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60 Cards in this Set
- Front
- Back
The ability of a measurement to be reproduced with the same result is a sign of accuracy
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false; it is a sign of precision
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A kilogram is 1,000 times as large as a gram.
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true
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A circle graph is based on percentages.
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true
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Speed is often measured in kilometers per hour
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false;meters per hour
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A line graph shows the relationship between three variables.
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false; 2 variables
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When a substance burns matter is created.
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false;matter is transferred
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Elements on the far left of the periodic table are classified as metals
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true
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Every atom of the same element has the same atomic number
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false; has the same state of matter.
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Matter always has mass
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true
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Matter in which particles are arranged in a repeating geometric pattern is called an amorphous solid
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false; crystalline solid
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Oil will float on water because oil is less dense than water
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true
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Temperature is the measure of the average kinetic energy of a substance
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true
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Pascal's principle explains the relationship between density and buoyancy
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false;Archimedes principle
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When a gas condenses to a liquid it absorbs heat from its surroundings
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false; releases moisture
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The rate of evaporation of a liquid decreases a the temperature decreases.
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true
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Density is an example of a size-dependent property
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false; size-independent property
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Volume is an example of a size-dependent property
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true
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One of the chemical properties of acids is that they corrode metal
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true
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When acids react with bases, a salt is formed
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true
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A physical property is a characteristic of something that allows it to change to something new
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false; chemical property
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The loss of beachfront due to erosion of sand by the ocean is an example of physical weathering
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true
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Motion is a change in direction
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false; position
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If you are driving up a curvy mountain road, your displacement would be greater than your distance
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false; less
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A line on a speed-time graph with a steep slope indicates a greater speed
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true
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To find acceleration, subtract the final velocity from the initial velocity and divide by the time
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false; subtract the initial speed from the final speed
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The slope of the line on a speed-time graph tells the speed
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false;acceleration
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A falling leaf has less momentum than a pile of leaves on the ground
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false; more
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As a moving objects velocity decreases, its momentum decreases
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true
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The momentum before a collision of three objects is always greater than the momentum after the collision.
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false; equal to
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Earth exerts an unbalanced force on a ball thrown into the air
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true
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Balanced forces acting on an object cause the object to accelerate
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false;unbalanced
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Cars, airplane wings and bike helmets are built in a streamlined shape to reduce inertia
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false;friction
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The force of gravity causes all objects near Earth's surface to fall with an acceleration of 20 m/s2
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false;9.8m/s2
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The critical velocity is the highest velocity that can be reached by a falling object
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false;terminal
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A car goes around a curve at a constant speed. There is not a net force acting on it.
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false; there is
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An object with a mass of 9.0 kg has an acceleration of 3m/s2. The force acting on it is 3N
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false;27N
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The outward force from a surface is the net force
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true
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When you push downward on Earth to make a pole vault, earth exerts an equal force on the pole
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true
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Forces always act alone.
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false; in pairs
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The acceleration of an object is always in the direction of the net force acting on it
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true
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To go around a curve, a bicycle must feel a force in the direction of its motion
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false;in the opposite direction
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You see a kite start to fly because heat has been transferred to it
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false; kinetic energy
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As you decrease the velocity of a car, you increase its kinetic energy
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false; decrease kinetic energy
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A heated iron has chemical energy
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true
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In a electric mixer, electrical energy is changed into thermal energy
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false; kinectic
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A turbine turns kinetic energy into electrical energy
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false; generator
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The burning of fossil fuels can result in acid rain
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true
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Fossil fuels are a renewable resource
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false; nonrenewable
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Geothermal energy in nonrenewable
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false; alternative energy
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Most energy sources have some kind of negative consequence
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true
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Water waves can move a piece of cork floating on top of the water only in an up and down motion
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true
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Mechanical waves can travel in any type of medium
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true
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Radio waves are the only type of electromagnetic wave that is a transverse wave
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false
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Sound wavs are compressional waves
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true
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The amplitude of a wave is the distance between a point on one wave and the identical point on the next wave
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false;it is 1/2 the distance between a crest and a trough
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In general, the more energy a wave has the greater its amplitude
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true
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The speed of light depends on the medium it travels through
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true
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You can see yourself in a mirror because of the wave property called interference
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false; reflection
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Refraction occurs when the amplitude of a wave changes as it goes from one medium to another
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false; bends
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You can hear sounds around the corner of a door due to the wave property called diffraction
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true
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