CHEM 1411 EXAM 1 QUESTIONS WITH
100% CORRECT ANSWERS L LATEST
VERSION 2025/2026.
Atoms - ANS sub-microscopic particles that are the fundamental building blocks of ordinary
matter
Molecules - ANS two or more atoms attached in a geometrical arrangement (bonds) which
come in different shapes, patterns, and strength
Chemistry - ANS The science that seeks to understand the behavior of matter by studying the
behavior of atoms and molecules
Scientific knowledge - ANS based on observations and experiments
Qualitative Observations - ANS used to describe characteristics of objects or its behavior in
nature
Examples of qualitative observations - ANS color, smell, taste, state (solid, liquid, gas)
Quantitative Observation - ANS used to compare a characteristic to a standard numerical
scale
Examples of quantitative observation - ANS amount (mL, L,) weight (g, kg) height
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Hypothesis - ANS an interpretation or an explanation for the observation
Experiments - ANS highly controlled procedures to test whether the observation about
nature is true
You can change your _____________ but you cannot change your _______________ -
ANS hypothesis, experiment
Scientific Law - ANS statement that summarizes all past observations and predicts future
ones (predicting the future so you can test it)
Law of Conservation of Mass - ANS In a chemical reaction, matter can neither be created nor
destroyed
Scientific theory - ANS an explanation for why things in nature are the way they are and
behave the way they do (models validated with experiments)
______________has no explanation but has observations. But ____________ has an
explanation. - ANS Laws, theory
To explain what happens:
1) if its a single or small number of events
2) if it applies to all events - ANS 1) observation
2) law
To explain why something happens:
1) if single or small #:
2) if it applies to all events: - ANS 1) hypothesis
2) theory
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
100% CORRECT ANSWERS L LATEST
VERSION 2025/2026.
Atoms - ANS sub-microscopic particles that are the fundamental building blocks of ordinary
matter
Molecules - ANS two or more atoms attached in a geometrical arrangement (bonds) which
come in different shapes, patterns, and strength
Chemistry - ANS The science that seeks to understand the behavior of matter by studying the
behavior of atoms and molecules
Scientific knowledge - ANS based on observations and experiments
Qualitative Observations - ANS used to describe characteristics of objects or its behavior in
nature
Examples of qualitative observations - ANS color, smell, taste, state (solid, liquid, gas)
Quantitative Observation - ANS used to compare a characteristic to a standard numerical
scale
Examples of quantitative observation - ANS amount (mL, L,) weight (g, kg) height
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Hypothesis - ANS an interpretation or an explanation for the observation
Experiments - ANS highly controlled procedures to test whether the observation about
nature is true
You can change your _____________ but you cannot change your _______________ -
ANS hypothesis, experiment
Scientific Law - ANS statement that summarizes all past observations and predicts future
ones (predicting the future so you can test it)
Law of Conservation of Mass - ANS In a chemical reaction, matter can neither be created nor
destroyed
Scientific theory - ANS an explanation for why things in nature are the way they are and
behave the way they do (models validated with experiments)
______________has no explanation but has observations. But ____________ has an
explanation. - ANS Laws, theory
To explain what happens:
1) if its a single or small number of events
2) if it applies to all events - ANS 1) observation
2) law
To explain why something happens:
1) if single or small #:
2) if it applies to all events: - ANS 1) hypothesis
2) theory
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
