Front

What is the absolute age of a rock?

Back

The absolute age of a rock is the approximate numerical age of when the rock or fossil formed.

Front

How can the absolute age of an igneous rock be determined?

Back

By comparing the amounts of decayed and undecayed radioactive isotopes in the rock.

Front

What is natural selection?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

What happens to a population of goats that can eat poison ivy over time?

Back

The herd will tend to become more likely to eat poison ivy.

Front

Which fossil is considered the oldest: Trilobite, Ammonite, Crinoid, or Gastropod?

Back

Trilobite.

Front

What is carrying capacity in an ecosystem?

Back

Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely.

Front

What is the primary producer in an energy pyramid?

Back

The primary producer is the first trophic level, typically plants or algae, which convert solar energy into chemical energy.

Front

What is the energy level at the bottom of an energy pyramid?

Back

1000 kg.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a once-living organism.

Front

What is the significance of radioactive isotopes in dating rocks?

Back

Radioactive isotopes decay at a constant rate, allowing scientists to determine the age of rocks and fossils.