Question

how did the development of the earliest idea about atoms differ from the later work of scientists?
○ it was based on sound evidence.
○ there were explanations for the idea.
○ it was based on the thoughts of an early philosopher.
○ there were experiments conducted to support the idea.

Explanation:

The earliest idea about atoms (from Democritus, an early philosopher) was a philosophical speculation without experimental evidence or sound empirical support. Later scientists (like Dalton, Thomson, etc.) based their work on experiments and evidence. Let's analyze each option:

• "It was based on sound evidence." → False, early idea lacked sound evidence.
• "There were explanations for the idea." → Both early and later work had explanations, so not a difference.
• "It was based on the thoughts of an early philosopher." → True, Democritus' idea was philosophical, later work was scientific with experiments.
• "There were experiments conducted to support the idea." → False for early idea, true for later, but the option says "there were" for early, which is wrong. So the correct option is the one about being based on an early philosopher's thoughts.

Answer:

C. It was based on the thoughts of an early philosopher.