Science test 2 Flashcards
What are Physical properties?
Properties we can observe with our senses
- Density
- Shape
- Viscosity
What are Chemical properties?
A substances ability to interact with another substance
- Temperature
- Precipitate
- Combustibility
What is Solubility? What is Reactivity?
The ability for a Solute to dissolve in a solvent. Two substances reacting to create a new one.
What is a Physical change?
Change in state or shape of a substance.
What is a chemical change?
Change in identity and substance of original materials.
What questions should you ask to find out what change it is?
Is it a new substance?
Is it reversable?
Hints of chemical change….
Bubbling, Gas formed Heat or light being given off Precipitate formed Hard to reverse
What is matter?
Anything that has mass and takes up space
What is measure of quantity done with?
kg, g
Weight is the measure of the pull of gravity, how is volume measured?
l, ml
What are the changes of state thoughout the states of matter?
Sublimation, depostition, evaporation, condensation, melting, freezing,
Solid
Shape =
Volume =
Constant
Constant
Liquid
Shape =
Volume =
Changes
Constant
Gas
Shape =
Volume =
Changes
Changes
When being heated energy is ________ When cooling down energy is ________
Absorbed Released
Particle Theory ….
1 - All matter is made of particles
2- All particles of one substance are the same, different substances have different substances have different particles.
3 - The spaces between paricles are large compared to the size of the particle
4 - Particles are always moving, the more energy they have the faster they move
5 - There are attractive forces between particles, the closer they are the stronger the forces.
Matter is made up of ________ and ____ ________ which are made of …
Pure substances and mixtures, Mixtures are made up of homogenous and heterogenous mixtures, pure substances are made up of Elements and Compounds
Pure substance is ______ Mixtures are _________
One type of particle ( a pure substance cannot be seperated ) / Multipule substances
The smallest building block is an ______
atom
A solution is _____ a colloid is _____
A clear mixture which light flows through / A cloudy mixture which light can’t pass through
A diatomic atom is …
Two atoms composed to the same element
A Homogenous Mixture is …
A uniform mixture where the different substances are not apparent
A Heterogenous mixture is …
More than one substance not chemically bonded
Different mixtures are visible
They can be seperated
Suspention is when …
Mixtures are combined at first but layer after time.
