Self-study
P1
Spurred by the discovery that a substance containing uranium emitted radiation, Marie Curie began studying radioactivity in 1897. ███ █████ ██████ ████ ███ ██████ ███ █████████ ███ █████ █████ ███ ████ ██████ ████████████ █ ███████ ████ ███ █████ ██ ███████ ████████ ███ ██████████ ████ ██ ███ ████ ███████████ ████ ████████ ██████ ██ ███ ██████████ ████ ███████████ ████ ███████ ██ █████ ███ █████ ███████████ ████████ █████ ███ ████ ██ ███████ █ ████ ██ ██████████ ███████ █████████ ████████ ███ ███████ ███████ ███ █████████ ██ ███ ████ ██ ███████████ █████████ ███ ██████████ ████ ███████ ███████ █████████ ██ █ ██████████ █████ ████ ██ ██████ ██ ██████████ █████ ██ █████ ████████ █████ █████████ ████ ███ ████████ ████ ███ █ █████ ███████ ███ █████████ ████████████ ███████ █████████ ████████ ██ ██ ████████████ ████ ██ ███████████ ██████████ ███████ █████████ ███ ████████████ █████████ ███ ███ ██████ ██ █████████ █
Intro topic ·
Marie Curie's discoveries related to radiation
Discovered polonium and radium. Also disocvered that uranium emitted radiation at a constant rate. But, she couldn't explain what causes raidation.
P2
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Critics and response ·
Some fault Curie for not discovering cause of radiation and decreasing rate; author says it wasn't her fault
Curie didn't have the evidence that we have today.
Support for author's response ·
Various radioactive isotopes weren't available to Curie or decayed to slowly to learn anything about rate
P3
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Additional support ·
Nature of atom was being debated during Curie's time
Physicists (like Curie) believed that matter couldn't be divided indefinitely. In other words, there's nothing smalling than the atom.
P4
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Continuing prior support ·
Curie couldn't have realized that atoms lose mass
Praise for Curie ·
Curie's research helped later breakthroughs
Passage Style
Critique or debate
Spotlight
10.
The passage implies which one ██ ███ █████████ ████ ██████ ██ ███ ████ ██ █████ █████ █████ ████████ ██████████████
a
Pitchblende was not █████ ██ ██████████ ██ ███████ ███ ███████████ ███████ ███████ ████████
Supported, because Curie had a
b
Radioactivity was suspected ██ ██████████ ██ █████ ████ ███ ███████ █████████ ██ ███████████ ██████ ████ ████ ██████████ ████████ ██ ███
Not supported, because we don’t have any claims about what scientists suspected regarding the cause of radiation in pitchblende. If anything, scientists would probably have thought radiation in pitchblende was caused by uranium, because
c
Physicists and chemists ███ █████████ █████ ████████ █████████ ███ █████ ██ ██████████
We’re told that physicists and chemists had
d
Research was not █████ █████████ ██ ██████████ ████ ███ ████████ ██ ███████ ██ ███ ██████ ██ ████████ ██ ██████
Not supported, because the
e
The majority of ██████████ ████████ ███████ ██ ██ ███ ████ ██████ ██ ██████████████
Not supported, because we’re never told what proportion of physicists viewed uranium to be the only source of radioactivity. It’s possible none of them thought uranium was the only source of radioactivity. Although we know that scientists did not know about polonium and radium, it’s possible scientists were aware of some other kind of radioactive subtance besides uranium, polonium, and radium.