EARTH SCIENCE 1086 EXAM 3| 2025-2026 LATEST UPDATED|190 REAL
EXAM | COMPLETE QUESTIONS AND ANSWERS | 100% RATED
CORRECT | 100% VERFIED | ALREADY GRADED A+
A first rapid increase of oxygen in the atmosphere (the First Great Oxidation
Event) occurred about ____ years ago. - (answer)2.4 billion
A second rapid increase of oxygen in the atmosphere (the Second Great Oxidation
Event) started about ____ years ago. - (answer)600 million
A/An ____ is used to measure air pressure. - (answer)barometer
Acidic precipitation is produced: - (answer)when sulfur dioxide and oxides of
nitrogen dissolve in water droplets in the atmosphere.
As early multicellular organisms evolved, they released more __ into the
atmosphere. - (answer)oxygen
At the time of the First Great Oxidation Event, the oxygen concentration in Earth's
atmosphere increased: - (answer)From trace amounts to appreciable quantities
,Atmospheric pressure is measured in ____. - (answer)Bar
Chlorofluorocarbons: - (answer)React to destroy ozone
During photosynthesis, plants convert ___ and ___ to organic sugars and oxygen. -
(answer)carbon dioxide, water
During photosynthesis: - (answer)chlorophyll-bearing plants convert carbon
dioxide and water to organic sugars and release oxygen.
If pure coal burned completely, it would produce: - (answer)Carbon dioxide and
water
In the ___, temperature increases with altitude, because ozone absorbs ultraviolet
radiation. - (answer)stratosphere
Smog is produced: - (answer)When sunlight reacts with automobile exhaust.
, Solar energy breaks oxygen molecules apart in the stratosphere, releasing ____,
which combine(s) with additional oxygen molecules to form ____. -
(answer)oxygen atoms, ozone
The Earth's atmosphere 4.6 billion years ago was mainly composed of ____ and
____. - (answer)hydrogen, helium
The Earths modern atmosphere: - (answer)is composed of 78% nitrogen.
The Earth's primordial atmosphere: - (answer)contained no oxygen.
The atmosphere: - (answer)becomes less dense with increasing altitude.
The highest portion of the atmosphere that absorbs high-energy radiation is the: -
(answer)thermosphere
The largest source of air pollutants in the United States is/are ____. -
(answer)transportation
The layer of air closest to the Earth is the ____. - (answer)troposphere
EXAM | COMPLETE QUESTIONS AND ANSWERS | 100% RATED
CORRECT | 100% VERFIED | ALREADY GRADED A+
A first rapid increase of oxygen in the atmosphere (the First Great Oxidation
Event) occurred about ____ years ago. - (answer)2.4 billion
A second rapid increase of oxygen in the atmosphere (the Second Great Oxidation
Event) started about ____ years ago. - (answer)600 million
A/An ____ is used to measure air pressure. - (answer)barometer
Acidic precipitation is produced: - (answer)when sulfur dioxide and oxides of
nitrogen dissolve in water droplets in the atmosphere.
As early multicellular organisms evolved, they released more __ into the
atmosphere. - (answer)oxygen
At the time of the First Great Oxidation Event, the oxygen concentration in Earth's
atmosphere increased: - (answer)From trace amounts to appreciable quantities
,Atmospheric pressure is measured in ____. - (answer)Bar
Chlorofluorocarbons: - (answer)React to destroy ozone
During photosynthesis, plants convert ___ and ___ to organic sugars and oxygen. -
(answer)carbon dioxide, water
During photosynthesis: - (answer)chlorophyll-bearing plants convert carbon
dioxide and water to organic sugars and release oxygen.
If pure coal burned completely, it would produce: - (answer)Carbon dioxide and
water
In the ___, temperature increases with altitude, because ozone absorbs ultraviolet
radiation. - (answer)stratosphere
Smog is produced: - (answer)When sunlight reacts with automobile exhaust.
, Solar energy breaks oxygen molecules apart in the stratosphere, releasing ____,
which combine(s) with additional oxygen molecules to form ____. -
(answer)oxygen atoms, ozone
The Earth's atmosphere 4.6 billion years ago was mainly composed of ____ and
____. - (answer)hydrogen, helium
The Earths modern atmosphere: - (answer)is composed of 78% nitrogen.
The Earth's primordial atmosphere: - (answer)contained no oxygen.
The atmosphere: - (answer)becomes less dense with increasing altitude.
The highest portion of the atmosphere that absorbs high-energy radiation is the: -
(answer)thermosphere
The largest source of air pollutants in the United States is/are ____. -
(answer)transportation
The layer of air closest to the Earth is the ____. - (answer)troposphere
