TRUE OF FALSE
Gases have a definite shape and a definite volume.
FALSE - Gases have no definite shape and volume.
A car tire's pressure is measured on a hot day; the pressure is higher because the particles are moving faster and striking the walls with more force. Postulate: ____________________
Energy (Proportional to Temperature)
Which of the following describes a "perfectly elastic" collision?
A. Energy is lost as heat.
B. Particles stick together after hitting.
C. Total kinetic energy remains the same before and after the hit.
D. Particles slow down after every collision.
C. Total kinetic energy remains the same before and after the hit.
The scientific term for the spreading out of gas particles to fill a space is __________.
Diffusion
In a PhET simulation, heating the container causes the particles to hit the walls with much more force. Postulate: ____________________
Energy (Proportional to Temperature)
When gas particles collide, they lose some of their energy as heat or friction.
FALSE- When gas particle collide , they do not lose energy.
An oxygen tank contains billions of particles, yet if you pulled them together, they would take up less space than a single grain of sand. Postulate: ____________________
Size (Negligible Volume)
Which scientists are credited with developing the Kinetic Molecular Theory?
A. Isaac Newton and Albert Einstein
B. Rudolf Clausius, James Maxwell, and Ludwig Boltzmann
C. Robert Boyle and Jacques Charles
D. Marie Curie and John Dalton
B. Rudolf Clausius, James Maxwell, and Ludwig Boltzmann
A gas is composed of particles that are so small compared to the distance between them that their own size is considered __________.
Negligible
What is full name of your adviser and your science student teacher ?
Janet S. Cabael
Narcisa Mae L. Canabe
Compared to solids and liquids, gases generally have a lower density.
TRUE
A student sprays perfume in one corner of a room, and a few minutes later, it is smelled in the opposite corner without a fan. Postulate: ____________________
Motion (Constant, Random, Straight-line)
Why can gas be easily "squeezed" or compressed into a small tank, like an LPG container?
A. Gas particles are very large.
B. Gas particles attract each other strongly.
C. Gases are mostly empty space with negligible particle volume.
D. The particles stop moving when compressed.
C. Gases are mostly empty space with negligible particle volume.
Gas particles are in constant, random, and __________ motion.
Straight-line
Why is the actual volume of gas molecules considered "negligible"?
A. Because gas molecules have no mass.
B. Because the distance between particles is much larger than the size of the particles themselves.
C. Because gas molecules disappear when they hit the walls.
D. Because the particles are moving too fast to be measured.
B.
Gas particles move in random, curved paths.
False- Gas particles move in random, straight paths.
Two molecules crash into each other at high speeds and bounce off without slowing down or getting "tired." Postulate: ____________________
Collisions (Perfectly Elastic)
When gas particles collide with the walls of a container, what is the resulting measurable property?
A. Temperature
B. Volume
C. Density
D. Pressure
D. Pressure
Collisions between gas molecules are perfectly __________, meaning the total kinetic energy remains the same.
Elastic
TRUE OR FALSE : If you double the Kelvin temperature of a gas, the average kinetic energy of its particles will also increase
True (Energy is directly proportional to absolute temperature ).
The average kinetic energy of gas particles is directly proportional to the absolute (Kelvin) temperature.
TRUE
Even though gas particles are constantly moving near each other, they do not pull each other closer like magnets. Postulate: ____________________
Attractions (Negligible Forces)
According to KMT, what happens to gas particles when they are heated?
A. They stick together.
B. They move faster and strike walls with more force.
C. They lose kinetic energy.
D. They change from straight-line to curved motion.
B. They move faster and strike walls with more force.
Because gas particles move so fast and are far apart, they do not __________ together or pull each other closer like magnets.
Stick
The KMT suggests that gas particles act __________ of one another because they are so far apart and move so quickly.
Independently