Balance and Motion

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# Balance and Motion - PowerPoint PPT Presentation

Balance and Motion. Investigation 1: Balance. arch. A curved shape. balance. To stay in a position without being held. balance point. The place on which an object balances. clothespin. A clip of wood or plastic for fastening clothes on a clothesline. counterweight.

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## PowerPoint Slideshow about 'Balance and Motion' - cain-allen

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Presentation Transcript

A curved shape.

### balance

To stay in a position without being held.

### balance point

The place on which an object balances.

### clothespin

A clip of wood or plastic for fastening clothes on a clothesline.

### counterweight

Something that helps to balance an object.

### crayfish

A freshwater shellfish.

### mobile

A system of balance beams and objects.

### object

Anything that can be seen or touched; a thing.

### position

The place where a person or thing is.

### system

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.

### triangle

A three-sided shape.

### unstable

When something is not steady and falls over.

### weight

How heavy something is.

### wire

A bendable metallic strand or rod.

### air resistance

The force of air pushing on something.

### axis

A straight line around which something rotates.

### disk

An object that is a circle in only one direction and can fall over; a disk can be a wheel.

### knot

To firmly tie two pieces of material together.

### motion

The act of moving.

When something moves.

### rotate

To turn in circles a lot of times; to spin.

### shaft

Something that acts as an axis.

### spin

To turn by turning around an axis.

To turn in circles a lot of times; to rotate.

### swirl

To spin or twist around and around.

### top

A toy that spins.

### twirl

To spin in the air.

### twirler

A flying spinner.

### twist

To wind or turn something around.

### whirl

To move or turn around quickly or suddenly.

### wing

The moveable appendages that birds and other animals use to fly.

### zoomer

A toy made from a plastic disk and a piece of string; it spins around when tension is released from the twisted string.

### axle

A rod or shaft to which wheels can be attached.

### loop

An opening that is made by curving a piece of material into a circle.

### ramp

An object that has a slope.

### runway

A path over which something moves or lands.

### slope

A surface that is higher on one end.

### sphere

An object that is round in all directions and rolls in all directions.

### spiral

To move in a circular motion around a fixed center point.

### wheel

An object that is a circle in only one direction and can fall over; a wheel is a disk.

### force

A push or a pull.

### gravity

A force that pulls things toward the Earth.

### pitch

How high or low a sound is.

### roll

To move by turning over and over.

When a wheel goes around on its edge.