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Chemistry

Exam One Chemistry Material (no math)

QuestionAnswer
What is Chemistry Study of matter, energy, and their relationship Chemical and physical property changes Energy changes that accompany those changed
Matter Anything that has mass and takes up space
Energy ability to do work and accomplish change
Which of the following is not a chemical shampoo, sunlight, tomato, pencil Sunlight
Steps of scientific method Question, background hypothesis, experiment, analysis, Conclusion
How is matter classified based on its properties (Solid, liquid, gas) and its composition
Describe gases particles are close together, weak if any attractive forces btw particle. No definite shape or volume. Can expand to fill any container
Describe Liquids Particles are closer together, Attractive forced get stronger No definite shape, has a definite volume
Describe solids Particles are closer together in a regular patter, Strong attractive forces, has a definite shape and volume
Pure substance Constant composition, substance made of one component EX: copper, aluminum, sodium, water
Mixture Mixture of two or more substances that don't react EX: Pennies in water, air we breathe, oil and vinegar
What are the two things pure substance divides too Elements and Compounds
Elements Substances that cannot be changed into a simpler form EX: any element on periodic table, hydrogen, oxygen
Compounds Combination of two or more elements in definite ratios EX: Water H2O and Table Salt NaCl
What are the two different types of mixtures Homogeneous and heterogeneous mixture
Homogeneous mixture Mixture with a uniform dispersion of particles, evenly mixed solutions
Heterogeneous Mixtures that are not evenly mixed
What best described sweet tea Element, Heterogeneous mixture, Homogeneous Mixture, Pure substance, Compound Homogeneous mixture
Physical Property Properties observed without changing substance EX: color, density, melting or boiling point
Physical change Change occurs in the appearance of a substance, but the substance does not change. EX: Ice melting into water
Chemical Properties Properties observed when the substance changes during a chemical reaction
Chemical Change Substance is converted into one or more different substances
Which are examples of chemical changed Frying an egg, making sugar water, melting snow, Methane burns in air to form carbon dioxide and water Frying an Egg and Methane burns in air to form carbon dioxide and water
Created by: Brooke_N
 

 



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