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| a distance from far away; not close by |
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| a straight line around which something turns |
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| a rod or shaft to which wheels can be attached |
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| to be in a stable position |
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| point the place on which an object balances |
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| a magnetic needle in a case. Compass needles on Earth point north. |
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| to place weights on an object to keep it in a stable position |
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| weight added to a system to make it balance |
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| an object that is a circle in only one direction and can fall over; a disk can be a wheel |
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| a force that opposes motion |
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| a force that pulls things toward Earth |
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| an African thumb piano with steel springs that vibrate at various rates |
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| to firmly tie two pieces of material together |
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| an opening that is made by curving a piece of material into a circle |
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| something that helps people do work. A machine can make heavy things move by using a push or a pull. |
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| an object that sticks to iron and steel. Magnets can push or pull other magnets or objects made of iron or steel. |
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| a force that can work on another object without touching it |
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| a system of balanced beams and objects |
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| how high or low a sound is |
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| something you can observe about an object or a material. Volume is an example of a property of sound. |
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| when you make things move toward you. Pulling is a force. |
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| when you make things move away from you. Pushing is a force. |
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| an object that has a slope |
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| to move by turning over and over from one place to another |
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| to turn in circles a lot of times; to spin |
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| a path over which something moves or lands |
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| something that acts as an axis |
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| a surface that is higher on one end |
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| an object that is round in all directions and rolls in all directions |
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| to move by turning around an axis |
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| position steady, not falling over |
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| a set of objects that are related in some way and can be isolated for study; a group of things or parts that form a whole |
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| something that helps people do work. A tool can make things move by using a push or a pull. |
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| when something is not steady and falls over |
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| a back-and-forth motion. Vibration makes sound. |
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| how soft or loud a sound is |
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| an object that is a circle in only one direction and can fall over; a wheel is a disk |
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| to move or turn around quickly or suddenly |
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| the moveable appendages that birds and other animals use to fly |
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| tasks to be accomplished. People use tools and machines to make work easier. |
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| a musical instrument made from a set of bars or tubes of various lengths that make sounds with different pitches |
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Definition
| a toy made from a plastic disk and a piece of string; it spins around when tension is released from the twisted string |
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