Chapter 2 Flashcards
What is matter ?
Anything that occupies space and has mass.
What is are the three parts of an atom?
Protons, neutrons, electrons
What is in the nucleus of an atom?
neutrons, protons, electrons
What is a molecule?
A group of atoms bonded together.
What is an atom?
The smallest unit of an element.
What is a chemical change?
Occurs when substance combines with another to form a new substance.
What is a physical change?
The process of altering the state of something, its appearance.
What is energy?
The ability to do work.
What is kinetic energy?
Energy an object has because of its motion.
What is potential energy?
Energy possessed by an object because of its position.
What is endothermic?
require or absorb heat
What is exothermic?
Give off heat
What are enzymes?
Organic catalysts
solute and solvent
solute (dissolved)
solvent (dissolver)
4 Organic compounds
- Carbohydrates
- Lipids
- Proteins
- Nucleic acid
What is Diffusion?
the net movement of molecules from an area of higher concentration of a substance
What is osmosis?
Diffusion of water molecules through a semipermeable membrane
The basic building blocks of a protein are ?
amino acids
What is polypeptide
chain of amino acids.
1st law of thermodynamics
Energy is neither created nor destroyed
2nd las of thermodynamics
Whenever energy is used some of it is wasted
DNA
Deoxyribonuclic acids
RNA
Ribose nucleic acids
