Chapter 1 Flashcards
Which molecules are important to soda fizzing?
Carbon dioxide and water - The bubbles are carbon dioxide gas molecules escaping from liquid water
How many atoms do Carbon Dioxide molecules have?
1 Carbon
2 Oxygen
What type of bond do Carbon Dioxide molecules have?
Chemical bonds
What determines everything about the substance that a molecule composes?
The details of how atoms bond together to form a molecule - straight, bent, or another shape
How is pressure defined?
Collision between gaseous molecules and the surfaces around them
What determines how something (ex: water) behaves?
Molecules determine how things behave
What is the definition of Chemistry?
Chemistry is the science that tries to understand how MATTER behaves by studying how ATOMS and MOLECULES behave
Which chemist studied combustion by burning substances in closed containers? What did this chemist do?
Lavoisier - he carefully measured the mass of each container before and after burning and there was no change in the mass during combustion
What can Observations lead to?
What did Lavoisier’s observation lead him to do?
Observations can lead to forming hypothesis - a tentative interpretation of observations
Lavoisier’s observations on combustion by hypothesizing that combustion involved the combination w a substance that was in the air
A good hypothesis is:
Falsifiable - further testing can prove a hypothesis wrong
What are hypotheses followed up by?
Hypotheses are followed by experiments which can validate or invalidate hypothesis
What leads to a development of scientific law?
Define Scientific Law
Similar observations –> Scientific Law
Scientific Laws are brief statements that summarizes past observations and predict future ones
