Unit Test — Unit test Answers

For which object would a geologist use carbon-14 dating to determine age?

Which correctly lists the three isotopes that geologists measure to determine the age of an organism’s remains?

Some bacteria live in the roots of plants like soybeans and peas.

Which best describes eras and periods?

How might an entire insect be preserved?

Some consumers, like lions, do not eat plants or any other producers. They only eat other animals.How do lions obtain the carbon they need?

Which sphere of Earth includes icebergs?

Which best explains a primary reason for the inability of life to exist in Earth’s early atmosphere?

A volcanic eruption releasing rock, ash, and dust particles into the air is an example of which interaction?

Which example describes biotic factors interacting with the environment?

Which feature causes a gap in the geologic record?

Which event would most likely cause a competition for water?

A river contains several beaver dams that are constructed from tree limbs and mud. If other beavers move to this area to build a dam, what is one need for which they are most likely competing?

Which statement describes a scenario where limited availability of an environmental resource leads to competition among plants?

Which scenario describes an interaction between two different Earth spheres?

Which feature of Earth is part of the geosphere?

Which human activity would most likely decrease the amount of carbon in the atmosphere?

Which processes result in the release of carbon? Select three options.Animals break down food molecules to obtain energy.The remains of producers are broken down by decomposers.The remains of consumers are broken down by soil decomposers.Producers take in carbon dioxide.Producers make sugars and starches.

What is one way to classify mud found in an ecosystem?

water vaporgroundwaterrunoffcondensation