Defining Atoms

The first people to think about what matter is made of were the _______.

• Greek philosophers

• American Scientists

• alchemists

• scientists

_______ was a Greek philosopher who suggested that matter is made up of small particles called atoms.

• Democritus

• Aristotle

• Dalton

• Alchemist

True or False

Democritus believed that atoms were indivisible (cannot be divided).

• True

• False

True or False.

People believed Democritus ideas about matter.

• True

• False

True or False?

Democritus had evidence to support his ideas about atoms.

• True

• False

______ thought that matter was made up of elements called earth, fire, water, and air.

• Aristotle

• Democritus

• Socrates

• Plato

True or False?

Democritus came up with his idea of atoms in 465BC.

• True

• False

_____ was the British scientist who investigated Democritus' theory of atoms.

• Aristotle

• John Dalton

• Albert Einstein

• Socrates

Dalton did his work around the year _______.

• 465 BC

• 1802

• 1960

• 345 BC

True or False?

Dalton's atomic theory supported Aristotle's theory of matter.

• True

• False