Studied by 1 personA measurement standard is defined as ____.
The exact quantity people agree to use for comparison
The prefix kilo- means ____.
1000
The prefix milli- means ____.
0.001
The correct symbol for the SI unit of temperature is ____.
K
The SI unit that is used to measure time is the ____.
second
The variable plotted on the horizontal or *x-*axis is called the ____.
independent variable
How many meters are there in 1,865 cm?
18.65
In a graph showing temperature change of a material over time, temperature change is the ____.
dependent variable
The best type of graph to use to show how some fixed quantity is broken down into parts is ____.
circle graph
One benefit of the SI system is that it is ____.
its based on multiples of 10
A beaker contains 0.32 L of water. What is the volume of this water in milliliters?
320 mL
A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?
600
The lightbulb is an example of ____.
technology
Another term for technology is ____.
applied science
The process of gathering information through the senses is called ____.
observation
When designing an experiment, the first step is to ____.
state the problem
A rule or principle that describes what happens in nature is a ____.
scientific law
An explanation of an event that is based on repeated observations and experiments is a ____.
theory
An idea, event, or object can be represented by a ____ to help people better understand it.
model
In an experiment to determine whether the popping of popcorn is affected by the temperature at which it is stored, counting the popped kernels is an example of a(n) ____.
observation
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the ____.
control
A factor in an experiment that changes from the manipulation of the independent variable is the ____.
dependent variable
A factor that does NOT change in an experiment is the ____.
constant
Studying the effect of one thing on another in order to test a hypothesis is a(n) ____.
experiment
A factor that is manipulated in an experiment to change the dependent variable is the ____.
independent variable
The application of scientific knowledge to help people is ____.
technology
List the following from smallest to largest (dekameter, centimeter, decimeter, millimeter, kilometer)
millimeter, centimeter, decimeter, dekameter, kilometer
Scientists does research on the topic
gather information
Scientists make an observation and ask a question they want to answer about it
state the problem
Scientists makes an educated prediction
Form Hypothesis
Scientist tests the hypothesis to determine the effect of one thing on another using controlled conditions
experiment
Scientists carefully look at the data they collect and determine what it is actually saying.
analyze results
Scientists decide whether or not they should accept or reject their hypothesis based on the data.
drawing conclusions
What part of the experiment was the food?
constant
What part of the experiment was the heartbeat?
dependent variable
What part of the experiment was the water temperature?
constant
What part of the experiment was population two?
control
What part of the experiment was the caffeine?
independent variable
An object in motion at a constant velocity will change its motion only if a balanced force acts on it.
False
The relationship s = d/t can be used to calculate speed, distance or time.
true
If you were trying to get out of the way of a storm, you would need to know ONLY the speed at which it was moving.
false
In a car crash, inertia could cause you to crash into the windshield.
true
When the forces acting on an object are unbalanced, the net force is zero.
false
Acceleration occurs when velocity changes.
true
In the equation a = (Vf – Vi)/t, Vf stands for
final velocity
___ is a measure of how far an object has moved.
distance
An object changing its speed from 10 m/s to 3 m/s is undergoing ____ acceleration.
negative
The speed and direction with which an object moves is its ____.
velocity
As a car slows down approaching a red traffic light its ______ is negative.
acceleration
Acceleration occurs when an object changes its ______ or ______ both.
speed, direction
The slope of the distance-time graph gives the ______.
speed, velocity
If the forces acting on an object at rest are _______, the object will remain at rest
balanced
The equation used to find acceleration is a = ____.
vf – vi/t`
A horizontal line on a velocity/time graph shows ____ acceleration.
zero
Inertia varies depending on ____.
mass
The relationship among speed, distance, and time is ____.
s= d/t
3 m/s north is an example of a(n) ____.
velocity
Motion is a change in ____.
position
A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?
600
Newton's first law of motion is also called the law of ____.
inertia
A merry-go-round horse moves at a constant speed but at a changing ____.
velocity
Acceleration is rate of change of ____.
velocity
A single point on a distance-time graph tells the ____.
instantaneous speed
If you ride your bicycle down a straight road for 500 m then turn around and ride back, your distance is ____ your displacement.
greater than
If you ride your bike up a hill, then ride down the other side, your acceleration is ____.
first negative, then positive
The speed you read on a speedometer is ____.
instantaneous speed
Balanced forces acting on an object cause the object to accelerate.
false
Gravity causes all falling objects to accelerate at a rate of 98 m/s2.
false
Acceleration is defined as the rate of change of position.
false
The momentum of a 5,000-kg truck that is standing still is greater than the momentum of a 3,000-kg truck that is also at rest.
false
Projectile motion is composed of only a horizontal velocity.
false
When an object falls, it is reacting to the force of gravity.
true
Jane is on a merry-go-round that is moving at a constant speed. Her velocity is also constant.
false
Momentum is a property of an object and cannot be transferred from that object to another object.
false
Objects in Earth's orbit appear to be weightless because they are in free fall.
true
Friction is a force that encourages motion between two surfaces that are touching each other.
false
The greater an object's mass, the weaker the gravitational force on it.
false
When a ball is dropped, it falls down due to the force of friction.
false
To continue pushing a box up a hill (assume the box is already in motion), you have to overcome static friction.
false
A box doesn't move when you push it because of rolling friction.
false
The upward force on an object falling through the air is ____.
air resistance
The relationship among mass, force, and acceleration is explained by ____.
newtons 2nd law of motion
A feather will fall through the air more slowly than a brick because of ____.
air resistance
In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.
fall at the same rate
The acceleration due to gravity is ____.
9.8 m/s^2
According to Newton's second law of motion, ____.
F = m ´ a
When an object moves in a circular path, it accelerates toward the center of the circle as a result of ____.
centripetal force
The path of a projectile is ____.
curved
For any object, the greater the force that's applied to it, the greater its ____ will be.
acceleration
The size of the gravitational force between two objects depends on their ____.
masses and the distance between them
As you get farther from the center of Earth, your weight will ____.
decrease
When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called ____ forces.
action-reaction
A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____.
has greater mass
In the equation p = m × v, the p represents ____.
momentum
The statement "to every action there is an equal and opposite reaction" is ____.
newton’s 3rd law of motion
he unit of momentum is ____.
kg ´ m/s
When two balls collide, the momentum of the balls after the collision is explained by ____.
the law of conservation of momentum
An object that is in free fall seems to be ____.
weightless
If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.
travel horizontally
A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. Assume the string breaks at point A. In which direction will the ball be traveling an instant later?
direction d
Note
Flashcard