the air that surrounds Earth

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the layer of gases closest to Earth's surface

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the force put on a given area by the weight of the air above it

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the height above Earth's surface

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the amount of water vapor in the air

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an instrument that is used to measure atmospheric pressure

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the transfer of heat through the movement of a gas or liquid

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the usual weather pattern

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the pattern of the flow of water

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changed because of being exposed to the atmospheric conditions

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to dirty or pollute

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when water changes from a liquid to a gas

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to recycle or make usable again

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the process in which matter changes from a solid directly into a gas

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a substance that cannot be simplified any more (a pure substance)

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the smallest particle that has the property of an element (a pure substance)

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the combination of 2 or more substances that DO NOT form a new substance (Ex:chex mix, trail mix)

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the part that gets dissolved (Ex: salt, sugar, powdered koolaid)

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the part that does the dissolving (liquid) (Ex:water)

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a mixture whose particles are the size of atoms or molecules.  Something has been completely dissolved.

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a mixture whose particles settle and separate after a few hours (Ex: Italian salad dressing)

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to predict the weather

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the process of when liquid changes into vapor

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water in the form of gas (steam, fog, etc.)

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the process of when water vapor changes into liquid (clouds forming)

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any rain, snow, or hail that falls

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a man-made lake that stores water for later use

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a structure that carries large amounts of water from one place to another

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the act or policy of saving or protecting something

an object in space that circles around another object

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the force of attraction between two object

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the path an object takes as it travels around another object

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anything that has mass and takes up space

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a measure of how tightly matter is packed in a given amount of space

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a particle in the nucleus of an atom that carries one unit of positive electric charge

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a particle in the nucleus of an atom having no charge

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a particle in the space outside the nucleus of an atom that carries one unit of negative electric charge

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a particle that contains two or more atoms joined together

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a chart that shows all of the known elements and their properties

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made up of things that either look the same or are the same

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made up of things that are different

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the passing of a mixture through a system that can separate small particles from larger particles (straining)

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a change that creates a new kind of product with different properties from the original reactants

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the original substance at the beginning of a chemical reaction

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a new substance resulting from a chemical change

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the measure of how quickly substances change during a chemical reaction

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the solid product of a chemical reaction between two liquids

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the degree to which heat or electricity flows through a substance

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something that resists the flow of energy like heat or electricity

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capable of being rolled or pounded into flat sheets

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the gradual weakening and wearing away of something, usually due to a chemical reaction

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capable of being drawn out into a thin wire or thread

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the system of objects or, or around the Sun

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the smashing together of particles to create new particles

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an object that crosses paths with Earth and enters Earth's atmosphere

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a mixture of frozen gases, ice, dust, and rock that moves in an irregular circle around the sun

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a rock that goes around the sun

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an object that circles around its planet

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a tool used to see distant or faraway objects

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an object in space that makes its own light and heat

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the rise and fall of the ocean's surface

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the tendency of a moving object to continue moving in a straight line

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a curved path

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a measure of how strongly gravity pulls on an object

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the smallest unit of living matter that can carry out the basic processes of life

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green sructures inside plant cells that turn sunlight into food

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an individual living thing that carries out five basic life functions

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a group of similar cells that work tegether to do the same job

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a group of tissues that work tegether to perform a specific bodily function

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containing vessels that transport water and food

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containing no plant tissue through which food or water moves

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plant tissue that moves water and minerals up from the roots

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the tissue in a plant that moves food down from the leaves to other parts of the plant

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the structure that controls all activity within a cell

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structures within a cell that break down food and turn it into energy

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an animal that has a backbone

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the organ system that brings oxygen to the lungs and then to the body cells and gets rid of carbon dioxide

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the organ system that uses the heart, blood, and blood vessels to move materials to and from the cells

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the organ system that uses the skin, lungs, and kidneys to move wastes from the body

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the organ system that uses the mouth, stomach, and small intestines to turn food into nutrients that the cells of the body can use

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a watery fluid that softens and moistens food

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the long muscular tube that brings food into the stomach

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a muscular organ that changes food into a thick soupy liquid

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the organ that completes digestion and allows digested food to enter the blood

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the thick tube-like organ that removes undigested waste

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a large, flat muscle that pulls air in and pushes air out of the lungs

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one of two organs that fills with air when you inhale

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a tiny blood vessel

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air sacs in the lungs where gases move into and out of the blood

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the blood cell that carries oxygen and carbon dioxide in the blood

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a blood vessel that carries blood back to the heart

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a thick-walled blood vessel that carries blood away from the heart

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