1. Density

2. Sink or float? For this activity you will work in your table groups
You will be given 10 objects. You need to create 5 pairs
For each pair you need to write down 3 observations and predict which one will sink and which one will float, then write your results
You will be given 15 minutes for this activity

4. But first, Some important vocab
Matter: anything that has atoms, mass, and takes up space
Mass: A measurement of the amount of matter (or stuff) in an object or liquid
Volume: A measurement of how much physical space an object or liquid takes up.

5. Which one is more dense?
Which square is more dense?

6. Which one is more dense?
Now which one is more dense?

7. What is density?
Density is a comparison of how much matter there is in a certain amount of space.
To find the density of an object, we use a simple formula D=m/v

8. How do we find volume?
To find the volume of a regular object you take the Length x width x height
Length
Height
Width

9. x What is density? Don’t forget our units! Mass= grams (g)
Volume= cm3 or mL
Density= g/ cm3 or g/mL
Hint: 1 cm3= 1 mL
Mass
Density x
Volume

10. Guided Practice Find the volume of a square that has a
l=4 cm, w=5 cm, and h=3 cm
Given:
Unknown/Units
Equation:
Substitute/solution:

11. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Equation:
Substitute/solution:

12. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
Substitute/solution:

13. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:

14. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3

15. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3

16. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3

17. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3
Given:
Unknown/Units:
Equation:
Substitute/solution:

18. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3
Given: v= 60 cm3 and m= 20g
Unknown/Units:
Equation:
Substitute/solution:

19. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3
Given: v= 60 cm3 and m= 20g
Unknown/Units:
Density= _________ g/cm3
Equation:
Substitute/solution:

20. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3
Given: v= 60 cm3 and m= 20g
Unknown/Units:
Density= _________ g/cm3
Equation:
D=m/v
Substitute/solution:

21. Guided Practice
Find the volume of a square that as a l=4 cm, w=5 cm, and h=3 cm
2. If I told you the mass of that same square of 20 g, what would the density of the square be?
Given:
L= 4 cm, W=5 cm, h= 3 cm
Unknown/Units:
Volume=_____________ cm3
Equation:
V= L x W x H
Substitute/solution:
V= 4 x 5 x 3= 60 cm3
Given: v= 60 cm3 and m= 20g
Unknown/Units:
Density= _________ g/cm3
Equation:
D=m/v
Substitute/solution:
D= 20/60= .33g/cm3