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Chapter 8 Science

QuestionAnswer
What is a solid? matter that cannot flow(definite shape) and has definite volume. Has strong bonds
What is a liquid? definite volume but takes the shape of its container(flows). Has weak bond
Wha is a gas? a substance without definite volume or shape and can flow. Has weak bond
What is plasma? formed at high temperatures; very high energy phase of matter. Made up of charged atoms. No bonds.
What is a conductor? a material that is good at passing energy
What is a insulator? a material that is not good at passing energ
What are bonds? Forces that hold groups of atoms together and make them function as a un
What is an atom? the smallest part of matter that has its own identity.
What is a molecule? two or more atoms combined to make chemical bonds
What is a compound? two or more of the different kinds of atoms combined by chemical bonds.
What is an element? two or more of the same type of atom combined by chemical bonds
What are two different kinds of solids? Crystalline and Amorphous
Is crystalline a conductor or insulator? Conductor
Is amorphous an insulator or conductor? Insulator
How does matter respond to temperature changes? . If the temperature is really hot the matter of the object will get bigger. If the temperature is cold and matter of the object will get smaller. The atoms change based on the temperature.
What is thermal expansion? the changing of the matter of an object based on the temperature.
What is viscosity? the liquid resistance to flow
What is surface tension? atoms in a liquid will stick together at the surface and resist outside forces. This will make them form rops or a meniscus
What is density? compactness of a substance
What is diffusion? The particles spread out until they are evenly distributed
What is Boyle's Law? The relationship between volume and pressure of a gas/ if one increases the other decreases. Example is the marshmallow lab
What is Charles Law? Effect of temperature on a volume gas. If the temperature goes up the volume goes up. If the temperature goes down the volume goes down.
What is plasma? formed at high temperatures, very high energy phase of matter, Made up of charged atoms. No bonds
What is the Kinetic Theory of Matter? atoms are the smallest particles of matter, atoms are always in motion, particles are bumping into each other, and transferring energy.
What is temperature? the measure of the average kinetic energy of all the particles in an object, as kinetic energy increases, temperature increases.
SI units for temperature? Kelvin and Celsius
What is Potential Energy Theory? Atoms exert on an attractive force on each other, atoms join together form molecules, they are connected by bonds that store energy in them.
What is thermal energy? total energy of a substance includes kinetic and potential energy.
First law of thermodynamics? you can add energy to matter by doing work on it.
Second law of thermodynamics? heat always flows from the warmer to the cooler object. The amount of energy going in is equal to the amount going out.
What is endothermic? heat enters and the particles move faster
What is exothermic? heat leaves and the particles move slower
What are some endothermic and exothermic reactions? melting, freezing, evaporation, condensation, boiling
What are the three methods that heat transfer? Conduction, Convection, and radiation
What is Conduction? transferring thermal energy from onepartical to another when they collide(metals are good conductors of heat and electricity.
What is Convection? The transfer of thermal energy in a fluid(liquid or gas)Creates circular motion, hot fluid rises and cold fluid sinks
What is Radiation? The transfer of energy without matter. It can travel through a vacuum.
What temperatures does water change state? 0 and 100
What is heat of fusion? The amount of heat required to convert a solid
What is heat of vaporization? The amount of heat required to convert a liquid into a gas
What causes hurricane, thungerstorms,
Created by: GianaL