Physics quiz online 30 mints

Who came up with the idea that matter is composed of tiny, indivisible particles?

Select one:

a. Aristotle

b. Democritus

c. Ptolemy

d. Plato

e. Copernicus

What is a theory?

Select one:

a. It is a coherent set of ideas used as principles of explanation and prediction

b. It is a careful measurement made with a device.

c. It is a wild guess about an event.

d. It is a good guess made to explain observed facts.

The law of conservation of mass states that

Select one:

a. in a chemical reaction, matter is neither created nor destroyed

b. electricity is made of a special type of atoms

c. elements are composed of compounds

d. atoms are composed of electrons, protons and neutrons

Rutherford's experiment showed that

Select one:

a. the atom is indivisible

b. the atom has no nucleus

c. the atom is mainly empty space

d. electrons are much heavier than the protons

An element is 

Select one:

a. a substance that can be analyzed into simpler substances

b. a substance that cannot be analyzed into simpler substances

c. a substance made only of neutrons

d. a mixture of different compounds

The prefix mega stands for

Select one:

a. a million

b. a billion

c. a thousand

d. a trillion

Written correctly in scientific notation, 0.000000457 is equal to 

Select one:

a. 4.57x10-7

b. 4.57x10-6

c. 0.000000457

d. 45.7x10-7

ccording to our understanding, the atom is indivisible.

Select one:

True

False