# Density Notes - Mrs. Pefanis' earth science home

Density Notes A I M : H OW I S A N O B J EC T S DE N S I T Y D ET ER M I N ED? Why does this happen? Watch the following video clip then answer the question above: http://youtu.be/aR0b4QRhfU0

What is Density? Which one is more dense, a bowling ball or a soccer ball? Even though they are both approximately the same size and shape, the bowling ball is much more dense. Density

It depends on the mass of particles and how closely packed they are. Formula can be found on the 1st page of the ESRT Density: Mass

Volume Find the Density of the cube Mass = 480 grams 480 g =2

8 cm g/cm3 240 cm3 3 cm 10 cm

Density Triangle Volume Density Facts The Density of a substance remains the same regardless of size, shape, or mass of sample. Example: The density of a piece of aluminum

is 2.7g/cm3. If you cut the AL bar in half, what would be the density of each piece ? 2.7g/cm3 Density Facts Continued In what phase are most natural substances the densest?

Solid Phase (ex. Aluminum, lead, steel) However, there is one exception. Water! In what phase is water the most dense? And how do we know this? Liquid- Ice cubes (solid) float in a glass of water (liquid). Phases of Matter

Changing phases of matter animation Ice floats because it is less dense then the liquid. Only 10 % of Ice

floats above the water, while 90% floats below. One of the main reasons

why the Titanic sunk. Density Facts Continued Warm air rises because it is less dense, and cold air sinks because it is more dense.

Lets see Density in action Two Ways To Change Density 1. Temperature As temperature increases density decreases because molecules move further apart. Indirect Relationship 2. Pressure

As pressure increases density increases because molecules move closer together. Direct Relationship Car getting crushed

## Recently Viewed Presentations

• Our aims would be Urinalysis is essential - and if abnormal one should address the issue appropriately keeping in mind that 60% of woemn with a stable bladder will have DO, Glycosuria is an important screen for DM which is...
• GaFutures.org. Ga Futures.org is an online resource to help Georgia students and their families prepare for their future after high school. Some of the activities you can do on GaFutures.org include: Take an interest inventory. Research careers.
• Craft & Structure. What details form the text help you understand the author's point of view about throwing things away. Details include "some of things we're throwing away are poisoning the Earth and will eventually poison all of us and...
• Write an analytical text explaining how Krakauer uses structure and style to show his shifting feelings toward his subject, Chris McCandless. Be sure to: Begin with a statement that presents your analytical statement and use commentary to link your evidence...
• Fonte: Indústria de Processos Químicos - SHREVE, R. N. Tabela 2 - Título da Tabela TÍTULO DO SEU SEMINÁRIO Subtítulo TABELA OCUPANDO DUAS PÁGINAS Propriedade Definição Função Gramatura peso de um centímetro quadrado do material arbitrada na produção, característica intrínseca...
• RUG III -44 OLD Medicaid. Index maximizing. Some care delivered prior to admission impacted RUG. Group. Dr's orders and visits. Depression only recognized in Clinically Complex. Behavior and Impaired Cognition had separate categories. ADL range 4-18. RUG IV 57 New...
• Competency: 206.00 Draw wall sections and details Objective: 206.03 Apply concepts of wood frame wall construction. Wood Frame Wall Construction Materials Wood studs should Be straight Have good stiffness #2 grade or better Moisture content of 15-19% Wood Frame Wall...
• 2. Words are made up of morphemes, the smallest grammatical units. Morphemes are abstract grammatical entities that are realised as morphs, eg the plural morpheme in standard English is currently realised by the morph {-s} but archaic and dialectal forms...