ch 3
Terms
undefined, object
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- physical property
- is a characteristic of a substance that can be observed without changing the identity of a substance.
- matter
- anything that has volume and has mass
- alloys
- the misture of two or more metals
- weight
- measures the amount of force gravity places on the matter.
- volume is written
- as a cubic measurement
- freezing
- the process of a liquid changing to a solid
- weight can vary based on the gravity at a location( earth or moon)
- true
- a way to separate water and salt would be
- to boil the salt water.Water will vaporize and the salt remains in the container
- crushing,stirring and temperature effects
- are ways to speed up the dissolving procees
- hydrogen
- is explosive gas that burns easily
- water is the most common solvent on earth because has the ability to dissolve many substances
- true
- solute
- is the substance that is dissolved
- the particles in gases
- are very active,they have a weak attraction,they repel
- volume
- is the amount of space that it takes
- standard masses
- created to standarized the mass measurements in the world
- mass
- measures the amount of matter
- three stages of matter
- solid,liquid and gas
- Density
- is the amount of matter in a certain space
- multiply length,width and height---and water displacement
- two methods use to measure volume
- ice-cream could change from solid to liquid
- true
- the more solute that touches the solvent,the faster the solute dissolves
- true
- two boxes are the same side.One is filled with rocks and the other one filled with cotton.The two boxes have the same volume.Which one has less mass?
- cotton
- which object has less density than lead
- gold
- solid stage
- is a state of matter in which a substance has a definite volume and shape.
- Liter (L)
- standard unit of metric measurement for volume
- How do you know that the physical change in water does not changed the structure of water
- because in all three stages still water
- which sense could help us determine the physical properties of a texture
- touch or feel
- which one of this objects has the less density ,water,wood or cork
- cork
- solubility
- is the ability of a solvent to dissolve a solute
- mass
- the amount of material in a substance
- liquids
- takes the shape of a container is in it.
- boiling point
- the temperature at which a substance start boiling(bubbles of gas rise)
- substance
- term use to refer to matter
- physical change
- is a change in matter that does not form a new substance.
- evaporation
- another form of vaporization
- how is granite an example of the mixture that is not evenly mixed ?
- because granite is made of several kinds of minerals mixed to form it and are not spread evenly throughout the mixture.
- aerosol
- is a mixture of liquid and gas
- making jelly requires that a lot of sugar be dissolved in the fruit juice.Why do you think that most jelly recipes instruct you to boil the juices before adding sugar ?
- because sugar dissolves at a faster rate when the solvent is hot.
- a substance evaporates
- when changes from liquid to gas without boiling
- water boils at
- 100 degree centigrades
- melting point
- the temperature at which a solid changes to a liquid.
- cake,rust,salt,coca -cola
- are the results of chemical change
- the oxigen we breathe and the carbon dioxide plants need are the most common gases in the air
- true
- dissolving
- is the process in the particles separate and spread evenly troughtout the mixture
- physical change also occurs when matter changes from one state to another
- true
- oxigen
- is needed to burn many other things
- density is calculated
- by dividing its mass by its volume
- which object has more density than gold
- silver
- which substance dissolves faster,rock salt or a teaspoon of salt ?
- teaspoon of salt
- which object has more density the water or ice
- ice
- which sense could help us determine the physical properties of color
- vision
- freezing point
- the temperature at which a substance changes to a solid
- in an sweet ice tea,tea is the solvent
- true
- the particles in a solid state
- has strong attraction,do not move very much
- oil and vinegar is a mixture
- true
- molecules
- is when atoms are joined with others to form a particle
- 1g
- the mass of a paper clip
- solution
- is a mixture in which all substances are spread evenly throughtout.
- mass and volume are the two ways used
- to measure matter
- mass can change only as the amount of matter changes
- true
- breaking a rock with a hammer into smaller pieces will change the rock size,but the pieces still rock.
- an example of a physical change
- what is the difference between mass and weight ?
- mass is the amount of material(matter) in a substance, and weight measures the amount of force gravity places on the matter.
- the different between mass from weight is that mass is the amount the material in a substance and weight is the amount of force gravity place an a object
- true
- scientists usually used milliliters to
- describe the volume of a liquid
- water displacement
- method use to measure volume of irregular shaped objects
- multiply length,width and height
- to measure the volume of regular shapes,such cubes and rectangular solids.
- milliliter
- is equal to one cubic centimeter (cm3)
- an example of the three stages of matter
- water(liquid),evaporation(gas) and ice(solid)
- some mixtures separates and must be mixed again by shaking.For example ,orange juice,some liquid medicines,shaving cream and paint.
- true
- what is all matter made of ?
- atoms
- nickel coin
- an alloy of nickel and copper
- in a soft drink solution,the gas(carbon dioxide) is the solute and the liquid the solvent
- true
- one molecule of water is made up of two atoms of hydrogen and one atom of oxygen.
- true
- physical properties can be observe with our senses
- true
- concentration of a solution
- is the amount of solute(more than normal) that is dissolved in the solvent
- the temperature at which a substance changes from one stage to another is an example of physical property
- true
- table salt
- made up of chlorine and sodium
- saturated solution
- is when the solvent holds all the solute that it can be dissolved.
- gas stage
- is a stage of a matter in which a substance does not have a definite shape or a definite volume
- O2 is a molecule formed of two oxigen atoms
- true
- 1kg
- the mass of a one- liter bottle of water
- gases can expand to fill the volume of a container
- true
- water,juice and gasoline
- are examples of liquids
- liquid stage
- is a state of matter in which the substance has a definite volume but not a definite hape.
- which sense could help us determine the physical properties of odor
- smell
- air is a solution of gases
- true
- pencils,donuths and pizzas
- are examples of solids
- snack mix(peanuts,pretzels and raisins),strawberries and ice cream,granite and sand on the beach.
- are examples of mixtures because you can taste or easily identify each substance independly from the other.
- chemical change
- is the process of two or more elements or compounds combining to form a new substance
- water is a compound
- true
- adding marbles to a bowl filled with water rises the volume of water.The volume of the marbles is equal to the new water level minus the original water level.
- is an example of water displacement
- the particles in liquid state
- move more than those in the solid state
- a compound
- is a combination of atoms from different elements
- solidifying
- another name for freezing
- in salt water,the salt is the solute
- true
- vaporization
- the process of changing from liquid to gas
- diluted solution
- is when there is less than a normal amount of solute in the solvent
- mixture
- consist of two or more substances that are physically combined keeping their own identity.
- rust
- a result of a chemical change when the oxigen in the water and iron combine.
- what would be the density of an object that has a mass of 24g and a volume of 3 mL
- 8g/mL
- balance
- instrument used to measure mass
- 0 degrees(32 degree F)
- Ice melts
- air in a tire and helium an a ballon
- are examples of gases
- atoms
- a small particle that made up the matter
- scientists usually used cubic centimeters to
- describe the volume of solids.
- element
- a matter that is made up the only one kind of atom
- matter can not be created or destroyed but it can be changed from one form to another.
- true
- graduated cylynder or container
- a container divided into equally market parts.
- volume and mass
- are characteristics of matter that can be measure
- you would weight more on earth than the moon
- true
- rainy water evaporates
- true
- melting
- a process of a solid changing to liquid
- the solute and solvent of a solution can be solid,liquid or gas
- true
- a molecule of water contains two elements
- oxigen and hydrogen
- what two things determine a substance state of matter
- shape and volume
- g and Kg
- metric units of mass
- How are evaporation and boiling alike ? How are they different ?
- evaporation and boiling are alike because both are the process of liquid changing to gas,and they are different because in the evaporation process substances change from liquid to gas at temperatures below boilin point..
- each substance an a mixture can be separated from the mixture by shaking, by how they look or by removing the least dense liquid.
- true
- some solutes like sugar can be dissolved at a much faster rate when hot
- true
- mL
- a smaller unit of measurement for volume
- universal solvent
- water
- solvent
- is the substance that dissolves the other substance