Natural Resources from the Earth - Second Grade Science

Everything you use throughout your day—from the wooden pencil in your hand, the cotton shirt you wear, and the glass of clean water you drink, to the metal school bus that drives you down the street—comes from materials found on our planet. These useful materials that exist in nature and can be used by humans to satisfy our needs are called natural resources. Earth provides an astonishing variety of resources from its land, waters, atmosphere, and living organisms.

What is a Natural Resource?

A natural resource is any material, substance, or organism found in nature that humans use for food, shelter, clothing, tools, heating, transportation, and recreation.

+-----------------------------------------------------------------------+
|                    EARTH'S FOUR REALMS OF RESOURCES                   |
|                                                                       |
|   1. LAND & SOIL   ----> Fertile farmland, rocks, minerals, sand      |
|   2. WATER BODIES  ----> Freshwater for drinking, irrigating, fish    |
|   3. ATMOSPHERE    ----> Breathable oxygen, wind power, solar energy  |
|   4. LIVING BIOSPHERE -> Forests for lumber, plants for food & cotton |
+-----------------------------------------------------------------------+

How Natural Resources Become Everyday Products

Human beings are clever engineers. We extract raw materials from nature and process them into modern conveniences.

+-----------------------------------------------------------------------+
|                    FROM RAW RESOURCE TO FINISHED ITEM                 |
|                                                                       |
|   RAW NATURAL RESOURCE                 FINISHED HUMAN PRODUCT         |
|   Tall Pine & Oak Trees       ====>    Pencils, notebook paper, houses|
|   Crude Petroleum Oil         ====>    Plastic toys, gasoline, tires  |
|   Silica Quartz Beach Sand    ====>    Glass windows, drinking jars   |
|   Bauxite & Iron Rocks        ====>    Aluminum foil, steel bicycles  |
|   Cotton Plant Seed Pods      ====>    Soft denim jeans, T-shirts     |
|   Fluffy Sheep Fleece         ====>    Warm wool winter sweaters      |
+-----------------------------------------------------------------------+

Trees and Plant Resources

Trees supply lumber to frame houses, build wooden furniture, and construct musical violins. Wood fibers are also ground into pulp and bleached to make notebook paper, cardboard boxes, and tissues. Plants like cotton and flax yield fibers woven into clothing, while rubber trees produce sap (latex) used for waterproof boots and bouncy balls.

Rocks, Minerals, and Ores

Mining yields valuable minerals: Iron Ore: Melted and refined into steel for building skyscrapers, bridges, and cars. Copper: Drawn into flexible electrical wires that carry electricity into wall outlets. Sand (Silica): Heated in searing kilns until it melts into transparent liquid, which cools into window glass and eyeglasses. Clay: Molded and fired into brick walls, roofing tiles, and ceramic mugs.

Fossil Fuels: Ancient Energy

Fossil fuels—petroleum oil, coal, and natural gas—formed over hundreds of millions of years from the buried, pressurized remains of ancient swamp plants and prehistoric marine plankton. Petroleum Oil: Refined into fuels (gasoline, diesel, jet fuel) and synthesized into virtually every plastic container, toy, and medical syringe used today. Coal: Burned in power plants to produce electricity. Natural Gas: Piped to stoves for cooking and furnaces for home heating.

The Importance of Natural Resources

Without Earth's natural resources, modern human civilization could not exist: Food and Water: Soil, rain, and livestock provide our daily nutrition. Shelter: Wood, stone, concrete, and metal protect us from wind, rain, and cold. Health and Medicine: Thousands of medicines are derived from rainforest plants, fungal molds (penicillin), and mineral compounds.

Chapter Review Exercises

Question 1: Define what a natural resource is and name three natural resources you use every single day.

Question 2: What raw natural resource is used to manufacture clear glass windows, and how is it transformed?

Question 3: How do petroleum oil deposits formed millions of years ago connect to modern plastic toys in your bedroom?

Question 4: Why are fertile soil and clean freshwater considered among Earth's most critical natural resources?

Solutions and Explanations

Solution 1: A natural resource is any material, substance, or organism found in nature that humans use to meet their needs. Three everyday natural resources are clean freshwater (for drinking and bathing), trees/wood (for paper and pencils), and cotton plants (for clothing).

Solution 2: Clear glass windows are manufactured from silica sand (crushed quartz grains). The sand is heated in high-temperature industrial kilns until it melts into a glowing liquid, which is flattened and cooled into clear sheets of solid glass.

Solution 3: Petroleum oil is a fossil fuel formed from microscopic marine organisms buried under ocean sediments for millions of years. Chemical refineries process petroleum crude oil into synthetic polymers called plastics, which are molded into toys, containers, and electronics.

Solution 4: Fertile soil and clean freshwater are critical because they are directly required for human survival: without fertile soil we cannot grow agricultural crops or raise livestock, and without freshwater humans and all land animals would perish from dehydration.