Atoms and Molecules
What are the three parts of an atom?
What are the three phases/states of matter?
Solid, liquid, gas
What is the formula for density?
D=M/V
What are the two types of mixtures?
Heterogeneous and homogeneous
Heat energy can also be called __________ energy.
Thermal
Where are the electrons located in an atom?
The outside, or the shells
close together, moving slowly
1.0 g/mL
What is the definition of a heterogeneous mixture?
Mixed unevenly
From your hand to the water.
Compound or molecule.
What happens to molecules when you change from a solid to a liquid?
They spread out and move faster
If something has a density GREATER than 1.0, what will it do in water?
Sink
What is an example of a homogeneous mixture?
Soda or gatorade
How is thermal energy transferred when you put an ice cube into a warm cup of water?
From the water to the ice.
What is it called where the protons and neutrons are located in an atom?
Nucleus
What happens to energy when you change from a liquid to a gas?
Energy increases, goes up
Ms. Meager will show a picture of a graduated cylinder. What is the VOLUME of the rock?
50 mL
Sugar water would be what type of mixture?
Homeogeneous
How is thermal energy transferred when you put ice cream on your tongue?
From your tongue to the ice cream.
What is an example of a molecule?
H2, H2O, CO2, O2, etc.
What happens to the molecules and the energy when something changes from a solid to a liquid?
The molecules spread out and move more. The energy increases.
If an object has a mass of 10 g and a volume of 5 mL, what is the density of the object?
2.0 g/mL
What is it called that SALT does in WATER?
Dissolves
They are spreading apart and moving faster.