Characteristics of Life
Compost Experiment
The Beginnings of Life I
pH Lab
The Beginnings of Life II
100
Basic unit of life.
What is a cell?
100
The change in height of the compost column over time is an example of this kind of variable.
What is a dependent variable?
100
The 4 major elements that make up all life.
What are H, O, C, and N?
100
An atom that has a positive or negative charge.
What is an ion?
100
Goo-like bacteria hanging from the ceiling of some caves.
What is a snottite?
200
The way in which organisms make more of themselves.
What is reproduction?
200
Carbon source, nitrogen source, and starter are examples of this kind of variables.
What are independent variables?
200
Ingredients believed to be needed for making mice in the 16th century by scientists that believed in the theory of spontaneous generation.
What are a vessel, a dirty garment, and wheat?
200
A compound that reduces the concentration of H+ ions in solution, usually by producing OH- ions.
What is a base?
200
The color of the sky and ocean of Earth 4 billion years ago.
What is red and green?
300
Living organisms need this to move and carry out metabolism (usually in the form of ATP).
What is energy?
300
The two nitrogen sources used in this experiment.
What are food scraps and coffee grounds?
300
In 1953, this scientist set up a famous experiment to find out how life could have begun on Earth.
Who is Stanley Miller?
300
A compound that forms H+ ions in solution.
What is an acid?
300
What Stanley Miller found in his flask after one week.
What are organic compounds (amino acids)?
400
When traits are passed from parent to offspring.
What is heredity?
400
The three carbon sources used in this experiment.
What are leaves, straw, and peat moss?
400
Two gases that made up the atmosphere of Earth 4 billion years ago.
What are carbon dioxide and hydrogen sulfide.
400
The ion concentration measured by the pH scale.
What are hydrogen (H+) ions?
400
Object formed when a planet hit the Earth.
What is the moon?
500
The ratio used to determine how much carbon-rich matter and how much nitrogen-rich matter should be added to a compost pile.
What is the carbon to nitrogen (C:N) ratio?
500
The period and the celestial objects that may have brought the building blocks of life to earth.
What is the heavy bombardment and comets and asteroids?
500
The stronger of these two acids, vinegar with a pH of 2.8 or orange juice with a pH of 4.2.
What is vinegar?
500
Evidence for origin of life outside our planet found in a meteorite that landed in Murchison, Australia
What are organic compounds (ie. amino acids)
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