Focus Questions
Investigation 1
How can you identify a system?
Is planet Earth a system?
What organisms are both predators and prey in the kelp forest ecosystem?
What happens when compost worms interact with organic litter?

Investigation 2
What does yeast need to break its dormancy?
How do plants get the food they need?
How do animals get the nutrients they need?

Investigation 3
How are nutrients transported to cells in a plant?
How do humans transport nutrients to all their cells?
Why do people breathe?

Investigation 4
In dodgeball, how are you able to avoid being hit?
What features of organisms attract attention?
What behaviors are instinctive, and what behaviors are learned?
What are the parts of a marine ecosystem?