Particles and Matter
List three ways matter can change states
Melting, freezing, condensing, evaporating, sublimating
What is the definition of fluid?
A type of matter that can be poured, gas or liquid, creates a flat surface when in a container
What tool is used to crush materials and increase their surface area
Mortar and pestle
What is the concentration of salt in a solution if there are 42 g of salt dissolved into 200 ml of water?
0.21 g/ml
True or false: A heterogeneous mixture appears as one uniform mixture with no visual separation of the parts?
False
A _________ is made up of two or more different materials, mixed together so well that they cannot be seen
Solution
What does a solvent do, give an example of a solvent
The solvent is the substance dissolving the solute, water is a solvent
Fractioning towers separate different solvents from one another using their __________
Boiling points
If fluid A has a flow rate of 80 ml/s and fluid B has a flow rate of 20 ml/s, which fluid is more viscus?
fluid B
A _____________ mixture is a mixture that looks the same throughout
Homogeneous
________ are the smallest unit of matter
Atoms
What does viscosity affect in a fluid?
What is the purpose of a solar still?
To collect water
If a substance's mass is 950 g and its volume is 200ml, What is its density?
4.75 g/ml
Using a colander or a sieve to separate a mixture is an example of what kind of separation?
Mechanical
The particle model of matter can be remembered using this word
STAMP
(double points if you can list what words STAMP represents)
What tool is used to measure the density of fluids
Hydrometer
Barometer
What is the flow rate of a substance in mL/s if it takes 1 L, 2 minutes to flow through?
8.33... mL/s
The difference between a colloid and a suspension is?
Give an example of each
Suspensions settle into layers given time, colloids do not
Salad dressing (suspension), milk (colloid)
What is the difference between an element and a compound?
An element is a single type of atom, A compound is a set mixture of two or more elements
Hydraulic systems use ________, pneumatic systems use _________
Liquid, gas
What are the two tools you would need to measure an items density?
Scale and displacement flask
What is the pressure being exerted by an object exerting 20 N of force over 100 cm2? Give your answer in pascals
0.2 Pascals
______________ is a technique for separating solutes in a solution based on the weight of each solute in a fluid
Chromatography