Study Notes: Tides, Waves, Water, Intertidal Zone, and Ecosystems

Tides: types and movement

  • 3 things affect the tides:
    • The gravitational pull of the Moon
    • The gravitational pull of the Sun
    • The Earth's rotation
  • The 3 types of tides:
    • Diurnal tides: feature one high and one low tide per day.
    • Semidiurnal tides: have two high and two low tides per day that are roughly equal in height.
    • Mixed tides: also have two high and two tides daily, but these highs and lows are of significantly different heights.
  • Describe how the tide moves from high tide to low tide (use new vocabulary):
    • From high tide, the water level decreases as it begins to ebb — the falling tide and the horizontal movement of water away from the shore.
  • Summary of the tidal cycle (key terms):
    • Flood tide: incoming water toward the shore (implied by contrast with ebb).
    • Ebb tide: the falling tide described above.

Ocean Waves: formation and parts

  • The type of wave that forms ocean waves: surface waves, created when friction transfers wind energy to the water, causing water molecules to move in a circular path and creating visible crests and troughs.
  • Parts of a wave (labels that are often shown on an image):
    • 1 — Wave crest
    • 2 — Wavelength
    • 3 — Amplitude
    • 4 — Height
    • 5 — Trough

Properties of Water

  • Water’s key properties include:
    • Cohesion and adhesion, which create high surface tension and enable capillary action.
    • Heat capacity (high ability to store heat).
    • High heat of vaporization (requires a lot of energy to vaporize).
    • Its polarity makes it an exceptional solvent for polar and ionic substances (universal solvent).
    • The density anomaly: it is less dense as a solid (ice) than as a liquid, which causes ice to float on liquid water.

Mixtures: homogeneous vs heterogeneous

  • Examples of homogeneous mixtures:
    • Saltwater
    • Air
    • Steel
  • Examples of heterogeneous mixtures:
    • Oil and Water
    • Milk (as a heterogeneous mixture)

Intertidal Zone: Hazards and Factors

  • Hazards describe the intertidal zone:
    • Changing moisture levels
    • Strong waves
    • Temperature shifts
    • Human impact: people and pollution threaten intertidal zones
  • Biotic and Abiotic factors in the intertidal zone:
    • Biotic factors: organisms such as algae, kelp, mollusks, crustaceans, and fish; interactions include predation and competition
    • Abiotic factors: tides, wave action, salinity, temperature, sunlight, oxygen levels, and physical features like rock type

Intertidal Zone: Autotrophs and Heterotrophs

  • Autotrophs found in the intertidal zone:
    • Sea grasses
    • Algae (brown algae, sea lettuce, red algae)
    • Phytoplankton
  • Heterotrophs found in the intertidal zone:
    • Filter feeders
    • Mussels
    • Barnacles
    • Sea urchins
    • Starfish
    • Sea anemones

Types of Heterotrophs and Their Diets

  • Heterotrophs by diet:
    • Herbivores — plant-eaters
    • Carnivores — meat-eaters
    • Omnivores — both plants and animals

Ecological Relationships (Symbiosis, Predation, Competition, Decomposition)

  • Predation: one organism kills and eats another
  • Mutualism: both species benefit
  • Commensalism: one benefits, the other is unaffected
  • Parasitism: one benefits at the expense of the other
  • Competition: species vie for limited resources like food or space
  • Detritivores and decomposers: consume dead and decaying organic matter

Food Chain Roles

  • Primary consumer: Zooplankton (they eat phytoplankton)
  • Tertiary consumer: Predator (e.g., shark)
  • Herbivore in the food chain: Zooplankton (they feed on phytoplankton, which are producers)

Ecosystem Relationships (Summary of interactions)

  • The ecosystem can host multiple interaction types including mutualism, commensalism, parasitism, predation, competition, and decomposition by detritivores/decomposers.

Taxonomy: Eight Levels and Mnemonic

  • There are 8 levels of taxonomy, from most broad to most specific:
    • Domain
    • Kingdom
    • Phylum
    • Class
    • Order
    • Family
    • Genus
    • Species
  • Mnemonic to remember the order (from most broad to most specific):
    • "king Philip came over for ginger snaps" stands for Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
  • Note: In the transcript, the mnemonic is provided as "king Philip came over for ginger snaps" to recall the order of taxonomic ranks.

Additional: Unit 2 Summative Assessment Reference

  • The transcript includes the line: "Unit 2 Summative Assessment Study Guide 1" which appears as a heading/section context within the content.