Properties And Composition Of Matter Unit Test: Question Preview (ID: 27445)


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Which statement correctly describes how a sound wave travels through air?
a) the wave carries molecules of air away from the source of the sound b) the wave carries energy that causes molecules to move back and forth c) The wave carries a molecule in one direction until it collides with another molecule d) The wave moves through the air and gains energy from the moving molecules that it touches
Which best explains the relationship between the electromagnetic spectrum and light?
a) Visible light is the part of the electromagnetic spectrum that can be seen with the eye. b) Ultraviolet light is the part of the electromagnetic spectrum that can be seen with the eye. c) Visible light and infrared light are the parts of the electromagnetic spectrum that can be seen d) Ultraviolet light and infrared light are the parts of the electromagnetic spectrum that can be seen with the eye
How are electromagnetic waves different from other waves?
a) They have very short wavelengths? b) They transmit energy instead of matter? c) They can travel through a vacuum and through matter d) They can change direction by reflection when they strike an object
Which best explains the relationship between the speed of sound and the medium through which it passes?
a) Sound travels faster in solids because of the increased distance between solid particles. b) Sound travels faster in air because of the decreased distance between air particles. c) Sound travels slower in air because of the increased distance between air particles d) Sound travels slower in solids because of the decreased distance between solid particles
How does sound usually travel?
a) An object vibrates, and those vibrations travel through the air in one direction as transverse waves b) An object vibrates, and those vibrations carry air in one direction as longitudinal waves c) An object vibrates, and those vibrations carry air in all directions as transverse waves d) An object vibrates and those vibrations travel through the air in all directions as longitudinal waves
During a science experiment, a group of students dropped a sugar cube into a cup of boiling water. Within seconds, they noticed that the sugar cube had disappeared. What can be inferred from this?
a) The sugar cube was soluble, and therefore dissolved in water b) The students were wizards and they used a magic trick to make the cube disappear c) The sugar cube combined with other elements in the water and formed a new substance d) The cup of boiling water was so cold that the sugar cube quickly froze and stuck to the cup where it could not be seen
What happens to a substance when there is a physical change?
a) The atoms of the substance are rearranged b) The atoms of the substance disappear completely c) The atoms of the substance stay the same d) The atoms of the substance reproduce, which creates more atoms in the substance
How is a chemical change different from a physical change?
a) A chemical change only changes the appearance of the substance, while a physical change changes the substance's identity b) chemical changes often involve explosions while physical changes are always safe c) physical changes often involve explosions but chemical changes are always safe d) A physical change changes the appearance of a substance while a chemical change changes the substance's identity
Which statement best explains the origins of the term atom?
a) The ancient Greeks came up with the term because an atom looks a lot like the “adam’s apple in a male’s neck b) The ancient Greeks were led by a man named Adam who agreed that the particles could be named after him c) The ancient Greeks found no smaller particles and therefore named the particles atoms which means uncuttable d) The ancient Greeks drew the term atom out of a hat of terms proposed to describe the tiny particles
Which statement most accurately describes the relationship between temperature and states of matter?
a) All states of matter have the same basic range of temperatures b) A substance's state of matter can change in response to a change in temperature c) All substances have the same melting point and boiling point as water d) There is no noticeable relationship between temperature and states of matter
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