Ecology Final Review
Quiz 1
Tuesday, September 20, 2011
10:59 PM 1. Ecology o The study of interactions of organisms with their environment
2. Ecosystems o Organisms and their interactions with one another as well as their interactions with the environment o Ecosystems are like puzzles; if you disturb one part, you disturb others o Energy maintains an ecosystem
3. Environment o 2 parts • Biotic Part ▪ Living organisms • Abiotic Part ▪ Non living things such as soil, H2O, nutrients, sunlight
4. Energy o Ability to do work o Comes from food molecules (forces that hold molecules together) o If you break molecules apart, you release energy o Plants can make their own food however animals cannot o Both plans and animals can break food down to get energy
5. Matter o Anything that takes up space • Composed of an element
6. Element o Cannot be broken down any further by ordinary chemical means o Composed of atoms o Atoms • Composed of 3 basic particles ▪ A proton which has a positive charge and a weight of 1 ▪ A neutron which has no charge and a weight of 1 ▪ An electron which has a negative charge and a weight of 0 o Different elements have different number of protons • Number of protons in an element is the atomic number o The weight or mass of an element is equal to the number of protons and number of neutrons o In an element, the # of protons is always the same • The number of neutrons can vary • The number of electrons is usually equal to the number of protons o Electrons circle nucleus in distinct orbit • Referred to as shells • First shell holds 2 and all after hold 8 • Inner most shells fill first • Any element with outermost shell not filled to the max is reactive
Tuesday, September 20, 2011
10:59 PM 1. Ecology o The study of interactions of organisms with their environment
2. Ecosystems o Organisms and their interactions with one another as well as their interactions with the environment o Ecosystems are like puzzles; if you disturb one part, you disturb others o Energy maintains an ecosystem
3. Environment o 2 parts • Biotic Part ▪ Living organisms • Abiotic Part ▪ Non living things such as soil, H2O, nutrients, sunlight
4. Energy o Ability to do work o Comes from food molecules (forces that hold molecules together) o If you break molecules apart, you release energy o Plants can make their own food however animals cannot o Both plans and animals can break food down to get energy
5. Matter o Anything that takes up space • Composed of an element
6. Element o Cannot be broken down any further by ordinary chemical means o Composed of atoms o Atoms • Composed of 3 basic particles ▪ A proton which has a positive charge and a weight of 1 ▪ A neutron which has no charge and a weight of 1 ▪ An electron which has a negative charge and a weight of 0 o Different elements have different number of protons • Number of protons in an element is the atomic number o The weight or mass of an element is equal to the number of protons and number of neutrons o In an element, the # of protons is always the same • The number of neutrons can vary • The number of electrons is usually equal to the number of protons o Electrons circle nucleus in distinct orbit • Referred to as shells • First shell holds 2 and all after hold 8 • Inner most shells fill first • Any element with outermost shell not filled to the max is reactive