Vocabulary
What is an object with a definite shape?
Regular Object
A sample of a metal has a mass of 23.4 g and a volume of 3.0 mL. What is the sample’s most likely identity?
A. Aluminum (2.8 g/mL)
B. Iron (7.8 g/mL)
C. Copper (8.9 g/mL)
D. Gold (19.3 g/mL)
B. Iron (7.8 g/mL)
What is an instrument used to measure mass very precisely?
Triple Beam Balance
A square chunk of plastic has a length of 5 cm, width of 5 cm and height of 5 cm. It has a mass of 200 g. What is it’s density
1.6
What is the formula for volume?
V=M/D
What is an object that does not have a definite shape?
Irregular Object
What is the density of a substance with a mass of 15.0 g and a volume of 5.0 mL?
A. 0.33 g/mL
B. 3.0 g/mL
C. 10.0 g/mL
D. 20.0 g/mL
B.3.0 g/mL
This tool measures grams. What tool is it?
Triple Beam Balance.
An object is a regular, rectangular, solid with dimensions of 2 cm by 3cm by 2cm. It has a mass of 24 g. Find its density
2
What is the formula for mass?
M=D*V
What is the amount of matter in a substance that is measured in g or kg?
Mass
A student measures the mass and volume of a small cube made of an unknown metal. The mass of the cube is 25.0 g, and the volume of the cube is 3.19 cm3 . The student is told that the cube is a sample of one of the four metals listed in the table.
Density of Four Metals (g/cm3 )
Gold 19.30
Iron 7.85
Silver 10.50
Tin 7.28
Iron
What is used to measure the volume of a liquid?
Graduated Cylinder
An object has a mass of 48 g and it has a height of 5 cm a width of 2 cm and a length of 5 cm. what is the density of the object?
0.96
What is the formula for Density?
D=M/V
What is the amount of space occupied by an object, measured in mL or cm3?
Volume
Did you know that an unopened 355 mL can of diet Dr. Pepper will float in a lake? That’s a fact! However, it’s also a fact that an unopened 355mL can of regular Dr. Pepper will sink in that same lake! Based on these two facts, which type of soda is the least dense? Explain your answer.
Diet Dr. Pepper!
What tool measures mL?
Graduated Cylinder
A rock dropped in a graduated cylinder raises the level of water from 20 mL to 35 mL. The rock has a mass of 45 g. What is the density of the rock?
3
What is the formula to calculate the volume of a regular object?
What is the amount of matter in a certain space; ratio of mass to volume; unit may be in g/cm3 or g/mL?
Density
A student has two objects. Object 1 has a mass of 10 g and a volume of 5 cubic centimeters. Object 2 has a mass of 10 g and a volume of 20 cubic centimeters. If both objects are placed in water, which will float and why?
Object 2.
What is a curve in the surface of a molecular substance (water, of course) when it touches another material?
Meniscus.
A liquid has a density of 1g/mL. If you have 50mL of the liquid, what would its mass be?
50
How do you calculate the volume of an irregular object?
By using a graduated cylinder to calculate water displacement.