Particles

F1 IS T2

Anything that has mass and takes up space.

Matter

The three forms matter can exist in - solid, liquid, and gas.

States of matter

A state of matter with fixed shape and volume, where particles are closely packed and vibrate at fixed positions.

Solid

A state of matter with varying shape but fixed volume, where particles move around each other.

Liquid

A state of matter with varying shape and volume, where particles are far apart and move freely in all directions.

Gas

Brownian motion is the random movement of particles, demonstrated by pollen grains in water, explained by _______ as collisions between _______ ______ and .p_______ ______

Einstein, water particles, pollen grains

Process where particles of a substance mix with particles of a solvent, explained by the separation and mixing of particles.

Dissolving

Thermal Expansion & Contraction is where particles move further apart when heated and closer together when cooled, affecting the _____ of a substance.

volume

Force exerted by gas particles on a surface, explained by particles moving freely and hitting the walls, leading to applications like aerosol cans and airbags.

Gas Pressure

Freezing (Change of state from ______ to ______, occurring at a fixed _____ for certain substances under a fixed p_____.

liquid, solid, temperature, pressure.

Condensation (Process of _____ turning into _____, observed in daily examples like ___ formation and ______ formation)

steam, water, ice, cloud

Melting (Change of state from _______ to ______)

Solid to liquid

Which 3 scientists thought up of the basic ideas of particle theory? (D___, E______, R_____ B____)

Democritus, Einstein, Robert Brown

Difference between melting & dissolving — Particles __________ (3 words) when dissolving and can ___________ (2 words) when melting. Separate 2 answers with a coma.

separate and mix, move around

Arrange the degree of expansion of the 3 states of matter in descending order. (The most, neutral, the least)

Gas, liquid, solid

Give a unit example of density

g/cm3

Formula for density (____/______)

mass/volume

What are the 2 units for gas pressure? (_____, __/_)

Pascal, N/m2

The Principle of Floating

A substance with a lower density floats on one with a higher density

Why gas pressure increases — particles _____ _______ and hit walls more ________

move faster, frequently