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Science Test Prep

2nd six weeks vocab 10-28-2011

QuestionAnswer
What is the defintion for physical characteristic? can be oberserved without changing the substance (5 senses; see, hear, touch, taste and smell)
What are examples of physical characteristics? color, odar, freezing point, density and color change
What is the definition for physical change? when the appearance of an object changes
What are examples of physical change? change of state, tearing, molding, evaporation, size/shape change and dissolving
What is the defintion for chemical change? the subtances created during a chemical reaction are completely different from the original substance
What are characteristics for metals? luster, ductility, malleability, magnetism, good conducter of electricity, shiny, etc
What are characteristics of nonmetals? dull, brittle, gas and poor conducter of electricity.
What elements are most abundant in the atmosphere? nitrogen and oxygen
What elements are most abundant in the human body? oxygen and carbon
What elements are most abundant in the Earth's crust? oxygen, silicon and carbon
What elements are in the atmosphere? argon, oxygen and nitrogen
What elements are in the Earth's crust? oxygen, silicon, iron, aluminum, calcium and nitrogen
What elements are in the human body? oxygen, carbon, hydrogen and nitrogen
What is the difference between a compound and an element? an element can't be broken down but a compound can because it's more than one thing
How can you tell if a chemical formula is showing an element or a compound? a compound has two or more letters and an element has one capitol letter
What does electrical conductivity mean? a physical property that describes how electricty can be conducted or carried through an object
What does magnetic mean? a physical property that describes if matter is attracted to a magnet
What does luster mean? is a physical property that describes if a object is shiny
What does malleability mean? is the physical property that describes if matter can be hammered into thin sheets
What does brittle mean? is a physical property that breaks easily if struck or hammered
What does sublimation mean? a solid to a gas
What does ductility mean? the ablity for a substance to be pulled into a wire
What does state mean? is the physical form in which a substance exists, such as a solid, liquid or gas
What does density mean? the amount of matter in a given space or volume
What does solubility? the ablity of a substance to dissolve into another substance
What does thermal conductivity mean? rate at which a substance transfers thermal energy
What does pressure mean? the amount of force exerted on a given area
What does melting mean? the change of state from a solid to a liquid
What does freezing mean? the change of state from a liquid to a solid
What does vaporization mean? the change of state from a liquid to a gas; includes boiling and evaporation
What does boiling mean? vaporization that occurs thoughtout a liquid
What does evaporation mean? vaporization that occurs at a surface of a liquid
What does condensation mean? the change of state from a gas to a liquid
Created by: come_on_summer on 2011-10-25



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