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Stack #4693637

QuestionAnswer
What is a hypothesis and educated guess about how the natural universe works. It consists of observations and data.
What is a scientific theory general statement that explains a number of observations
What is a scientific law something that is pure and of the highest understanding ppof the natural universe. Usually cannot be proved as it already has been
What is chemistry branches of science
What is the difference between quanitative and qualatitive qual: description of the quality of an object (hard, soft, yellow) quan: the specifc amount of something (25 students, 650 watermelons)
What is the scientific method a system occuring during experiments and it consists of 1. collecting data 2. form hypothesis 3. plan and do experiements 4. redifine hypothesis
What is matter anything that is has mass and occupies space containing tiny particles
How do observations and law coinside obsevations are an analysis and laws are a explation >hypothsis > experiments>theory
What is a solid definite shape and volume: particles visable around axis close together crystal: constant particles arranged in a regular array of positive and negative ions
What is a liquid definate volume but NOT definate shape: particles free roam
What is a gas indeifinte volume and no fixed shape: particles roam free with little to no attraction to each other. Highly compresible
What are physical properties Charactertics of a substance that can be observed or measured with out change to identiy: hardess helps determine how this might be used, melting/boiling point
What are chemical properties describes potential to undergo some chemical change or reaction by virtue of its composition; other terms used; rot, explode, burn, ferment
What is a physical change no bounds are broken or formed, same beginning to end and may include changes of state(vapor, freexe, condensation) making solutions, physical deformation and describe reverse or irreverseable
What is a chemical change occurs when bonds are broken and are formed between molecous and atoms: temp, light, color, bubbles, smell or taste, solid
What is an element simplest form of matter with unique set of properties (oxygent, gold, rust)
What is a compound: substance that contains tow or more elements that chemically compound into a fixed property
What is a pure substance only contains one kid of mixture
Homogeneous mixture two or more substances that are imediatly mixed (food coloring and water)
What is a heterogeneous mixture not uniform throughout the mixture i.e veggie soup
What is a mixture tow or more substances combined together
What is a substance uniform and definite composioiton
What is a phase any part of a sample that has uniform composiiton and properities
What is chromatogrpahy seperation of mixture by passing it in solution or suspension as a vapor through a medium at which compents move through different stays
What is distillation affective method to seperate mixtures comprised of two or more pure liquids
What is evaporation technique to seperate out homogeneos mixture when there is one or more dissolved salts
What is filration seperation method to seperate pure substances in mixture comprised of particles
How is matter catorgized matter pure substance or mixture pure sub>element or compound mixture>homogeneous or heterogenous
Created by: annabreuer
 

 



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