Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
What is chemistry?
|
Chemistry is the study of matter and how it changes.
|
|
|
What things are made of matter?
|
living and non-living things.
|
|
|
Why study chemistry?
|
because it explains our world, helps you make better choices, makes you an informed citizen, and a possible career path.
|
|
|
What was alchemy?
|
developed the tools and techniques for working with chemicals (the word chemistry comes from alchemy)
|
|
|
When and where did alchemy begin?
|
China and India since 400 B.C.
|
|
|
What is practical alchemy?
|
techniques for working with metals, glass, dyes, etc...
|
|
|
What was mystical alchemy?
|
concepts like perfection- Gold was a perfect metal.
|
|
|
When did a shift occur from alchemy to science?
|
The 1500s
|
|
|
Who was a supporter of the "Royal Society of London for the Promotion of Natural Knowledge"?
|
King Charles II
|
|
|
what did the Royal Society of London for the Promotion of Natural Knowledge do?
|
encouraged scientists to use more experimental evidence, and not philosophical debates.
|
|
|
Who was the father of modern Chemistry?
|
Antoine Lavoisier
|
|
|
Lavoisier helped transform chemistry from a science of ______ to a science of _________
|
observation; measurement.
|
|
|
What is the scientific method?
|
A logical approach to solving problems or answering questions.
|
|
|
What is observation?
|
noting and recording information and facts.
|
|
|
What is a hypothesis?
|
a proposed explanation for the observation; must be tested by experiment.
|
|
|
What is quantitative observation?
|
involves numbers
|
|
|
What is qualitative observation?
|
a word description, such as hot.
|
|
|
What does performing experiments do?
|
gathers new information to help decide whether the hypothesis is valid.
|
|
|
What are variables?
|
factors that can change.
|
|
|
What is the independent variable?
|
the variable that we change
|
|
|
what is the dependent variable?
|
the variable observed during the experiment .
|
|
|
For results to be accepted, the experiment needs to always produce the _____ _____.
|
same result.
|
|
|
Variables can only be tested........
|
one at a time.
|
|
|
Experiments with one tested variable are said to be....
|
controlled
|
|
|
What is a theory?
|
a well tested set of observations based off a lot of experiments.
|
|
|
What is a model?
|
A set of rules that follow a theory.
|
|
|
Why are models used?
|
to help predict what will happen in certain situations.
|
|
|
What is natural or scientific law?
|
when the same observation applies to many different systems; summarizes results. example: Law of Conservation of Mass.
|
|
|
A theory attempts to ______, whereas a law just makes a statement.
|
explain
|
|
|
A theory is based off of __________ whereas a law is based off of ____________ __________ of a natural event
|
experimentation, repeated observations.
|
|
|
A law says something happens, a theory tries to explain___________
|
Why it happened.
|
