Materials
What are the 3 classifications of properties of materials?
Mechanical, Thermal and Electrical properties
This pure substance cannot be broken down into simpler substances by any means.
Element.
How many methods are there to separate homogeneous mixtures?
5
Oxygen is important for this metabolic process in which food is transformed into usable energy.
Cellular respiration
Explain the difference between malleability and ductility.
Malleability: Hammering down into sheets.
Ductility:Being pulled into wires
True or False. The periodic table displays all the known compunds.
False.
True or False. Distillation is a process to separate heterogeneous mixtures.
False.
Why is sulfur essential for life?
It makes up amino acids, proteins and other biomolecules.
Explain what fusibility is and provide an example of a material that has this property.
When a material can be melted from solid to liquid, ex: glass, rubber.
Provide and example of a compound and an example of an element.
Compound: H2O, CO2, NaCl, etc.
Element: Gold, Mercury, Silver, etc.
This separation method uses high-speed spinning to separate components of a mixture.
Centrifugation
What elements is considered the chemical foundation for all life ?
Carbon
Name at least two thermal properties of materials:
Fusibility, Thermal Conductivity and Thermal Resistance.
Is oil a compound or a mixture?
It is a mixture of different compounds.
A separation method to separate the components of an homogenous mixture (pigments, medicine, etc.)
True or False. Before living beings can use nitrogen, it needs to go through the chemical process of Nitrogen Flexation.
FALSE
There are a total of 5 mechanical properties of materials, name all of them.
Fragility, Hardness, Ductility, Malleability and Elasticity.
True or False. All mixtures can be separated by chemical means and all compounds can be separated by physical means.
False.
In your own words, explain how distillation works.
A mixture of two liquids with different boiling points is boiled, the mixture with the lowest boiling point will evaporate and then condensate into a different flask.
What element in CHNOPS makes up most of DNA and RNA?
Phosphorus