examples: olive oil has 0.85 g / cm 3 (or 0.85 g / ml). 1 ml of olive oil has a mass of 0.85 grams....

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Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3 . 1 cm 3 of iron has a mass of 7.8 grams. Maple wood has 0.7 g / cm 3. 1 cm 3 of maple wood has a mass of 0.7 grams. Glass has 2.5 g / cm 3. 1 cm 3 of glass has a mass of 2.5 grams.

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Page 1: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

Examples:

Olive oil has 0.85 g / cm3 (or 0.85 g / mL).1 mL of olive oil has a mass of 0.85 grams.

Iron has 7.8 g / cm3.

1 cm3 of iron has a mass of 7.8 grams.

Maple wood has 0.7 g / cm3.

1 cm3 of maple wood has a mass of 0.7 grams.

Glass has 2.5 g / cm3.

1 cm3 of glass has a mass of 2.5 grams.

Page 2: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

Sink or Float in Water?

Material Density (g/cc) Sink or Float?4. Copper 8.93. Brass 8.42. Steel 7.61. Aluminum 2.76. Acrylic 1.25. Oak 0.87. Nylon 1.19. Pine 0.4 10. Poplar 0.6 8. PVC 1.312. Polypropylene 0.9 11. Ironwood 1.2

Page 3: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

Floating / sinking rule for fresh water:

If the object’s density is LESS

THAN 1 g/cc, then it will FLOAT

If the object’s density is GREATER THAN 1 g/cc, then it

will SINK

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=qYNwkXcq2K53lM&tbnid=qCsgyEa5NzT4bM:&ved=0CAUQjRw&url=http://ngyimhontom.wordpress.com/2013/06/19/hofmans-floating-duck-in-hk/&ei=bx9PUsiqMpSv4APgsIDoDw&bvm=bv.53537100,d.dmg&psig=AFQjCNGVUuSaB0MsONQcgu0QaroAoN9_Vw&ust=1381003489636125

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=Gq0w4S_jczd3mM&tbnid=sETqQf5pZbvA1M:&ved=0CAUQjRw&url=http://www.extremefunnyhumor.com/picture.php?id=1173&ei=TyBPUpDQGtT64AOinYDIDQ&bvm=bv.53537100,d.dmg&psig=AFQjCNFfduqUvkwc23p9S_Lni1z1ocbMeg&ust=1381003677503250

Page 4: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

So how can a ship that weighs several tons float on water???

Hint: Look at the simplified cross-section of a boat below:

Page 5: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

• Most of the inside is open space. • So most of the volume of the boat is

made up of air!• So when you take into account all the

metal and the air, the average density of the boat is less than 1 g/cc!!

Page 6: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

What about other liquids?

The density of rubbing alcohol

is about 0.8 g/mL

The density of polypropylene

is 0.9 g/cc

Polypropylene will SINK in rubbing alcohol because polypropylene is more dense than

rubbing alcohol.

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=xacusti1sXuD2M&tbnid=2qGe2xA0DtpblM:&ved=0CAUQjRw&url=http://www.scholastic.com/teachers/article/clip-art-march&ei=iaNSUufwK5ax4APEpYHQCw&bvm=bv.53537100,d.dmg&psig=AFQjCNEBzcpO-3hyo_8QuXbiBHA9Y4g4DQ&ust=1381233919190407

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=FVIrORQ4MKkb-M&tbnid=vmRFXwO1-wwCgM:&ved=0CAUQjRw&url=http://www.hotukdeals.com/misc/solved-1537159&ei=s6NSUqy0OZaq4AOcrYHgBA&bvm=bv.53537100,d.dmg&psig=AFQjCNE1-7LrWYFONXSRCcr9ZuHMp-BW2A&ust=1381233962765109

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=6_d-d_2BtwXeBM&tbnid=YDiT1R5ZTVWh4M:&ved=0CAUQjRw&url=http://www.polyvore.com/equals_sign_history/thing?id%3D52783541&ei=4KNSUu8xifrgA_yMgZAG&psig=AFQjCNHRtmJssPGZ87CQl-8yHvklXxkM6Q&ust=1381233997794934

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=E4x5PkAiIWQK9M&tbnid=-r0rxr9BmNb37M:&ved=0CAUQjRw&url=http://en.wikipedia.org/wiki/File:Question_mark_(black_on_white).png&ei=PaRSUrOvO6_k4AOZ64HwAg&psig=AFQjCNH3ZeV2u46FdElww25pPSIPTbyQZg&ust=1381234049218466

Page 7: Examples: Olive oil has 0.85 g / cm 3 (or 0.85 g / mL). 1 mL of olive oil has a mass of 0.85 grams. Iron has 7.8 g / cm 3. 1 cm 3 of iron has a mass of

General Rule:A substance will SINK in

a substance that is less dense than itself.

A substance will FLOAT in a substance that is more dense than itself.

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=FxMo3aOr1XNIFM&tbnid=VFYlcqa0ug1snM:&ved=0CAUQjRw&url=http://www.flickr.com/photos/bobswanson/5797462617/&ei=i6tSUobdBbTe4APP-ICoDQ&bvm=bv.53537100,d.dmg&psig=AFQjCNFmDbVTagPJH8cu-4tbrreZvdnheQ&ust=1381235937621761

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=3LDQZMMFGLjWaM&tbnid=Do1BtcVrDQ6GXM:&ved=0CAUQjRw&url=http://designtaxi.com/news/358971/Cat-Shaped-Marshmallows-Decorate-Hot-Beverages/&ei=4KtSUo7zGu6j4APtjYHAAQ&bvm=bv.53537100,d.dmg&psig=AFQjCNHPw31begMwzH_jRT8EOZq-9RfOpg&ust=1381236036742840

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