A gardener grows a large pumpkin in a pot with a measured amount of soil. After harvest, the soil in the pot weighs about the same as before planting. What does this best show?

Which two things do plants get from their surroundings that account for most of the material in their growth?

Plants use sunlight to combine carbon dioxide from the air with water taken up from the soil, producing their own food and releasing oxygen. What is this process called?

A student claims, 'Plants build most of their body mass from the soil they are planted in.' Which evidence would best argue against this claim?

In a garden, a rabbit eats lettuce leaves, and a fox eats the rabbit. Where did the matter in the fox's body ultimately come from?

A food chain shows grass, then a grasshopper, then a frog, then a snake. Which organism in this chain is the producer?

In an ecosystem, a hawk, an owl, and a snake all eat mice. What does this example best show?

Which statement correctly compares a decomposer with a producer?

A dead log lying in a forest slowly breaks apart over several years, covered with fungi and bacteria. What role are the fungi and bacteria playing?

When decomposers break down a fallen leaf, what happens to the matter that made up the leaf?

As animals live in an ecosystem, they take in gases and water from their surroundings and release waste matter back into the environment. What does this describe?

A model of an ecosystem shows arrows moving matter from dead plants and animals, through decomposers, and back into the soil. What does this model represent?

A vulture feeds on the carcass of a deer that has already died, eating the remaining meat. What role is the vulture playing in this ecosystem?

If all decomposers were suddenly removed from a forest ecosystem, what would most likely happen to dead leaves and animal remains?

In a food chain, an oak tree produces acorns, a squirrel eats the acorns, and a hawk eats the squirrel. Which organism is the producer in this chain?

Which term describes an organism that eats other organisms, whether plants or animals, for food?

A community garden compost bin turns kitchen scraps and dead plant matter into dark, crumbly soil-like material over time. What process is mainly responsible for this change?

When a log burns completely in a campfire, only a small pile of ash is left. What happened to most of the log's matter?

A pea plant is grown in a jar with only water and a support for its roots, no soil. The plant still grows taller and gains mass. What does this best support?

Which statement correctly traces where a deer's body matter ultimately comes from?