The postulate of the panspermia theory establishes that living organisms would have arrived in meteorites or comets.

• True

• False

The spontaneous generation is a theory that explains that life forms arise spontaneously from :