GTS and Earths History

Open Ended

Why is it significant to understand how and when different life forms emerged on Earth?

Multiple Choice

Which of the following organisms is NOT mentioned as one of the first multicellular invertebrates to appear on Earth?

• Corals

• Jellyfish

• Sea sponges

• Fish

Open Ended

Explain how the emergence of vertebrates and land plants contributed to the diversity of life on Earth.

Multiple Choice

Which of the following groups appeared on Earth around 360 million years ago?

• Ferns

• Amphibians

• Insects

• All of the above

Multiple Choice

When did the earliest dinosaur first appear?

• Triassic Period

• Last year

• Cambrian Period

• Paleozoic Era

Fill in the Blanks

Conifers are also known as

-producing plants.

Multiple Select

Select all the organisms that first appeared between 160 and 130 million years ago.

• Mammals

• Birds

• Flowering plants

• Primates

Multiple Choice

What is the purpose of the geologic time scale in studying Earth's history?

• To measure Earth's temperature

• To describe Earth's history and major events

• To predict future geological events

• To classify types of rocks

Fill in the Blanks

Scientists believe that no multicellular life existed on Earth during the

supereon.

Multiple Choice

Which of the following is a correct subdivision of the geologic time scale according to the Phanerozoic Eon?

• Era, Period, Epoch

• Period, Era, Epoch

• Epoch, Era, Period

• Era, Epoch, Period

Fill in the Blanks

Scientists determine the number and length of time periods based on important events in Earth's history. The early eons are defined by the development of physical features of Earth - it's land, air and

.