What is Matter?
True or False
Liquids have a definite shape
False
melting
Heat is the transfer of _______________ energy
thermal
Temperature is a measure of the average _____________ energy of the particles in a substance
Kinetic
Name one source of radiation
Sun
Fire
matter is made up of these tiny particles
atoms
freezing
liquid to solid
endothermic
the temperature at which particles theoretically stop moving
The pH of an acid is __________ 7
less than
Matter is anything that has __________ & ___________
Mass; Volume
Condensation
gas to liquid
In this reaction, thermal energy is subtracted/ taken away (released or given off), particles contract and move slower
Exothermic
Water freezes at what temperature? (Kelvin & Celsius)
272 Kelvin
0 Celcius
What type of heat transfer is represented in this scenario?
ice melts while holding it in your hand
conduction
2 PARTS
1. matter composed of free floating gas that is positively or negatively charged
2. name one example
1. plasma
2. lightening, neon signs, northern lights, stars
Evaporation
liquid to gas
Name 2 endothermic phase changes
melting & evaporation
Water boils at what temperature? (Kelvin & Celsius)
373 K
100 C
In a swimming pool, the water near the surface is slightly warmer. The warm water rises because of _______________.
Convection
Describe the Particle Theory of Matter
Particle of matter are constantly moving
This change in matter is evident on soda cans and mirrors
condensation
NAme 2 exothermic phase changes
freezing & condensation
What is the value of absolute zero in Kelvin and Celsius?
0 K
-272.15 C
As matter changes from one state to another state, HEAT is _______________
OPTION A: added or removed
OPTION B: staying the same
OPTION A
added or removed