Kevin Holbrook

What Type of System Is Earth? Open vs. Closed Systems

What Is the Average Temperature of a Grassland?

What Color Is Swamp Water and What Causes It?

How Does Loss of Biodiversity Affect Humans?

How Human Activities Affect Disaster Frequency & Impact

Where Is the Most Fertile Soil in the World?

How Are Groundwater Supplies Initially Impacted During a Drought?

What Makes the Holes in the Sand at the Beach?

How Long to Boil Water to Kill Bacteria?

What Is a Tidepool? The Miniature Ocean Ecosystem

How Many Planets Could Potentially Support Life?

Is Slash and Burn Agriculture Sustainable?

What Makes a Lake a Lake? The Scientific Definition

Why Are Fossils Mostly Found in Sedimentary Rocks?

What Affects Water Quality? Human and Natural Factors

How Would We Survive on Mars? The Key Requirements

What Is in Rainwater and Is It Safe to Drink?

Why are there less organisms as you move up the energy pyramid?

What Would Happen If the Atmosphere Was 100% Oxygen?

What Are Index Fossils and Why Are They Important?