Process of Science
A proposed explanation that is testable and disprovable.
Hypothesis
Name any 2 of the 4 categories of biomolecules
Carbohydrates, Lipids, Nucleic acids, Proteins
What type of biomolecule is RNA?
Nucleic Acid
The idea that the building blocks for life emerged from chemicals mixing in the oceans of early Earth and formed spontaneously into the first living things.
Primordial Soup Hypothesis
An explanation that has been repeatedly tested and corroborated in accordance with the scientific method
Theory
It was previously believed that biomolecules could only be produced by ______________
Living Things
Ribozyme
Type of organism that can survive extreme conditions
Extremophile
Is this a valid hypothesis: "Life on earth began because an alien civilization called the Zergs used the planet to dispose of garbage and accidentally introduced spores here." WHY/ WHY NOT?
No. It is not testable and disprovable
The Miller-Urey experiment showed that at least some biomolecules could be created by _____________
Simple chemistry, spontaneous chemical reactions
Panspermia hypothesis
Type of biomolecule found to form spontaneously by the Miller-Urey experiment.
How might I test the following hypothesis: "My dog's ear itches because she has fleas"
The false idea that life forms such as maggots could spontaneously emerge from nonliving matter such as rotting meat
Abiogenesis or spontaneous generation
Name given to the first living thing that went on to evolve into all life on Earth.
LUCA (Last Universal Common Ancestor)
A measure of how disordered a system is
Entropy
Create a valid hypothesis to explain the following observation:
There is more moss on the north-facing side of the trees where I live.
Example- "The moss grows on the north because it is exposed to less sunlight and moss grows better in the shade."
"Moss grows on the side of objects that faces the north pole because of the Earth's magnetic field."
What are two key differences between the idea that maggots come from rotting meat and the explanation proposed in the Primordial Soup Hypothesis?
Much longer time scale and much simpler initial life forms in Primordial Soup Hypothesis
2 reasons the RNA World Hypothesis says that life could have evolved from RNA
- RNA is common in all living things
- Similar to DNA
- Able to catalyze (speed up) chemical reactions
- Able to self-replicate and evolve
What does the second law of thermodynamics say
Entropy always increases. Order turns into disorder over time.