Measuring Accurately
Calculating Volume
Density
Comparing different units of Measurement
Making Claims/Mystery Box
Comparing Measurements
100
What units do we use for measuring Mass?
grams
100
How do you calculate the Volume of a rectangular solid?
a) Length x width x height
b) Radius x Radius x height x 3.14
c) 1.33 x Radius x Radius x Radius x 3.14
a) Length x width x height
100
Density is equal to an object's ____(A)_____ divided by its _____(B)_____
(A) = Mass
(B) = Volume
100
Which of the following is about 1 cm in size:
a) a pencil eraser
b) the distance from floor to your waist
c) a sheet of paper
a) A pencil eraser
100
6 students solve math problems while listening to music, then solve the same number and difficulty of math problems when the room is quiet.
4 students solve the problems faster with no Music. 1 student takes the same amount of time. 1 student solves the problems faster when there is music.
Which claim can be made based on this data?
a) All students work better in a quiet room
b) Music helps students work faster
c) Most students work faster in a quiet place
c) Most students work faster in a quiet place
100
Which is larger, a centimeter or a meter?
A meter is larger than a centimeter
200
Which two units can we use to measure Volume?
a) grams b) mL
c) cm^3 d) inches
b) mL
c) cm^3
200
How do you calculate the Volume of a Cylinder?
a) Length x width x height
b) Radius x Radius x height x 3.14
c) 1.33 x Radius x Radius x Radius x 3.14
b) Radius x Radius x height x 3.14
200
Calculate the density of a rectangular block with the following data:
Mass = 75 g,
Length = 2 cm, Width = 3 cm, height = 5 cm
Density = 2.5 g/cm3
200
Which of the following is about 1 meter in length?
a) A paperclip
b) A sheet of paper
c) The height of our lab tables
d) A lap around the track
c) The height of our lab tables
200
Two Graduated Cylinders each have an initial water level of 20 mL. Students put Cube A and Cube B into the Graduated Cylinders, one in each cylinder. The cubes rise the same amount. Does this mean the Cubes have the same mass or the same Volume.
Same VOLUME - the Graduated cylinder measures how much space that something takes up.
200
Which is larger, a foot or a meter?
A meter is larger than a foot
300
Measure the length of the long side of a dry erase board, in centimeters.
30.0 cm
300
What is the Volume of a Box that has the following dimensions:
Length = 4 cm, Width = 3 cm, Height = 8 cm
**Don't forget Units!
96 cm^3
300
Draw an object that has the same mass, but is more dense, then explain how your object shows greater density.
Object can have the same number of dots, but smaller size.
The key is more dense means the mass is more tightly packed.
300
How many mL is 30 cm3?
30 cm3 = 30 mL, because 1 mL = 1 cm3
300
Write a definition for:
Mass
Volume
Mass - the amount of matter something is made of
Volume - the amount of space something takes up
300
How many centimeters are in 1 meter?
100 cm = 1 meter
400
Measure the length of the short side of a dry erase board, in cm.
22.7 cm
400
What is the Volume of a Cylinder can of beans that has a radius of 3 cm and a height of 5 cm?
Volume = 141.3 cm^3
400
Draw an object that has the same Volume, but is Less dense, then explain how your object shows greater density.
Same size, but less dots
Reminder: Size = Volume,
Dots = mass
400
1) Which of the following is the larger measurement?
a) 50.4 cm b) 50.25 cm
2) What is the correct way to write 20 and 1/2 cm?
a) 20.05 cm b) 20.5 cm c) They are both correct
1) A
2) B
400
A graduated cylinder has an initial water level of 18 mL. A rock is dropped into the Graduated cylinder, and the water level rises to 25 mL.
a) What is the Volume of the rock?
b) If the rock has a mass of 21 grams, what is its density?
a) 7 mL
b) 3 g/mL
400
If something is 50 centimeters long, how many meters long is it?
50 centimeters = 0.5 meters (which is 1/2 of a meter)
500
When making a correct measurement, you should always include ___(A)___ digits and an ___(B)__ digit.
What terms go in (A) and (B)?
(A) = known
(B) = estimated
500
Which container has a greater Volume?
Container A: Length = 4 cm, width = 2 cm, height = 5 cm
Container B: Radius = 2 cm, Height = 5 cm (Cylinder)
Container B, the Cylinder!
Volume B = 62.8 cm^3 is more than
Volume A = 40 cm^3
500
A brick has a mass of 800 grams, a Length of 20 cm, a width of 8 cm, and a height of 10 cm.
a) What is the Volume of the brick?
b) Another brick has the same density, but has a mass of 1600 grams. What is the Volume of this new brick?
3200 cm^3
500
About how many cm tall is the average person in our class?
a) between 0 and 50 cm
b) between 50 and 100 cm
c) between 100 and 200 cm
d) between 200 and 400 cm
c) Everyone in our class is between 100 and 200 cm tall!
500
Rock 1 has a mass of 50 g and a volume of 20 mL.
Rock 2 has a mass of 80 g and a volume of 40 mL.
Could these be the same kind of rock? Why or why not?
NO!
The density of Rock 1 is 2.5 g/mL
The density of Rock 2 is 2.0 g/mL
If they were the same kind of rock, they would have the same density.
500
If a table is 160 centimeters long, how many meters long is it?
160 cm = 1.60 meters