Complete the sentence: Each science builds on ___________.

• the work of previous scientist

• progressions of their own work

The law of conservation of mass says that even though matter can change form its (total) mass:

• always stays the same.

• increases.

• decreases.

Tags

NGSS.HS-PS1-7

What is the tube called that emits light when an electrical current passes through it?

• flourescent tubes

• discharge tubes

• gas tubes

Tags

NGSS.HS-PS2-5

NGSS.HS-PS4-1

What kind of charge did the cathode ray have?

• positive

• negative

• neutral

Electrons have what kind of charge?

• negative

• positive

• neutral

What did Thompson know about the atom?

• it had a positive charge

• it had a neutral charge

• it had a negative charge

Who developed the Gold Foil Experiment?

• Democritus

• John Dalton

• JJ Thompson

• Earnest Rutherford

Which of the following is a fundamental particle of an atom?

• Proton

• Molecule

• Compound

Tags

NGSS.HS-PS1-8

What is the charge of a neutron?

• positive

• negative

• neutral

What is the smallest unit of an element that retains the properties of that element?

• Molecule

• Atom

• Compound