Science c4 Flashcards
what is the word equation for photosynthesis?
carbon dioxide+water———–>oxygen+glucose
what is needed for the first stage of photosynthesis?
Light is needed for the first stage of photosynthesis
steel=strong,flexible aluminium=quite strong,not flexible graphite=very strong,very flexible what material is best for a tennis racket?
The aluminium should be the racket because it is strong and not flexible so it wont break.
what is a type of bond?
ionic bond-the ions are held together strongly by the attraction between their opposite changes .
what are giant structures?
Three dimensional arrangement of atoms
what are polymers?
A polymer is a molecule, made from joining together many small molecules called monomers.
How are the properties of materials linked to their bonding?
Different types of chemical bonds and their varying intensity are directly responsible for some of the physical properties of minerals such as hardness, melting and boiling points, solubility, and conductivity.
How can carbon bond?
A carbon-carbon bond is a covalent bond between two carbon atoms.Carbon atoms can also form double bonds in compounds called alkenes or triple bonds in compounds called alkynes.
what are diamond,graphite and graphene all classed as?
Allotrope
What is an Allotrope?
The term allotrope refers to one or more forms of a chemical element that occur in the same physical state Allotropes may display very different chemical and physical properties.
What can diamonds be used for?
Saw blades,drill bits,and grinding wheel
What can Graphite be used for?
Pencils and dry lubricant
What can Graphene be used for?
Bullet proof vests
What are the similarities between diamond,graphite and graphine?
1) All are allotropes
2) All have a giant covalent structure
3) All are strong
What is a property of diamond?
Has a very high melting point (4000 degrees)
