Sink or float?

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Sink or float?Sink or float?

Objects that float in water have a Objects that float in water have a density of _________.density of _________.

Objects that sink in water have a Objects that sink in water have a density of __________.density of __________.

Objects that “flink” in water have Objects that “flink” in water have a density of _________.a density of _________.

If there are 2 graduated If there are 2 graduated cylinders, one filled with alcohol cylinders, one filled with alcohol (D=.8611 g/mL) and the other (D=.8611 g/mL) and the other with water . . .with water . . .

with same mass, compare the with same mass, compare the volumes.volumes.

with same volume, compare the with same volume, compare the masses.masses.

If there is no balance available, how do If there is no balance available, how do we tell which is alcohol and which is we tell which is alcohol and which is water?water?

For each of the next For each of the next slides, make a slides, make a hypothesis of what hypothesis of what you think will happen you think will happen (hypothesis), then (hypothesis), then click to see what does click to see what does happen, then explain happen, then explain why it happens.why it happens.

Place can of Coke and Place can of Coke and Diet Coke in waterDiet Coke in water Hypothesis:Hypothesis: What actually happened:What actually happened:

Why?Why?

Coke held upright in Coke held upright in water then openedwater then opened Hypothesis:Hypothesis: What actually happened:What actually happened:

– Coke stays in can; carbon dioxide Coke stays in can; carbon dioxide leaves the canleaves the can

Why?Why?

Diet Coke placed Diet Coke placed upright in water and upright in water and openedopened Hypothesis:Hypothesis: What actually happened:What actually happened:

– Diet Coke and carbon dioxide both Diet Coke and carbon dioxide both come out of the cancome out of the can

Why?Why?

Orange with peel on Orange with peel on placed in waterplaced in water Hypothesis:Hypothesis: What actually happened:What actually happened:

Why?Why?

Orange without peel Orange without peel placed in waterplaced in water Hypothesis:Hypothesis: What actually happened:What actually happened:

Why?Why?

Grape in 7-upGrape in 7-up Hypothesis:Hypothesis: What actually happened:What actually happened:

– Grape sinks then rises to the Grape sinks then rises to the surface, after a while the grape sinks surface, after a while the grape sinks againagain

Why?Why?

Grape without peel

Grape with peel

Hot and cold waterHot and cold water

Hypothesis:Hypothesis: What actually happened:What actually happened:

– The hot water (red) was on top and The hot water (red) was on top and the cold water (blue) was on the the cold water (blue) was on the bottombottom

Why?Why?

Picture on next slide

Bar of soap in waterBar of soap in water


– All bars of soap sank except the ivoryAll bars of soap sank except the ivory

Why?Why?

Picture on next slide

Dial Lever 2000 Coast

Ivory Dove

Complete each Complete each statementstatement 2 objects of same volume, the object with 2 objects of same volume, the object with

more mass is _______ densemore mass is _______ dense To make 2 different objects have the same To make 2 different objects have the same

mass, increase the volume of the ______ mass, increase the volume of the ______ dense objectdense object

2 objects of same mass, the more dense 2 objects of same mass, the more dense object has a _______ volumeobject has a _______ volume

When keeping volume of a substance the When keeping volume of a substance the same and increasing mass, density ________same and increasing mass, density ________

While keeping mass of a substance the While keeping mass of a substance the same, if volume is increased then the density same, if volume is increased then the density is __________is __________

The relationship between density and volume The relationship between density and volume is ________________is ________________

The relationship between density and mass is The relationship between density and mass is ____________________________

Two liquids, A and B, have densities 0.75 g/mL and Two liquids, A and B, have densities 0.75 g/mL and 1.14 g/mL respectively.1.14 g/mL respectively.When both liquids are poured into a container, one When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top?liquid floats on top of the other. Which liquid is on top?

How many kg of mercury would fill a 5.0 L container if How many kg of mercury would fill a 5.0 L container if the density of mercury is 13.6 g/cm³?the density of mercury is 13.6 g/cm³?

How much space does 1 kg of butter occupy if the How much space does 1 kg of butter occupy if the density of butter is 0.94 g/cm³?density of butter is 0.94 g/cm³?

Four solid cubes have equal mass. Which occupies the Four solid cubes have equal mass. Which occupies the greatest volume?greatest volume?

A)Aluminum (density = 2.7 g/cm3) C) Tin (density 7.3 A)Aluminum (density = 2.7 g/cm3) C) Tin (density 7.3 g/cm3)g/cm3)

B)Glass (density 3.6 g/cm3) D) Lead (density = 11.4 B)Glass (density 3.6 g/cm3) D) Lead (density = 11.4 g/cm3)g/cm3)

A substance is cut into several pieces. As compared to A substance is cut into several pieces. As compared to the density of the original sample, the density of each the density of the original sample, the density of each piece will bepiece will be

A) Greater B) Less C) The SameA) Greater B) Less C) The Same

A 5.00 milliliter sample of a substance has a mass of 12.5 A 5.00 milliliter sample of a substance has a mass of 12.5 grams. What is the mass of a 100 milliliter sample of the grams. What is the mass of a 100 milliliter sample of the same substance?same substance?

A) 40.0 g B)125 g C)400 g D)250 gA) 40.0 g B)125 g C)400 g D)250 g I threw a plastic ball in the pool for my dog to fetch. The mass I threw a plastic ball in the pool for my dog to fetch. The mass

of the ball was 125 grams. What must the volume be to have a of the ball was 125 grams. What must the volume be to have a density of 0.500 g/mL. ( I want it to float of course!)density of 0.500 g/mL. ( I want it to float of course!)

After throwing the ball in the pool for my dog, the ball sprung After throwing the ball in the pool for my dog, the ball sprung a leak and began to fill with water. How many mL of water can a leak and began to fill with water. How many mL of water can the ball absorb before the ball sinks?the ball absorb before the ball sinks?

A little aluminum boat (mass of 14.50 g) has a volume of A little aluminum boat (mass of 14.50 g) has a volume of 450.00 cm450.00 cm33. The boat is place in a small pool of water and . The boat is place in a small pool of water and carefully filled with pennies. If each penny has a mass of 2.50 carefully filled with pennies. If each penny has a mass of 2.50 g, how many pennies can be added to the boat before it sinks?g, how many pennies can be added to the boat before it sinks?

Compare the densities of the blocks in waterCompare the densities of the blocks in water

AnswersAnswers

Sink or float?Sink or float?

Objects that float in water have a Objects that float in water have a density of _________.density of _________.

Objects that sink in water have a Objects that sink in water have a density of __________.density of __________.

Objects that “flink” in water have Objects that “flink” in water have a density of _________.a density of _________.

Less than one

Greater than one

Equal to one

If there are 2 graduated If there are 2 graduated cylinders, one filled with alcohol cylinders, one filled with alcohol (D=.8611 g/mL) and the other (D=.8611 g/mL) and the other with water . . .with water . . .

with same mass, compare the volumes.with same mass, compare the volumes.

with same volume, compare the masses.with same volume, compare the masses.

If there is no balance available, how do If there is no balance available, how do we tell which is alcohol and which is we tell which is alcohol and which is water?water?

Alcohol will have the larger volume because it is less dense so it needs to have more space to spread out the particles

Water will have more mass because it has a higher density, more tightly packed particles.

Find an object that is more dense than alcohol and less dense than water and put into both. It should float in water but sink in alcohol.

Place can of Coke and Place can of Coke and Diet Coke in waterDiet Coke in water Hypothesis:Hypothesis: What actually happened:What actually happened:

– Coke sinks and Diet Coke floatsCoke sinks and Diet Coke floats Why:Why:

– Coke has sugar included in the Coke has sugar included in the ingredients that makes the density ingredients that makes the density more than one (more particles in more than one (more particles in same space increases density)same space increases density)

Coke held upright in Coke held upright in water then openedwater then opened Hypothesis:Hypothesis: What actually happened:What actually happened:

– Coke stays in can; carbon dioxide Coke stays in can; carbon dioxide leaves the canleaves the can

Why:Why:– Coke is more dense than water so it Coke is more dense than water so it

will stay below the water; carbon will stay below the water; carbon dioxide is less dense than water so it dioxide is less dense than water so it rises above the waterrises above the water

Diet Coke placed Diet Coke placed upright in water and upright in water and openedopened Hypothesis:Hypothesis: What actually happened:What actually happened:

– Diet Coke and carbon dioxide both Diet Coke and carbon dioxide both come out of the cancome out of the can

Why:Why:– Diet Coke is less dense than water Diet Coke is less dense than water

so it will rise above the waterso it will rise above the water

Orange with peel on Orange with peel on placed in waterplaced in water Hypothesis:Hypothesis: What actually happened:What actually happened:

– Orange floatedOrange floated Why:Why:

– Orange with peel has a volume Orange with peel has a volume larger than its mass to make its larger than its mass to make its density less than onedensity less than one

Orange without peel Orange without peel placed in waterplaced in water Hypothesis:Hypothesis: What actually happened:What actually happened:

– Orange sankOrange sank Why:Why:

– When taking the peel off the volume When taking the peel off the volume is decreased drastically while the is decreased drastically while the mass is decreased slightly making mass is decreased slightly making the volume less than the mass and the volume less than the mass and the density greater than onethe density greater than one

Grape in 7-upGrape in 7-up


– Grape sinks then rises to the surface, Grape sinks then rises to the surface, after a while the grape sinks againafter a while the grape sinks again

Why:Why:– Grape by itself is more dense than Grape by itself is more dense than

soda, however when the carbon soda, however when the carbon dioxide bubbles attach to the surface dioxide bubbles attach to the surface of the grape the volume becomes of the grape the volume becomes greater making the density of the greater making the density of the grape less than the density of the grape less than the density of the sodasoda

Hot and cold waterHot and cold water


– The hot water (red) was on top and the The hot water (red) was on top and the cold water (blue) was on the bottomcold water (blue) was on the bottom

Why:Why:– The particles in hot water are moving The particles in hot water are moving

faster which causes them to spread faster which causes them to spread out more increasing volume. An out more increasing volume. An increase in volume decreases density increase in volume decreases density making hot water less dense than cold making hot water less dense than cold water.water.

Bar of soap in waterBar of soap in water


– All bars of soap sank except the ivoryAll bars of soap sank except the ivory Why:Why:

– Ivory soap is made with air pockets Ivory soap is made with air pockets inside making the mass less than inside making the mass less than other bars of soap of approximately other bars of soap of approximately the same size, therefore decreasing the same size, therefore decreasing the density of Ivory soap.the density of Ivory soap.

Complete each Complete each statementstatement 2 objects of same volume, the object with 2 objects of same volume, the object with

more mass is _______ densemore mass is _______ dense To make 2 different objects have the same To make 2 different objects have the same

mass, increase the volume of the ______ mass, increase the volume of the ______ dense objectdense object

2 objects of same mass, the more dense 2 objects of same mass, the more dense object has a _______ volumeobject has a _______ volume

When keeping volume of a substance the When keeping volume of a substance the same and increasing mass, density ________same and increasing mass, density ________

While keeping mass of a substance the While keeping mass of a substance the same, if volume is increased then the density same, if volume is increased then the density is __________is __________

The relationship between density and volume The relationship between density and volume is ________________is ________________

The relationship between density and mass is The relationship between density and mass is ____________________________

smaller

decreased

more

less

increases

direct

inverse

Documents

Sink or float?