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WorksheetsChapter 14 - The History of the Earth
Total questions: 10
Worksheet time: 5mins
The age of the Earth is estimated to be approximately
2 million years
2 billion years
4 billion years
2 trillion years
Which of the following is not thought to have been a factor in the formation of the Earth?
Pieces of debris in space collided with Earth, thereby heating it
Pieces of debris in space added to the size of Earth
Earth was formed from debris that circled the sun as it formed
Earth was formed from the collision of two small stars
The half-life of a radioactive isotope
does not change
varies with the seasons
increases as the radioactive isotope ages
fluctuates
Isotopes are forms of the same element that differ in
atomic number
number of electrons
number of neutrons
number of protons
Miller and Urey did not use oxygen gas in their apparatus because oxygen
is not essential to most forms of life
does not react with ammonia, methane, or hydrogen
would have led to the formation of microorganisms
was not believed to have been present in Earth's early atmosphere
In their experiment, Miller and Urey produced
energy
microorganisms
radioactive isotopes
amino acids
RNA molecules can
catalyze the synthesis of DNA
catalyze the synthesis of eukaryotic cells
produce complimentary copies of their own nucleotide sequence
all of the above
Which of the following is a true difference between photosynthetic organisms and chemosynthetic organisms?
They differ in the source of energy they use to produce organic molecules
They differ in the source of carbon they use to produce organic molecules
Photosynthetic organisms are found on Earth today, while chemosynthetic organisms are no longer found on Earth
Photosynthetic organisms are eukaryotic, while chemosynthetic organisms are prokaryotic
The surface of earth is protected from damaging ultraviolet light by
oxygen
ozone
hydrogen
nitrogen
Many scientists think that early aerobic prokaryotes invaded larger cells and eventually gave rise to
chloroplasts
DNA
mitochondria
ribosomes
