Nature of Science and Atomic Theory (PS.2a)

_________ is a proposed explanation, for a scientific problem, made as a starting point for further investigation. 

• Hypothesis
• Theory
• Law

_________ is a a well-substantiated explanation of HOW or WHY. 

• Hypothesis
• Theory
• Law

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS1-2

Scientific _______ explain a pattern in nature observed over and over. 

• hypothesis

• theory

• law

Which theory was the first atomic MODEL proposed? 

• Billiard Ball

• Electron Cloud

• Planetary Model

• Plum Pudding

Tags

NGSS.MS-PS1-1

Scientists do not update the atomic theory when they discover new information. We still believe that the atom is like a billiard ball. 

• False, scientists update the atomic theory when new information is discovered
• True, the atomic theory has not been updated since the 1800's.

Why didn't scientists show the nucleus, electrons, protons, or neutrons in the Billiard Ball Model?

• No need, this was common knowledge.

• The scientists were lazy.

• These particles had not been discovered yet.

Which theory/model represents our current understanding of the atom? 

• Electron Cloud

• Nuclear Model

• Planetary Model

• Plum Pudding

Which theory describes the atom as a sphere with negative charges scattered throughout?  

• Electron Cloud

• Nuclear Model

• Planetary Model

• Plum Pudding

Tags

NGSS.MS-PS1-1

Which model makes an analogy between the structure of an atom and the structure of the solar system? 

• Electron Cloud

• Nuclear Model

• Planetary Model

• Plum Pudding

In the Electron Cloud Model, scientists represent the atom with a nucleus at the center and electrons forming a __________ around the nucleus.

• cloud

• orbitals

• rings