What was the main idea of the layering liquids lab?
This lab demonstrated the fact that liquids layer according to their densities.
200
What units are used to express liquid volume?
mL
200
What is the definition of mass?
The amount of matter in an object.
200
If a block of a substance has a mass of 10g and a volume of 15 cm^3, what is its density?
0.67 g/cm^3
200
Why do certain objects and liquids float in water?
When objects or liquids have a density of LESS than 1 g/mL they FLOAT.
200
What was the main idea of the density sticks lab?
The main idea of this lab was to demonstrate that size and shape does not affect the density of a specific material.
300
What units are used to express solid volume?
cm^3
300
What is the definition of volume?
The amount of space an object takes up.
300
If a block has a mass of 25g and has a length of 4 cm, a width of 2 cm, and a height of 6 cm what is its density?
D = 0.52 g/cm^3
300
Why do certain objects or liquids sink in water?
Objects or liquid sink in water when they have a density GREATER than 1 g/mL.
300
What was the main idea of the Case of the Missing Crown Activity?
The main idea of this lab was to demonstrate that no two substances have the same density, and density is a physical property that can be used to identify a substance.
400
What units are used to express solid density?
g/cm^3
400
What is the definition of adhesion?
Adhesion is when two different molecules are attracted due to opposite (polar) charge.
400
If a liquid has a density of 0.123 g/mL and a mass of 0.32g what is its volume?
V = 2.6 mL
400
Why do certain objects or liquids suspend in water?
Objects or liquids SUSPEND in water when they have a density of 1 g/mL (equal to water).
400
If a cylinder has a mass of 117g and the dimensions of (radius 0.5 cm and height 4.2 cm) what is its density?
D = 35.48 g/cm^3
500
What units are used to express liquid density?
g/mL
500
What is the definition of cohesion?
Cohesion is when two identical molecules are attracted due to opposite (polar) charge.
500
If a liquid has a volume of 55 mL and a density of 21.3 g/mL what is its mass?
m = 1171.5 g
500
What is the line of separation between liquids called?
The point at which two liquids meet but do not mix is called the interface.
500
Explain how a meniscus forms?
Adhesion between the polar glass molecules and the polar water molecules occurs causing the water molecules to become attracted to the glass causing a dip at the center of the graduated cylinder.