2A Understanding Matter
True or False:
All matter is in constant motion in random directions
True!
Particle Model of Matter: all physical matter exists in the form of particles in constant motion.
How many points is a touchdown worth in American football?
6
Which state of matter has a fixed shape?
solid
Iron rusts and becomes iron oxide is an example of what type of change?
A chemical change
Define matter
Anything that takes up space (volume) and has mass.
In The Lion King, who is Simba’s father?
Mufasa
What are the two main classifications of matter
Pure substances and mixtures
Viscosity
When substances melt, they undergo what kind of change?
Physical
A sample of aluminum has a volume of 14.8 mL and a mass of 39.96 g. What is the density of aluminum?
2.70 g/mL
What's the difference between atoms and molecules?
Atoms are the basic building blocks of all matter. A molecule consists of two or more atoms covalently bonded together.
Define element
A pure substance that consists of atoms with the same atomic number. It is the simplest of the pure substances.
What kind of creature is Shrek?
Ogre
True or false:
Matter cannot be destroyed.
True
Law of conservation of matter: matter cannot be created or destroyed
What's the difference between the attractive forces in a solid and liquid and gas?
What's the difference between mass and weight?
Mass is the amount of matter in an object and is measured in grams. Weight is the measure of gravity acting on the matter in an object. Mass cannot be changed on the basis of location, but weight can.
What characteristics make a mixture not a pure substance?
A mixture involves two or more substances physically combined.
Which of the following states of matter are fluids?
a. crystalline solid
b. plasma
c. liquid
d. gas
plasma, liquid, gas
In soccer, what is it called when a player scores three goals in a single game?
A hat trick
How much space will a sample of iridium with a mass of 974 g occupy? Iridium has a density of 22.56 g/mL.
43.2
Which of the following are examples of pure substances?
a. chocolate cake
b. gold
c. saltwater
d. sodium oxide (Na2O)
e. table sugar
Gold, sodium oxide, table sugar
Which of the following are characteristics of liquids?
a. the ability to change shape to match its container
b. close particle spacing
c. changeable volume
d. low compressibility
b. close particle spacing
d. low compressibility
Name two types of physical properties
Ductility, malleability, conductivity, luster
What Disney movie features a villain named Ursula?
The Little Mermaid