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Inge Lehmann discovers Earth's core

On this day in 1936, Inge Lehmann upended prevailing theories about the nature of Earth's core. Seven years prior, an earthquake had struck New Zealand. Lehmann studied the waves produced by the quake, which consisted of P and S wavesβ€”the former of which pass through all states of matter, the latter of which pass only through solids. Lehmann observed that some P waves had been deflected, as though they had been bent by something solid. Thus she came to the conclusion that the Earth had a solid coreβ€”a conclusion that was eventually validated by technology and helped to bolster the study of plate tectonics.

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People will never be able to walk on Jupiter, Saturn, Uranus, and Neptune because they are made of gas and do not have a solid surface.
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Let's do some quick true or false πŸ˜πŸ‘
The body cannot generate its own heat under very cold conditions
Anonymous Quiz
22%
True
78%
False
Don't just guess😁
Dark reactions of photosynthesis are concerned with the conversion light to chemical energy in the form of ATP and NADPH.
Anonymous Quiz
70%
True
30%
False
There is no difference between homologous and analogous structures
Anonymous Quiz
11%
True
89%
False
As energy moves up the food chain there is less and less of it to go around.
Anonymous Quiz
83%
True
17%
False
Majority of the nitrogen gas is not able to be converted to other forms
Anonymous Quiz
53%
True
47%
False
Antidiuretic hormone is released by the pituitary gland
Anonymous Quiz
70%
True
30%
False
In glycolysis, 2 ATP molecules are spent and 4 ATP molecules are gained.
Anonymous Quiz
68%
True
32%
False
Plasmodial slime moulds, and the cellular slime moulds live as amoebae during their feeding stage
Anonymous Quiz
60%
True
40%
False
Both locust and grasshopper go through complete metamorphosis
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46%
True
54%
False
Triglycerides are the only known lipids
Anonymous Quiz
34%
True
66%
False
The frequency of homozygote genotypes increase in population.
Anonymous Quiz
57%
True
43%
False