Relationships The connection between two organisms.

What do you Know? In your everyday life, you have different relationships. Can you name a type of relationship you have? This is a way to connect to the student’s prior knowledge and give them a way to organize the new information we will be covering.

What do you know? Now think of two animals with a relationship, and let’s list them. Create a column on the whiteboard. Then list the two animals the students provide opposite each other on the board.

Competition Competition is when two organisms compete (or fight) for a resource (like food). Ex: the owl and snake in this web.

Competition Not all resources are food. For example, plants must be planted a certain distance apart or they compete for growing space and soil nutrients.

Symbiosis Symbiosis is a relationship between two organisms and AT LEAST one organism benefits from it.

3 types of symbiosis Mutualism Commensalism Parasitism

Mutualism A symbiotic relationship where both of the organisms benefit. Ex: humans and plants Ex: Nile crocodile and plover

Mutualism The sucker fish removes parasites from the tiger shark.

Commensalism A symbiotic relationship where one organism benefits and the other organism is not hurt or helped. Ex: Hermit crabs and snails

Commensalism The spider needs the plant to hang its web from.

Parasitism A symbiotic relationship where one organism benefits and the other organism is hurt. Ex: Fleas on a dog

Parasitism The dodder vine uses special roots that absorb nutrients from the plant it wraps around.

Your Mission Watch the following movie. 2. Find at least 1 example of each of the vocabulary words we discussed and add it to your notes. Watch “The Magic School Bus: Takes a Dive”

Closure If you were a clown fish in the great wide ocean, what type of relationship do you think would be the most beneficial to you? Why would that relationship be more helpful to you than the other relationships? Written on a slip of scrap paper or on an index card.