8Th Force And Motion Staar Vocab

Front 1

Acceleration

Back 1

the rate of change in velocity, or the change in velocity per unit of time.

Front 2

Balanced forces

Back 2

forces that produce a net force equal to zero (no movement).

Front 3

Charge

Back 3

an electrical property that can be either positive or negative.

Front 4

Compound machine

Back 4

a machine made up of two or more simple machines.

Front 5

Convection

Back 5

the transfer of heat in fluids by the movement of currents that form in the fluids.

Front 6

Current

Back 6

a flow in a particular direction.

Front 7

Data

Back 7

information gathered in an investigation.

Front 8

Data table

Back 8

a chart that organizes data in rows and columns.

Front 9

Density

Back 9

the ratio of mass to volume of a substance.

Front 10

Direction

Back 10

the path that a moving object follows.

Front 11

Electrical energy

Back 11

the energy of moving electrical charges.

Front 12

Electromagnetic radiation

Back 12

energy that travels through space in the form of waves.

Front 13

Energy

Back 13

the ability to do work

Front 14

Energy transformation

Back 14

a change of energy from one form to another.

Front 15

Force

Back 15

a push or pull.

Front 16

Friction

Back 16

a force that tends to oppose motion between objects that touch each other.

Front 17

Geotropism

Back 17

a plant’s growth response to gravity (plant roots grow downward).

Front 18

Gravity

Back 18

a force that pulls all objects toward one another.

Front 19

Heat

Back 19

the flow of thermal energy.

Front 20

Hydrotropism

Back 20

a plant’s growth response to water.

Front 21

Inclined plane

Back 21

a simple machine consisting of a straight, slanted surface.

Front 22

Inert

Back 22

unable to react chemically.

Front 23

Inertia

Back 23

the tendency of an object to resist a change in its motion.

Front 24

Kinetic energy

Back 24

energy of motion.

Front 25

Law of conservation of energy

Back 25

a scientific law stating that although energy can change from one form to another, energy is neither created nor destroyed.

Front 26

Lever

Back 26

a simple machine made up of a bar that pivots at a fixed point.

Front 27

Mass

Back 27

the amount of matter in an object.

Front 28

Mechanical advantage

Back 28

a calculation of how much a machine multiplies force.

Front 29

Mechanical digestion

Back 29

the breaking of food into smaller pieces without changing it chemically.

Front 30

Mechanical energy

Back 30

the energy of motion used to do work.

Front 31

Mechanical weathering

Back 31

a process that breaks rock into smaller pieces by physical means without changing its chemical composition.

Front 32

Model

Back 32

a representation of an object, system, or process.

Front 33

Motion

Back 33

a change in an object’s position over time.

Front 34

Net force

Back 34

the sum of all the forces acting on an object.

Front 35

Parallax

Back 35

the apparent shift in the position of an object when viewed from two different places.

Front 36

Phototropism

Back 36

a plant’s growth response to light (plant growing towards light).

Front 37

Physical change

Back 37

a change that alters the form or appearance of a substance without changing the identity.

Front 38

Position

Back 38

an object’s location relative to a reference point.

Front 39

Potential energy

Back 39

energy an object has because of its position or composition

Front 40

Pulley

Back 40

a simple machine that consists of a rope or chain wrapped around a wheel.

Front 41

Reference point

Back 41

a stationary object against which motion is measured.

Front 42

Screw

Back 42

a simple machine that consists of an inclined plane wrapped around a cylinder.

Front 43

Simple machine

Back 43

a device that makes work easier by changing the size, direction, or both size and direction of the force used to do the work.

Front 44

Temperature

Back 44

a measure of the average kinetic energy of the particles in a substance.

Front 45

Thermal energy

Back 45

the energy of the moving particles that make up all matter.

Front 46

Thigmotropism

Back 46

a plant’s growth response to touch.

Front 47

Unbalanced forces

Back 47

forces that produce a net force other than zero (movement

Front 48

Velocity

Back 48

speed in a particular direction.

Front 49

Wedge

Back 49

a simple machine that consists of two inclined plans placed back to back.

Front 50

Wheel and axle

Back 50

a simple machine that consists of two circular objects of different sizes.

Front 51

Work

Back 51

the use of a force to move an object over a distance in the direction of the force.