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# DO NOW - PowerPoint PPT Presentation

Calculate the density for the following objects: A ball with a volume of 10cm³ and a mass of 30g A backpack with a volume of 200cm³ and a mass of 400g A soda with a volume of 100mL and a mass of 100g A safe with a volume of 1m³ and a mass of 2kg. DO NOW.

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Presentation Transcript

Calculate the density for the following objects:

• A ball with a volume of 10cm³ and a mass of 30g
• A backpack with a volume of 200cm³ and a mass of 400g
• A soda with a volume of 100mL and a mass of 100g
• A safe with a volume of 1m³ and a mass of 2kg
DO NOW

To figure the density of liquid, you use the same formula

• Mass/volume = Density
• You first measure the mass of an empty graduated cylinder
• Then, you pour in the liquid and measure its volume
• Next, you find the mass of the graduated cylinder with the liquid inside
• Subtract the mass of the graduated cylinder from the mass of both to find the mass of the liquid
Liquid Density

Each table needs:

• 1 Small Graduated Cylinder (smallie)
• 1 Large Graduated Cylinder (tallie)
• 1 Triple Beam Balance
• Goggles for each student
• Paper and pencil to record results
Liquid Density Lab

Everyone must wear their goggles at ALL times!

• Do not play with the liquids – no drinking spilling, tasting, etc.
• Do not waste the liquids – only use the correct amount
• Any student who is not following the rules will not participate and receive a 0 for the lab
Liquid Density Lab

• Step 2 – Pour 20mL of syrup into your small graduated cylinder
• Step 3 – Measure the mass of the syrup
• Step 4 – Subtract the mass of the graduated cylinder alone from the mass of the syrup – this gives you the mass of the syrup alone
• Step 5 – Slowly pour the syrup into the large graduated cylinder
• Repeat steps 2-5 with the dish soap, shampoo, water, and oil (in this order!)
• Step 6 – Find the density of each liquid
Liquid Density Lab

When finished, wash out your graduated cylinders and return all materials to their proper places

Liquid Density Lab

Liquids that have a lower density will “float” on liquids that have a higher density

• The same is true for solids – if the solid has a lower density than the liquid it’s in – it will float!
Liquid Density

Page 55

• On scratch paper, answer at least questions 1-16
Chapter Review

For the listening competition, someone reads an essay

• You take notes