3.1 early ideas

Which of the following was Democritus the first to propose?

• Modern atomic theory

• empty space cannot exist

• matter is not infinitely divisible

• matter is made of earth, fire, and water

Which of the following is not an idea supported by Dalton’s atomic theory

• Atoms are indivisible and indestructible.

• Atoms of a given element are identical in size, mass, and chemical properties.

• Empty space cannot exist

• Different atoms combine in whole-number ratios to form compounds.

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NGSS.HS-PS1-7

Which of the following is not true of the law of conservation of mass?

• Mass is conserved in any process.

• The total number of atoms of each element is the same before and after the reaction.

• New atoms are created in a chemical reaction

• It led to acceptance of Dalton’s atomic theory.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is not true of philosophers thousands of years ago?

• They had few tools for scientific exploration.

• They formulated explanations based on their own life experiences.

• Many concluded that matter was made of earth, water, air, and fire.

• They tested the validity of their ideas with the scientific method.