Chapter 1
Flows and takes the shape of a container.
Liquid (macroscale appearance)
Increasing the kinetic energy of a substance will lead to what phase change(s)?
Melting and evaporating
From the article "Liquid Oxygen" it states that oxygen has what level of molecular attraction? (High, medium, low)
Low
Molecule
Atmosphere
Hydrosphere
Geosphere
Biosphere
Has no visible shape and fills the container.
Gas (macroscale appearance)
Decreasing the kinetic energy of a substance will lead to what phase change(s)?
Condensation & Freezing
When increasing kinetic energy of a substance, when does the phase change occur?
Scale
Hard solid rock
Holds its shape and does not take the shape of the container.
Solid
When transferring energy to or from a substance it can change the molecules ______________________.
Freedom of movement
When decreasing the kinetic energy of a substance, when does a phase change occur?
Energy decreases enough for attraction to pull molecules together.
The pull between two molecules that is always same for a substance.
Molecular attraction
Name 3 types of rock.
Sedimentary
Igneous
Metamorphic
What happens to the molecules of a substance as it changes phases?
Molecules move differently.
Give one example of something that melts and something that burns when placed in fire.
Melts = Chocolate
Burns = Wood
(Answers may vary)
TRUE
A noticeably different form or state of the same substance
Phase
How many copies of each gene does a person receive from their parents?
2 copies
What happened to the liquid in Titan's lake?
It evaporated.
What caused the liquid methane to change phase from 2007 to 2009?
Transfer of energy from the sun
(increased kinetic energy, speed, temperature)
Why didn't the liquid methane change phase before 2007?
Not enough energy transferred to overcome the molecular attraction
The way molecules in a substance move relative to each other.
Freedom of movement
Transport molecules to your cells.