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Chem A - inf and obs

inference and observation study guide

QuestionAnswer
What is an observation? Information you get through your senses - sight, taste, smell, sound
What is an inference? A guess or prediction based on an observation Usually starts with “I think” or “I predict”
What is quantitative data? Data that contains numbers
What is qualitative data? Data that describes the quality of something
What is a chemical change? a change that results in a new material
What is a physical change? a change in the size, shape, or color of a material the material stays the same
A scientist observes a change in the color of a liquid. Observation or inference? observation
During an experiment, a bad smell is given off Observation or inference? observation
I think a chemical reaction occurred. observation or inference? inference
I predict this material might burn. observation or inference? inference
I see 74 bacteria. quantitative or qualitative? quantitative
The fish look happy. quantitative or qualitative? qualitative
24 milligrams of material : quantitative or qualitative? quantitative
a match burns: chemical change or physical change chemical change
an iron nail rusts: chemical change or physical change? chemical change
water boils and becomes steam: chemical change or physical change. physical change
a snowman melts: chemical change or physical change ? physical change
baking cupcakes: chemical change or physical change ? chemical change
making a peanut and jelly sandwich : chemical change or physical change? physical change
adding food coloring to water: chemical change or physical change? physical change
Created by: lb goodlock
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