Question

1. what is one key similarity between daltons and democrituss theories? 2. what is one key difference between daltons and democrituss theories?

Explanation:

1. Both Dalton and Democritus proposed the existence of atoms. Democritus was an ancient - Greek philosopher who first suggested the idea of atoms as indivisible particles. Dalton, in the 19th century, proposed his atomic theory based on scientific experiments, also considering atoms as the fundamental building - blocks of matter.
2. Democritus' idea was more of a philosophical speculation without experimental evidence. Dalton's theory was based on scientific observations and experiments, such as the law of conservation of mass and the law of definite proportions.

Answer:

1. Both proposed the existence of atoms as fundamental particles of matter.
2. Democritus' idea was philosophical; Dalton's was based on scientific experiments.