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Chem 120 week 1, exam 1 Questions and Correct AnswersChem 120 week 1, exam 1 Questions and Correct Answers $9.99   Add to cart

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Chem 120 week 1, exam 1 Questions and Correct AnswersChem 120 week 1, exam 1 Questions and Correct Answers

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  • Chem 120
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  • Chem 120

What is Dalton's atomic theory? ~ 1) All matter is made of atoms. Atoms are indivisible and indestructible. 2) All atoms of a given element are identical in mass and properties 3) Compounds are formed by a combination of two or more different kinds of atoms. What is a physical change? ~ A chan...

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  • August 12, 2024
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  • Chem 120
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Chem 120 week 1, exam 1 Questions
and Correct Answers

Scientific Method- what is Observation ?

✓✓~ First step in the scientific method. Information gathered from our senses. Can use tools to
help observe




A tentative explanation that is testable and can be written as an if or then statement?

✓✓~ Hypothesis




Well controlled process used to test a hypothesis. Effort is made

to have only one independent variable to study a clear cause and

effect relationship?

✓✓~ Experiment




What scientist control in a experiment is called?

✓✓~ Independent variable




depends on the independent variable, what is measured during the experiment?

✓✓~ dependent variable




A group or condition with a known response or outcome is called?

, ✓✓~ Positive control




A condition with no response expected is called?

✓✓~ Negative control




The data collected from an experiment?

✓✓~ Result




Theory?

✓✓~ well-tested explanation that unifies a broad range of observations




What are the 3 steps to know for Dimensional analysis?

✓✓~ -Put the units you are given on the far left side

-Put the units you want on the far right side

-Use ratios to get from the left side to the

right side.




Common SI Prefixes

✓✓~ Mega (larger than base unit)

- 1,000,000 g = 1 Mg


➢Kilo (larger than base unit) - 1000g=1kg


➢Deci (smaller than base unit) - 10dg=1g

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