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;
7 Cards in this Set
- Front
- Back
|
4 Steps Scientific method |
1. Observation: measuring or observing some aspect of nature 2. Hypothesis: tentative interpretations based on observations 3. Laws: summarize the results of a large number of observations. 4. Theories: models that explain and give underlying causes for observations and laws |
|
|
Chemistry |
Science that studies how matter behaves by studying how atoms and molecules behave |
|
|
What things must be tested by experiment? |
hypothesis, laws, theories |
|
|
Scientific Law |
Brief statement that synthesizes past observations and predicts new ones |
|
|
Law of Conservation of mass |
Lavoisier burned substances in closed containers, measure the mass of each container and its contents before and after, noted that there was no change in mass during combustion. "In a chemical reaction, matter is neither created nor destroyed." |
|
|
Hypothesis |
tentative interpretation or explanation of events 1. good hypothesis is falsifiable, further testing has the potential to prove it wrong. 2. hypotheses are tested by experiments -highly controlled observations designed to validate or refute hypothesis hypothesis may have to be modified modified hypothesis needs further testing. |
|
|
Theories |
well-established hypotheses may form theory broader, deeper explanation for observations and laws theories are models of the way nature is often predict behavior that extends well beyond observations and laws on which they are founded |
