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1
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The underground part of a plant that anchors the plant and absorbs water
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2
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The place where two air masses meet
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4
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The process of breaking down food
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5
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Plant eater
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8
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No longer living as a species
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9
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Meat eater
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10
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The loudness or softness of a sound
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12
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A push or a pull
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13
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The force that pulls objects toward Earth
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16
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A group of stars that form a fixed pattern
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19
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The imaginary line on which an object rotates
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20
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The invisible, odorless and tasteless mixture of gases that surrounds Earth
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21
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The smallest particle of an element
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24
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An imaginary line halfway between the North and South Poles
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25
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The innermost layer of the Earth
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27
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A tree or shrub that bears its seeds in cones
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30
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The hard tissue that forms the skeleton
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31
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A negatively chared particle in an atom
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32
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The change of state from a solid to a liquid
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35
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A violent, funnel-shaped storm of spinning wind
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36
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Plant and meat eater
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38
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The part of a plant that supports the leaves and flowers
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41
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Fish use these to breathe
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42
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A state of matter that has no definite shape or volume
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46
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The basic unit that makes up all living things
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47
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The dirtying of the environment with waste materials or other unwanted substances
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