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Science Test #1
Terms in this set (57)
What is Mr. Lewis' definition of science?
Search for truth through observation and experimentation.
What are the first five steps of the scientific method?
Define the problem, make observations, hypothesis, experimentations, conclusion.
The variable chosen to be modified by the experimenter in order to affect something else is called the ________ variable?
What is the metric unit for mass?
What is the metric unit for volume?
What is the metric unit for length?
Density is ______ / _______
The units of density are ______/_____
Theories are ________ used to explain or make difficult to understand situations more clear.
Scientific ______ are true everywhere in the universe for all things at all times.
What is the definition of physics?
It deals with matter and energy.
What is the difference between speed and velocity?
Speed is a scaler and velocity is a vector.
On a distance versus time graph graph the slop of the line would be the objects ________?
What is a vector?
Direction & Magnitude
For an object to change its motion a ____ ______ must act on the object.
If an object is falling on or near the surface of the earth it will always experience a _______ _______
Who came up with the Law of falling bodies?
What is Newton's first law?
Law of inertia = things acceleration in the direction of the force being applied to it.
What is Newton's second law?
Law of acceleration/force F=ma
What is Newton's third law?
Law of momentum = every action has an equal or opposite reaction
The path describe by the motion of any projectile thrown through the air is called what?
Weight is the mass of an object x __________
pull of gravity
What is the definition of energy?
The ability to do work
What is the difference between kinetic and potential energy?
Kinetic - energy because of movement.
Potential - energy because of position.
Thermal energy is also known as what?
______ has the highest heat capacity of any readily available substance.
Fossil fuels account for what percent of our total energy consumption.
Wind and solar account for what percent of our total energy consumption?
How much has solar increased in the past 10 years?
What energy source is the most concentrated and produces no atmospheric waste?
List 3 problems with fossil fuel.
Dirty, location, non-renewable/limited
List 3 advantages of Nuclear power.
Clean, cheap, abundant uranium
A possible unit for speed is what?
meters per second
A possible unit of acceleration is?
meters per second squared
Summarize Galileo's Law of falling bodies?
Objects will fall at the same rate regardless of mass.
Speed is a scaler or a vector?
velocity is a scaler or a vector?
Distance is a scaler or a vector?
Displacement is a scaler or a vector?
What is the mathematical definition of Newton's 2nd law?
The path of a projectile is called what?
How do you calculate weight in newtons?
mass x 9.8 m/s (squared)
Balanced and unbalanced forces are called what?
US is the ____ consumer of petroleum
US is the __ producer of petroleum
Amount of total energy produced by solar and wind power.
Amount of electrical energy produced by nuclear power
Fossil fuels account for what % of energy use
Kelvin, Celsius, Ferenhiet
Unit for energy
Unit for power
Unit for Force
Aristotle's ideas of motion
objects fall to the center of all things
What is the NAS definition of Science?
Seeking a naturalistic explanation.
What is potential energy?
Energy because of position
What is kinetic energy?
Energy because of movement
Newton's universal law of gravitation
Things fall at 9.8 rate
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