Vocabulary
The relative size of things.
What is Scale?
A ________ keeps its shape because its molecules only move in place, not around each other.
What is a Solid?
This is the color of oxygen when it exists as a liquid.
What is Blue?
Jamie's bicycle is made of aluminum. When are the aluminum molecules in her bicycle moving?
The aluminum molecules are only moving when he rides his bike, always moving, or never moving?
What is Always Moving?
____________ is a measure of the average kinetic energy of the molecules of a substance.
What is Temperature?
A group of atoms joined together in a particular way.
What is a molecule?
A _________ can flow because its molecules move around, not away from each other.
What is a Liquid?
This is what you call the temperature at which something burns.
What is a Flash Point?
Anh measured the temperature of a pond near his house. Before he left for school, the water in the pond was 18°C. When he came home from school, the temperature of the pond was higher than it was in the morning. How did the speed of the water molecules movement change while he was at school?
The water molecules started moving faster.
True or False? The molecular attraction of a substance never changes.
What is True?
A noticeably different form or state of the same substance.
What is a Phase?
A __________ does not have a visible shape because its molecules can move away from each other.
What is a Gas?
Over millions of years, this dangerous and recurring event carved out the steep and curving walls of Antelope Canyon in Arizona.
What is a Flash Flood?
This is what happens to the speed of molecules when their kinetic energy decreases.
What is molecules move Slower?
A phase change occurs when the kinetic energy increases enough to overcome the ___________ between molecules.
What is Attraction?
A pull between two molecules that is always the same for a substance.
What is Molecular Attraction?
A _______ _______ is when the molecules that make up a substance experience a change to their freedom of movement.
What is a Phase Change?
The name of the scientist that discovered that all the air around us is matter in the gas phase.
Who is Robert Boyle?
A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the molecules move around each other. What phase did the substance start and end in?
Before, the substance was a gas. Later, it was a liquid.
True or False? Different substances can have either weaker or stronger molecular attraction.
What is True?
This is what scientists call the way molecules in a substance move around relative to each other.
What is Freedom of Movement?
A change at the macro-scale can not be observed by the naked eye. True or False?
What is False?
Before scientists began using physical evidence in their work, most people thought about science based on ideas passed on from this philosopher, nearly 2000 years ago.
Who is Aristotle?
Lily is doing a science experiment with a substance in a sealed jar. At first, the substance’s molecules are moving around each other. What will happen to Lily’s substance if she transfers energy into the substance and causes a phase change?
After the phase change, the substance’s molecules will move (fastor or slower) and become a (solid, liquid, or gas) .
What is Faster and a Gas?
A phase change occurs when the kinetic energy _____________ enough so that the attraction between molecules pulls them together.
What is decreases?