The process of trying to understand the world is called...
Science -
REASONING: Science is performed any time you try to understand the natural world.
100
Which is distance divided by time?
Velocity? Speed? Acceleration?
Speed -
REASONING: Speed covers distance divided by time.
100
Measurements are used for which of the following?
Description? Explanation? Interpretation?
Description -
REASONING: Measurements provide details, or data, that describe the results of scientific research.
100
Which is a form of energy an object has if it is moving?
Kinetic? Potential? Thermal?
Kinetic -
REASONING: Kinetic energy is the form of energy possessed by moving objects.
100
Which is not a physical state of matter?
Vacuum? Solid? Liquid?
Vacuum -
REASONING: Solid, liquid, and gas are the three physical states of matter.
200
Constants in an experiment DO NOT change or DO change?
DO NOT change -
REASONING: Everything besides the variables in an experiment must be controlled.
200
Something is in motion if it __________.
Changing properties? Changes distance? Changes position?
Changes position -
REASONING: When an object changes position, it is in motion.
200
What SI Units would you use to measure the length of your finger?
Centimeter
200
Which is the ability to cause change?
Work? Energy? Power?
Energy -
REASONING: Energy is transferred from one object to another when a change occurs.
200
Solids have a __________ shape and volume.
Changing? Definite? No?
Definite -
REASONING: Solids retain physical shape and the same volume.
300
Information that is gathered during experiments is called...
Data
300
Displacement measures the _________ between the starting and stopping points.
Mass & Volume? Distance & Direction? Distance & Speed?
Distance & Direction
300
You want to find out how much water an aquarium tank can hold. Which SI measurement unit would you use?
Liter -
REASONING: A liter is the best unit of measurement to use to find the volume of water in an aquarium tank.
300
Which of the following objects has kinetic energy?
A bicycle parked at the top of a hill?
A ball rolling across the floor?
Leaves lying on the ground beneath a tree?
A ball rolling across the floor?
300
Particles with more energy move __________ than particles with less energy.
Slower & farther apart?
Faster & farther apart?
Slower & closer together?
Faster & farther apart -
REASONING: More energy causes particles to move faster, which pushes them farther from each other.
400
SI stands for...
International System of Units -
REASONING: SI was designed to provide a world-wide standard of physical measurement for science, industry, and commerce.
400
When something slows, its acceleration is __________.
Positive? Negative? Constant?
Negative -
REASONING: Slowing results in a negative acceleration.
400
Convert 45 meters to centimeters.
450 centimeters
400
What two factors determine how much kinetic energy an object has?
Position & Mass? Speed & Position? Speed & Mass?
Speed & Mass -
REASONING: Kinetic energy depends on the mass and speed of the moving object.
400
The force exerted on an area is known as __________.
Pressure? Volume? Specific Heat?
Pressure -
REASONING: Force divided by area results in pressure.
500
Which is the application of science to make tools that people can use?
Technology? A Trial? Control?
Technology -
REASONING: Computers, calculators, and the Internet are examples of modern technology.
500
On a speed–time graph in which the line is level, the acceleration is __________.
Zero? Negative? Positive?
Zero -
REASONING: A flat line on an acceleration graph indicates zero acceleration.
500
Convert 4 centigrams to kilograms
.0004 kilograms
500
During energy transformations, energy is never __________.
Used to increase an object's potential energy?
Created or destroyed?
Completely transformed?
Created or destroyed -
REASONING: The law of conservation of energy states that energy is never created or destroyed.
500
What causes surface tension?
Particles of a liquid pushing up on the surface?
Particles of a liquid pushing on the sides of a container?
Particles of a liquid pulling along the surface?
Particles of a liquid pulling along the surface -
REASONING: Surface tension occurs when the particles of a liquid pull along the surface while there are no particles pushing down on the surface.