53 terms

Integrated Science Tri. 1

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Scientific Method
State a Problem, Gather Information, Form Hypothesis, Test Hypothesis, Analyze Data, Conclusion
Constant
Factor that does not change when other variables change
Control
Group that does not receive a change, compare results
Independent Variable
What you control or change
Dependent Variable
Changes according to the changes of the independent variable, what was measured
Bias
Occurs when what the scientist expects changes how the results are viewed
Scientific Theory
An explanation of things or events based on knowledge gained from many observations and investigations
Scientific Law
A statement about what happens in nature and that seems to be true all the time
Derived Unit
Unit contained by combining or manipulating different SI units
Law of Conservation of Energy
Energy cannot be created or destroyed, it can be transformed from one form to another, but the total amount of energy never changes
Mechanical Energy
Total amount of potential and kinetic energy in a system
Law of Conservation of Momentum
In the absence of an external force, the momentum of a system remains unchanged
Weight
force of gravity
Density
The amount of matter in a certain space-g/mL or g/cm3
Speed
How fast an object moves over a specific period of time-m/s
Velocity
How far something goes in a specific direction over a specific period of time
Acceleration
An objects change in velocity or speed over a specific amount of time
Momentum
Mass in motion, product of mass and velocity
Force
Push or pull on an object, both are equal in regards to calculations
Work
Product of the force on a n object and the distance through which the object is moved
Power
Rate at which work is done
Potential Energy
Stored energy, energy of position
Kinetic Energy
Energy in motion
Mass
The amount of matter in an object-g
Temperature
How hot or cold and object is-K
Time
How long it takes for an event to take place-s
Volume
The amount of space an object takes up- L, cm3 (1cc=1cm3=1mL)
Length
The distance between objects-m
Line Graph
Can show any relationship where the dependent variable changes due to a change in the independent variable
Bar Graph
Useful for comparing and contrasting information collected by counting
Circle Graph
Used to show how some fixed quantity is broken down into parts
Motion
The act or process of moving
4 types of motion
Constant, Acceleration, Decelerating, Stopped
Motion Diagram
Diagram using dots to show how the object is moving
Stopped Motion
Object is not moving
Constant Motion
Object is moving at a steady rate, not speeding up or slowing down
Accelerating Motion
Object is speeding up at a constant rate
Decelerating Motion
Object is slowing down at a constant rate
Free Fall
Acceleration due to gravity (g) for objects in free fall at the earths surface is 9.8 m/s2
Net Force
All of he forces on an object
Equilibrium
When the net force equals to zero
5 types of forces
Force of push or pull, force of normal, force of friction, force of gravity, force of tension,
Force of Push or Pull
When person pushes or pulls an object, not always present
Force of Normal
Force that prevents one object from moving through another object
Force of Friction
A contact force, poses motion
Force of Gravity
Known as the weight, pulls down to center of the earth
Force of Tension
When there is a rope, cable, string; pulls parallel along length of rope
Vectors
Arrows that show both a magnitud and direction of a force
Vector addition
two ways parallelogram method
Newtons 1st Law of Motion
Object at rest tends to stay at rest, an object at motion will continue to move at a constant velocity in a straight line, unless acted upon by another force
Newtons 2nd Law of Motion
Acceleration produced by a net force on an object is directly proportional to the magnitud
Newtons 3rd Law of Motion
For every action there is an equal land opposite reaction
Energy
Property of an object, or a system, that enables it to do work