| fertilizer |
a natural or chemical substance added to soil to make it better for growing plants. |
| flair |
a natural ability; talent. |
| fossil fuel |
any carbon-containing fuel formed from the remains of prehistoric plants and animals. Coal, petroleum, and natural gas are examples of fossil fuels. |
| geography |
the science of the earth's surface and all life on it. When studying geography, one learns about the different countries and people of the earth, its climate, its natural resources, and its oceans, rivers, and mountains. [1/2 definitions] |
| grow |
to become larger by natural development; increase. [1/5 definitions] |
| habitat |
the natural environment of an animal or plant. |
| hike |
to take a long walk in a natural area for fun, exercise, or training. [1/2 definitions] |
| hot spring |
a natural spring that has water warmer than body temperature. |
| inclination |
a natural tendency towards. [1/3 definitions] |
| instinct |
natural behavior in an animal that is not taught by parents or experience but is simply part of what an animal is born with. [2 definitions] |
| irrigate |
to supply with water by artificial means from a natural source of water. |
| juice |
the natural liquid from plants or meats. The liquid from fruits is used for drinking. |
| knack |
a natural talent for something. |
| landform |
a natural part of the earth like a hill, mountain, canyon or island. A landform has been made by forces that are active inside the earth or around the earth. |
| lightning |
natural electricity produced in thunderclouds. Lightning appears as a bright flash or streak of light in the sky. [1/2 definitions] |
| man-made |
made or formed by human beings; not natural. |
| medium |
the natural or social environment in which one lives. [1/6 definitions] |
| methane |
a gas made of carbon and hydrogen atoms that is stored in and collected from the earth. Methane is used for heating and cooking in the form of natural gas. |
| moon |
the earth's natural satellite. It revolves around the earth from west to east in about 28 days. The moon joins the earth in its orbit around the sun. The moon does not give off light. Instead, its shine comes from the light it reflects from the sun. [2 definitions] |
| mouth |
a natural opening into or from a cave or other hole. [1/6 definitions] |
| musk |
an artificial substance that smells like the natural deer substance. This kind of musk is also used in making perfume. [1/2 definitions] |