Ava Sawyer – författare
Visar alla böcker från författaren Ava Sawyer. Handla med fri frakt och snabb leverans.
8 produkter
Human Environmental Impact
How We Affect Earth
Av Ava Sawyer
E-bok, 2017
90 kr
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Pollution and mining for resources have negatively impacted Earth. Non-renewable resources will one day run out. Then what? In this title readers will learn about alternative energy sources such as solar, wind and geothermal energy, and what they can do to positively affect Earth.
Humans and Other Life on Earth
Sharing the Planet
Av Ava Sawyer
E-bok, 2017
90 kr
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Humans have influenced the world around them since they first walked on Earth. Hunting has impacted animal populations. Pollution and deforestation have affected habitats. Humans have also worked to protect the environment through reserves and breeding programmes. In this title readers will learn …
Humans and the Hydrosphere
Protecting Earth''s Water Sources
Av Ava Sawyer
E-bok, 2017
90 kr
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The hydrosphere encompasses all water on Earth from glaciers and ice to rivers and oceans. People use water every day. This title asks the question, how much do you use? Readers will learn how humans use water, how humans positively and negatively affect water and how to protect the water supply.
Humans and Earth's Atmosphere
What''s in the Air?
Av Ava Sawyer
E-bok, 2017
92 kr
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Nitrogen, oxygen, argon and carbon dioxide are all gases in Earth''s atmosphere. But what happens when there is too much or two little of a certain gas? Readers will learn how everyday activities such as driving, heating buildings and using aerosols release harmful gases into the air and how it …
Fossils
Av Ava Sawyer
E-bok, 2019
111 kr
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How do we know about the plants and animals that lived millions of years ago? Fossils! Every continent contains fossils that tell us about organisms that once existed on Earth. Fossils also give us details about what the planet was like in these prehistoric times. Find out how fossils are formed, …
Igneous Rocks
Av Ava Sawyer
E-bok, 2019
111 kr
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Did you know igneous rock is formed as a result of volcanic activity? This type of rock is made up of minerals. Find out more about minerals, where igneous rocks form and what purposes they serve. You may even have igneous rocks in your own home!
Metamorphic Rocks
Av Ava Sawyer
E-bok, 2019
107 kr
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Did you know rocks could go through metamorphosis? Intense heat or pressure changes the form of metamorphic rocks. This type of rock is the oldest found on Earth. Find out where metamorphic rocks are formed, how they''ve impacted the planet''s landscape and more.
Sedimentary Rocks
Av Ava Sawyer
E-bok, 2019
108 kr
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Sedimentary rocks are all around you. They form from soil, gravel, dust and other sediment. This type of rock is often affected by wind and water erosion. Learn how this can change an area''s landscape and how sedimentary rocks are useful.
