Earth's Spheres
Which sphere includes all living organisms on Earth?
The Biosphere
In a food chain or food web, what do arrows represent?
The movement of energy
Fungi and many bacteria belong to this group that helps recycle nutrients in ecosystems.
A _____ is any collection of interacting parts that work together to make a whole or produce or perform a function.
System
What is the geosphere?
Earth's core, mantle, and crust
Plants, algae, and other organisms that make their own food using sunlight are called this in a food chain.
Producer
When decomposers break down dead organisms, they return these materials to the soil for plants to use again.
Nutrients
When a system is part of a larger system, the system inside a larger system is called a ______.
Subsystem
Lakes, rivers, and streams are examples from which Earth sphere?
The Hydrosphere
If a top predator disappears from a food web, this may happen to the population of the organisms it used to eat.
What is the population increasing?
Dead leaves, animal waste, and other decaying organic material in an ecosystem are called this.
Detritus
In this system, roads, cars, buses, and trains all work together to move people and goods.
Transportation system
This Earth sphere is the layer of gases surrounding Earth.
What is the atmosphere
If a disease greatly reduced the grass in a food web, this would most likely happen to the rabbits.
What is their population decreasing
Earthworms and pill bugs are examples of organisms that eat dead organic material called detritus; these organisms are known as this.
Detritivores
In a system, the different pieces that work together are called these.
parts or components
When rain falls into the ocean, which two spheres are interacting?
The atmosphere and the hydrosphere
What important group is missing from this food chain?
Grass → grasshopper → frog → snake → haw
Decomposers
When food scraps and yard waste break down in a compost pile, they become this nutrient-rich material that can help plants grow.
compost
This system helped Ms.O last summer when she traveled.
A suitcase.