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# Properties of Matter

### unit 2 test

What is matter? objects that take up space and have mass
What are the 3 properties of matter? density, mass volume
What is Mass? a measure of the amount of matter in an object
How do we measure mass? we use a triple beam balance
What is the unit of measurement of mass? grams
Define volume the amount of space in an object
How do you find the volume of a solid? V= LxWxH ; measured in cm3
How do you find the volume of a liquid? use a graduated cylinder; measured in mL
How do you find the Volume of an Irregular Object? V= Final Volume - Initial Volume
Define Density the amount of mass packed into a certain volume
What is the formula for density? D= M / V
How can we tell if an object will sink or float? float= density less than water ( less than 1.0) sink= density more than water ( more than 1.0)
What is the density of water? 1.0 g/mL
When an object is cut in half, what property does not change? Why? Density does not change. SInce there is less mass in a smaller amount of volume, you get the same amount for the density.
Define Weight the measurement of the pull of gravity on an object
How do we measure weight? on a scale
What is difference between weight and mass? -the mass of an object does not change when an object's location changes - weight, on the other hand, does change with location
What are the 3 states of matter? solids, liquids, gas
Characteristics of SOLID atoms of a solid are packed closely together. They bond together and do not change shape.
What is the shape of a solid? definite shape
What is the volume of a solid? definite volume
what are some examples of solids? ice
Characteristics of a LIQUID teh atoms in a liquid are close together and slide around
What is the shape of a liquid? no definite shape; takes shape of container
what is the volume of a liquid? definite volume
What are some examples of a liquid? soda, river, water
Characteristics of GAS the atoms in a gas are spread out and move freely
What is the shape of a gas? no definite shape
what is the volume of a gas? no definite volume
what are some examples of gases? oxygen, helium, carbon dioxide
Phase Change: Freezing the substance changes from a liquid to a solid
Phase Change: Melting the substance changes back from the solid to the liquid
Phase Change: Condensation the substance changes from a gas to liquid
Phase Change: Evaporization the substance changes from a liquid to a gas
How do substances change phases/states? during a phase change, energy is either absorbed or released
During what phase change is energy being increased? Solid-->Liquid Liquid-->Gas
What is happening when energy is being increased? particles are moving faster as energy is absorbed
During what phase change is energy being decreased? Gas-->Liquid Liquid--> Solid
WHen is energy being absorbed? melting and evaporation heat is gained
what happens to the molecular movement when energy is absorbed and heat is gained? during thesis phase changes, molecular movement increases
What happens to the molecules when energy is absorbed and heat is gained? molecules become less tightly bonded and there is a weaker attraction
When is energy released? during freezing and condensation when energy is released, heat is lost
what happens to the molecular movement when energy is released and heat is lost? during these phases stages, molecular movement decreases
what happens to the molecules when energy is released and heat is lost? molecules become more tightly bonded and there is a strong attraction
What is the relationship between temperature and energy? Increase in temperature, Increase in energy ( movement of molecules)
How does a solid change into a liquid? melting
How does a liquid change into a solid? freezing
How does a liquid change into a gas? evaporation
How does a gas change to a liquid? condensation
What is condensation? you can see condensation; change of gas into liquid
What are real life examples of condensation? water droplets on a shower door after show, moisture on the outside of a cold gas or can
What is evaporation? process by which water changes from a liquid to a gas
what are real life examples of evaporation? water boild and turns into steam floor drying after you mop it
What is the boiling point of water? 100 degrees Celcius 212 degrees Farenheit
What is freezing point of water? 0 degrees Celcius 32 degrees Farenheit
WHat is the relationship between freezing and energy? when a liquid is cooled, the average energy of the molecules decrease
Melting Point, Boiling Point, Freezing POint temperature at which soid changes into a liquid ( melting), liquid into a solid ( freezing), or liquid changes to a gas ( boiling)
What is a physical change? a change that alters the appearance of an object; no new substance is formed
what is an example of a physical change? bending, crushing, ripping, dissolving S-->L-->G is an example. No new substance, just a change in their appearance
What is a chemical change? a change in matter that produces one or more new substances
What is an example of a chemical change? breaking down water into hydrogen rusting of fence coal bruning in a furnace
Created by: MsRegan