science 2nd periodic test

• Ecology is the study of organisms and how they interact with the environment around them
• Ecosystem is a geographic area where plants animals and other organisms work together to form life
• Interaction is a kind of action that occurs as two or more objects have an affet upon one another
• Autotrophs a group of organisms that can use energy in sunlight to convert water and carbon dioxide into glucose
• Hetotrophs organisms that do not make their own food
• intertidal zone areas between the high and low tides
• Subtidal zone region from the end of the continental shelf to the low tide marker never exposed to air
• Spray highest reach of spray and storm waves to high tide
• Upper from upper region of high tides to sea level
• Middle is covered and uncovered 2 times per day
• Lower is usually submerged except for a few hours each month
• Waves refer to the movement of water
• Salinity refer to the amount of salt in water
• Temperature refer to the level of hotness or coldness of water.
• Biodiversity refer to the abundance of different living organism living in an area.
• Estuaries are enclosed areas where freshwater and saltwater meet and mix.
• salinity 0%-35%
• food chain is a model that shows a sequence of feeding relationships.
• Herbivore an organism that only eats plants
• carnivore an organism that only eats meat
• omnivore an organism that eats meat and plants
• Decomposers break down dead plants and animals
• Food web organisms eat more that just one organism
• Energy pyramid shows the amount of energy that moves from one trophic level to another in a food chain
• Motion the action or process of moving or being moved
• A reference point is a place or object used for comparison to determine of something is in motion.
• Distance it is how far an object is from one position to another
• Time measurable period
• Speed is the distance an object moves in a certain time
• speed describes how fast or slow an object is moving.