Animals: Creatures That Roam the Planet (Natural Resources) by Julie Kerr Casper PhD

Science Studies

By Julie Kerr Casper PhD

Through the process thousands of years, animals have tailored to varied environments on the earth. even though animals have developed over geologic time to Earth's regularly altering environments, and even if the extinctions of convinced species are common, in no different time within the planet's historical past has the extinction cost climbed as excessive because it is at the present time. reasons of this exceptional extinction price comprise destruction of flora and fauna habitat, toxins, overfishing, and poaching. "Animals" illustrates those pressing matters in a way available to center and highschool readers.

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Extra info for Animals: Creatures That Roam the Planet (Natural Resources)

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The Water Cycle Water is necessary for animal survival, plant growth, for dissolving and transporting plant nutrients, and for the survival of soil organisms. The water cycle is fundamental to all living things on Earth. From a ­ fast-­moving stream to rainfall to movement of water through the ground, water is always in motion. The endless movement and recycling of water between the atmosphere, the land’s surface, and underground is called the water cycle, or the hydrologic cycle. Two separate forces make the water cycle work: The energy of the sun and the force of the Earth’s gravity.

Two separate forces make the water cycle work: The energy of the sun and the force of the Earth’s gravity. Water vapor is carried through the atmosphere by air currents. When the air cools, it condenses, 51 52 animals forming clouds. Some of the moisture falls back to Earth as rain, snow, hail, or sleet. Once the water reaches the ground, it can go in several directions before it returns again to the atmosphere. Animals and plants can use the water. It can also be stored in lakes, or it can seep into the soil.

Scientists study fossils, along with biostratigraphy (layers of rock of different ages with fossils embedded in them), to reconstruct these past environments. It is through this type of knowledge that scientists can locate deposits of oil and gas—oil and gas formed from dinosaur remains and the paleoenvironment during that geologic time period. By studying the fossils (for presence of dinosaurs) and stratigraphy (the rock formations that could hold oil and gas), geologists are able to explore for this important energy resource.

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