25: Density

Presentation Cues No one wants to listen to the teacher the whole time;) Volunteer/Class Discussion – quick answer from raised hand (remember/understand) Pair/share – quick chat with neighbor and volunteer or teacher pick share (remember/understand/apply) Group task – longer time for pair or group to apply, analyze, evaluate or create Individual write – personal reflection on topic Rotations – solve the station with group and write answer on paper, rotate with timer and stay with your group 5?Quiz – quick check for understanding about topic

Today we will learn to calculate density by.. NEED TODAY SCIENCE Day 1 Challenge Explanation Millsium Notes WB Practice Gizmo Laboratory

Unit Challenge: Construct Vessel to keep all ponies afloat for 30s

MILLSIUM NOTES: CALCULATING DENSITY https://www.youtube.com/watch? v=- 7iYWyadIfs&list=PLfwolDvYxglipQ7 gc2ciIBViFM_QTzEXp&index=2&t= 92s Stop at 4:50

What is MASS? What is VOLUME? What is DENSITY? SAME SAME SAME DENSITY

What is MASS? What is VOLUME? What is DENSITY? DIFFERENT SAME MORE DENSE

What is MASS? What is VOLUME? What is DENSITY? SAME DIFFERENT MORE DENSE

What is MASS? What is VOLUME? What is DENSITY? DIFFERENT SAME MORE DENSE

What is MASS? What is VOLUME? What is DENSITY? DIFFERENT DIFFERENT SAME DENSITY

What is MASS? What is VOLUME? What is DENSITY? DIFFERENT DIFFERENT MORE DENSE

What is MASS? What is VOLUME? What is DENSITY? DIFFERENT DIFFERENT SAME DENSITY

WB Practice SHOW WORK BOX ANSWER

D= = = 1. Calculate the density 100g mass 2g/mL volume 50mL An object has the measurements of 100g and 50mL. What is it’s density? D= 100g mass = = 2g/mL volume 50mL

2. Calculate the Density D=m/v = 3.5g/1cm3 = 3.5g/cm3

D= = = 3. Calculate the density 128g mass .64g/mL volume 200mL An object has the measurements of 128g and 200mL. What is it’s density? D= 128g mass = = .64g/mL volume 200mL

4. Calculate the Density D=m/v = 7.8g/1cm3 = 7.8g/cm3

5. What is the density of this substance? mass volume 18g D= 3cm3 D= 6g/cm3 Pick any point! -hint, pick a point that has actual numbers on the axis so you don’t have to guess!

6. Which 2 objects have the same density? What is it? Table below shows mass and volume for 3 objects (A, B & C) A B C Mass = 4g Mass = 6g Mass = 8g Volume = 2cm3 Volume = 6cm3 Volume = 4cm3 Formula for calculating density is D=m/v D=m/v =4g/2cm3 = 2g/cm3 D=m/v =8g/4cm3 = 2g/cm3

7. What is the density of this substance? mass volume 100g D= 20cm3 D= 5g/cm3 Pick any point! -hint, pick a point that has actual numbers on the axis so you don’t have to guess!

8. Calculate the density of the object. Mass = 16g Volume = 2cm*2cm*2cm = 8cm3 D = 16g/8cm3 = 2g/cm3 1g 2cm 2cm

GIZMO Login to www.explorelearning.com Go to DENSITY LABORATORY Find MASS of each object by placing on scale. Find VOLUME of each object by placing in graduated cylinder Calculate DENSITY with equation D=m/v Drop object in water (Density = 1g/mL) and record If you get stuck ask for help!!!!

Today we will describe why things float and sink based on density… NEED TODAY Yesterday’s handout SCIENCE Day 2 Millsium Notes Gizmo Analysis Density Boxes Float/Sink Game Gizmo: Density via Comparison

MILLSIUM NOTES: Floating and Sinking https://www.youtube.com /watch?v=NNTErpSyb- c&t=348s&index=1&list=PL fwolDvYxglipQ7gc2ciIBViF M_QTzEXp Stop at 4:50

Gizmo Analysis What do all FLOATING OBJECTS have in common? DENSITY LESS THAN 1g/mL What do all SINKING OBJECTS have in common? DENSITY MORE THAN 1g/mL

What happens if I INCREASE THE DENSITY of the liquid? Gizmo Analysis What happens if I INCREASE THE DENSITY of the liquid? More objects float

What happens if I DECREASE THE DENSITY of the liquid? Gizmo Analysis What happens if I DECREASE THE DENSITY of the liquid? More objects sink

Number off at tables as shown GROUP GAME Number off at tables as shown Everyone writes answer on board Mills rolls dice, number called must hold up correct answer for table to get points Team with most points gets to visit snack drawer! 5 1 2 3 4

1. Which of the following will FLOAT in WATER? Apple Gelatin Marble Wood - Pine .64 g/mL 1.27 g/mL 2.7 g/mL .65 g/mL 1.0 g/mL

2. What will IRON do when placed in MERCURY? Iron (7.6g/cm3) floats in Mercury (13.55g/cm3) .

3. Which of the following will SINK in GASOLINE? Butter Cork Styrofoam Wood - Bamboo .87 g/mL .24 g/mL .20 g/mL .35 g/mL .72 g/mL

4. What would you expect to SINK in Dish Soap but FLOAT in Honey? Dish soap (1.06g/mL) Nylon (1.11g/cm3) Gelatin (1.27 g/mL) Maple Syrup (1.37g/mL) Honey (1.42 g/mL)

5. Which of the objects listed on the chart is the most dense? Platinum (21.3 g/cm3)

6. Why do Helium balloons float? Helium is about 10 times less dense than Air Helium (.0001785 g/mL) Air (.001205 g/mL)

7. Which natural material would make the best raft? Butter Bone Rubber Wood - Bamboo .87 g/mL 1.8 g/mL 1.52 g/mL .35 g/mL

8. Which of the following materials would you suggest the little pigs build their houses out of in a hurricane zone? Brick Cardboard Concrete Iron Wood 1.92 g/mL .68 g/mL 2.4 g/mL 7.6 g/mL .35-.77 g/mL

9. Which sample will settle between Oil and Water?

CER: Will a 14lb bowling ball float in the dead sea? https://www.youtube.com/watch?v=Fmzb6J2a79s

What information from today might help you construct your vessel?

GIZMO Login to www.explorelearning.com Go to DENSITY VIA Comparison Record whether each Object floats or sinks as you drop in each container. Estimate the density based on the way it behaves. If you get stuck ask for help!!!!

Today we will explore Archimedes principles and the constant nature of density NEED TODAY handout SCIENCE Day 3 Lab Analysis Chemical Spill Archimedes Millsium Gizmo Crowns Constant Density Slice and Dice Lab

Think back to simulations… How does the speed of sinking related to the density of an object? Greater density = faster sink How can we get something to hover anywhere in a substance? Same density as the substance it is in

Chemical Spill Calculate Densities Color layers How to separate red?

MILLSIUM NOTES: Archimedes Bath https://www.youtube.com/watch? v=vyJqbDMCTO8&t=1s

2. What is the difference between DENSITY and DISPLACEMENT Density: how many atoms are in a space (mass in a volume) -must be calculated Displacement: method of MEASURING volume of solid by seeing how much water it moves

GIZMO Login to www.explorelearning.com Go to DENSITY LABORATORY Find out Which Crown is Actually Made of Gold!

Density is a Constant Density is the same for any chunk of a substance! Every cm3 of glass has a mass of 2.5g! Every mL of vegetable oil has a mass of .91g! Every cm3 of Hydrogen has a mass of .00008988g! Mass Volume Density 3.3g 1cm3 3.3g/cm3 6.6g 2cm3 9.9g 3cm3 13.2g 4cm3 Mass goes up by the same proportion that volume does! Ratio of Mass to Volume stays the same!

GIZMO Login to www.explorelearning.com Go to DENSITY Slice & Dice Complete chart

Gizmo Tasks to complete today! Density Laboratory Part 2: Find Density of first 12 Objects Part 7: Find Density of Crowns COMPLETE QUIZ Density via Comparison Part 4: Estimate Density of Spheres based on behavior in liquids Density Slice & Dice Part 9: Find how density affected by size of material

Today we will determine the nature of the Mystery Blocks using our science skills! NEED TODAY handout SCIENCE Day 3 Videos How do ships float? Mystery Blocks

Uber cool density column! https://www.youtube.com/watch?v=fE2KQzLUVA4

What are ships made of? Iron (7.6g/mL) How do they float? https://www.youtube.com/watch? v=pnIlE1xD-yM Why did Titanic Sink https://www.youtube.com/watch? v=vjKGYJac0GU

Made of Iron, Full of Air!

What information from today might help you construct your vessel?

Vessel considerations… What is your overall density goal? <1g/cm3 Mass should be less than volume What material should you attempt to incorporate into your design to help it float? Air! How do you want your vessel to look? Wide not deep

Shiny or no? Test w/ light Measure Calculate You’re welcome! Best observation Shiny or no? Test w/ light Measure You’re welcome! Calculate Use chart to match characteristics List of Block #’s based on density

Videos Study Jams Millsium http://studyjams.scholastic.com/studyjams/jams/science/matter/properties- of-matter.htm Millsium