Brief Earth History Review

The major source of oxygen in Earth’s Early Proterozoic atmosphere is inferred to have been produced by

• oceanic cyanobacteria
• outgassing from volcanic eruptions
• radioactive decay in Earth’s inner core
• evaporation of ocean water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Scientists infer that oxygen in Earth’s atmosphere did not exist in large quantities until after

• The first multicellular, soft-bodied marine organisms appeared on Earth
• The initial opening of the Atlantic Ocean
• The first sexually reproducing organisms appeared on Earth
• Photosynthetic cyanobacteria evolved in Earth’s oceans

Tags

NGSS.MS-LS1-6

The longest span of geological time is an

• Era

• Period

• Eon

• Epoch

Tags

NGSS.MS-ESS1-4

The theory that explains the formation of the solar system is called ____.

• Nebulis Theory
• Nebular Theory
• Big Bang Theory
• Big Nebulan Theory

Nebulae are primarily composed of what element?

• Hydrogen
• Helium
• Other hard elements
• Zinc

Tags

NGSS.MS-PS1-1

How much of the nebula matter became the Sun?

• 33%
• 66%
• 99%
• 77%

A cloud of gas and dust from which bodies in space are formed

• photosphere
• nebula
• solar flare
• Sunspot

What is a small body from which a planet originated in the early stages of development of the solar system called?

• inertia
• planetesimal
• terrestrial planet
• gas giant

The most dense layer of the earth is found:

• in the center of the earth

• in the outer layer of the earth

• on the surface of the earth

• the rock layer under the ocean floor

According to planetary differentiation, earth's layer are sorted by:

• mass

• volume

• age

• density