Cycles of Matter — Unit test Answers

During the nitrogen cycle, through which structure are nitrogen compounds first absorbed into the plant?

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

After two half-lives, how much of the original material has decayed?

How might an entire insect be preserved?

Which feature causes a gap in the geologic record?

Which is the first step in the process during the formation of molded fossils?

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 describes eras and periods?

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

Which spheres of Earth are directly influenced when human-caused air pollution leads to acid rain that dissolves limestone rocks?

The image shows flat sedimentary rock layers in the foreground and angled sedimentary rock layers in the background.

The image shows cross-cutting relationships. B, W, E, and K represent rock layers, and Q represents a fault.

Study the diagram of the geologic time scale.Which method is most likely used to identify what happened before the start of the Paleozoic era?

Which phrase describes the relative age of a rock?

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

Rosa drew a flow chart of the carbon cycle.

Which information can be determined using half-life?

A tropical rainforest includes trees, animals, insects, plants, rain, rivers, rocks, soil, and warm, moist air.Which spheres of Earth are represented in a tropical rainforest?

The diagram illustrates the water cycle.