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2nd TEST SC CARDS

Test Preparation STACKS

QuestionAnswer
What is a Mixture? It is two or more SUBSTANCES with NO SET RATIO and NO INTERACTION BETWEEN MOLECULES.
What are MODELS used for? They are used to REPRESENT things that are TOO SMALL or TOO BIG to be seen directly.
What is a SUBSTANCE? It is MATTER that is made of the SAME TYPE of ATOMS or MOLECULES all the way through.
What is one difference between an everyday explanation and a scientific one? In a Scientific explanation QUALITATIVE and/or QUALITATIVE DATA is COLLECTED & that data SUPPORTS the scientific CLAIM
What are the three important parts of a scientific explanation The three important parts of a Scientific Explanation are 1) CLAIM 2) EVIDENCE 3) REASONING
What is a CLAIM? It is a STATEMENT that tells WHAT HAPPENED or ANSWERS a QUESTION in an INVESTIGATION or EXPERIMENT.
What is EVIDENCE? It is the DATA COLLECTED from OBSERVATIONS or TESTS to SUPPORT a CLAIM. It is EVIDENCE that makes an explanation SCIENTIFIC
What is REASONING? It is a way (or method) of CONNECTING the EVIDENCE (DATA) to the CLAIM by using SCIENTIFIC PRINCIPLES (RULES)
What are two types of EVIDENCE Two types of Evidence are QUALITATIVE Evidence (Describes what you observe in experiment) and QUANTITATIVE Evidence (Measures what happens in experiment)
What is one Principle (Rule or Law) of Science tells us how properties relate to substances. It is a PRINCIPLE (or Rule or Law) of Science that the Properties of a Substance (Color, Hardness, Solubility, Melting Point) are the same whatever may be the amount of matter in a sample.
Describe how the molecular structure of a substance helps us understand it? It is the MOLECULAR STRUCTURE of a SUBSTANCE that causes it to have the PROPERTIES (color, hardness, solubility, melting point, density) by which we know WHAT it is.
What are the CLUES or SIGNS that a Chemical Reaction is occurring? Some CLUES/SIGNS of a Chemical Reaction are: 1) BUBBLING, FIZZING, INCREASE OF VOLUME because of GAS FORMING 2) TEMPERATURE CHANGE without adding or removing heat 3) PRECIPITATE FORMS: a SOLID forms when two LIQUIDS interact 4) LIGHT PRODUCED
WHAT is a CHEMICAL REACTION? A Chemical Reaction is a PROCESS in which SUBSTANCES INTERACT to form NEW SUBSTANCES with different PROPERTIES (color, hardness, solubility, melting point, density).
How do MOLECULES of Substances in a MIXTURE interact. The DO NOT INTERACT.
HOW do we KNOW if a chemical reaction occurs? We know a Chemical Reaction occurs from CHANGES IN PROPERTIES and other CLUES or SIGNS that are common to Chemical Reactions
Name some PROPERTIES of Substances that might change in a Chemical Reaction. PROPERTIES of Substances that might change in a Chemical Reaction are: COLOR, HARDNESS, SOLUBILITY IN WATER, DENSITY, MELTING POINT.
What are the REACTANTS of a Chemical Reaction? In a Chemical Reaction the REACTANTS are the BEGINNING or ORIGINAL Substances—the “Old Stuff”.
What the PRODUCT of a Chemical Reaction? The PRODUCT of a Chemical Reaction is (are) the END Substance(s).
What is a WORD EQUATION of a Chemical Reaction? It is a way to use NAMES of SUBSTANCES to DESCRIBE what happens in a Chemical Reaction. It describes what Reactants “interact to form” what Product(s). Example: Copper Sulfate plus acetic acid (reactants) interact to from copper acetate (product)
What are CHARACTERISTIC PROPERTIES? They are the Properties that Substances have because of the MOLECULES or MOLECULAR STRUCTURES that make them up.
WHAT is a CHEMICAL REACTION (define to include Decomposition type & give examples) A PROCESS in which ONE or MORE substances change their MOLECULAR STRUCTURE to form new SUBSTANCES. Examples of DECOMPOSITION Chemical Reactions: 1) Water to Hydrogen and Oxygen gases 2)Dead animals, trees and plants to mostly Carbon Dioxide and Water
Created by: familystudy22
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