Science idk gr 9 Flashcards
List all 6 changes of state and if they add or take away heat
- melting from a solid to a liquid
- Evaporation gas to liquid.
- Deposition and sublimation gas to solid.
all those are adding heat - Solidification (freeze) liquid to solid
- Condensation gas to liquid.
- Sublimation solid to gas.
taking away heat
What is a pure substance
A pure substance is made up of only one kind of matter, and has a unique set of properties
what is a compound?
A chemical combination of two or more elements
for the picture it’s a circle and a square connected with multiple of them
What is a mixture
is a combination of pure substances
in the picture it’s a bunch of random
What is a mechanical mixture (heterogeneous)
The different substance, in a mixture are visible
what is a homogeneous? (solution)
different substances are that make it up or not visible one substance is dissolved in another
what is suspension
A cloudy mixture, particles of one substance are held within another
what is colour
The colour
what is lustre
The light, a substance reflects, gives it lustre (shine) ex gold
what is conductivity
is the ability of a substance to conduct, electricity, or heat, called a conductor ex most metals
what is density?
is the amount of mass in a given volume of a substance ex pure water
what is ductility?
any solid that can be stretched into wire ex copper
What is hardness
substance, ability to resist, being scratched ex dimonds
what is malleability?
substance that can be poured or rolled into sheets ex aluminum
what is viscosity?
is the resistance of a fluid to flow ex syrup
