Research and Branches of Chemistry
The study of the composition, structure, and properties of matter and the changes it goes through.
Chemistry
The smallest unit of an element that maintains the properties of that element.
Atom
Properties of matter can be used to classify an unknown substance as a member of a certain group or subgroup.
True
Mixtures that do not have a uniform composition throughout. "Different"
Heterogenous
A solid changing to a liquid is which type of phase change?
Melting
What type of research would result in a vaccine to be given so people would not become infected with SARS-CoV2?
Technological Development
A substance that is made of two or more different elements that are chemically bonded.
Compound
Properties of matter that are the same regardless of the amount of matter.
Intensive
Water boiling and changing to a gas (vaporization) is what type of change?
Physical Change
A liquid changing to a gas is which type of phase change & does it release or absorb energy?
Vaporization, absorbs
A person in this branch of chemistry was studying the activity of the brain and hormones that were released during sexual intercourse.
Biochemistry
A combination of two or more atoms of the same kind.
Molecule
Properties of Matter that only deal with the amount of matter.
Extensive
This says that energy cannot be created or destroyed.
Law of Conservation of Energy
What are the 4 states of matter?
solid, liquid, gas, plasma
What type of research would a college intern be doing if she was studying how HIV attacks the human body?
Basic
Name the two general properties of all matter.
Volume and Mass
List 4 properties of matter that can be observed or measured without destroying the identity of the substance.
texture, melting and boiling points, color, odor, state of matter, malleable, ductile, solubility
List 4 homogenous mixtures
What phase change involves a solid changing directly to a gas? Does this release or absorb energy?
sublimation, absorbs
A person in this branch of chemistry would determine the composition of the contents found in a dead dog's stomach.
Analytical
Explain how H2O can be both a molecule and a compound.
If you only have 2 hydrogen atoms and an oxygen atom bonded, then you have a 1 molecule of water. If you have a bunch of molecules of water, then you have a compound of water, like a glass or drop of water.
List 4 properties of matter that relate to the substances ability to undergo changes and transform during a chemical change.
decomposition, potential to rust or tarnish, explosive, flammable, reacts with acids, produces light
List 4 clues that a chemical reaction has occurred.
unexpected color change, precipitate, bubbling, smoke, light production, presence of heat without adding thermal energy, change in odor
A glass sweating on a hot day is an example of what type of phase change? Does it release or absorb energy?