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135 Cards in this Set
- Front
- Back
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Like charges
a. attract eachother b. first attract and then repel each other c. do not affect each other d. repel each other |
D
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lightning is a powerful form of electric
a. circuit b. insulation c. current d. discharge |
D
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often, when 2 objects are rubbed together
a. one object loses electrons and the other gains electrons b. one object loses electrons c. one object gains electrons d. both objects lose electrons |
A
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When a neutral object gains electrons
a. it stays neutral b. its overall charge is positive c. its overall charge is negative d. it loses the same number of electrons simultaneously |
C
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When an electroscope knob is touched with a positively charged glass rod, electrons are transferred to the rod by
a. induction b. conduction c. reduction d. insulation |
B
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Static electricity is not produced by
a. friction b. insulation c. induction d. contact |
B
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when a glass rod loses electrons as the result of being rubbed with silk
a. the rod becomes charged, but the silk remains neutral b. both rod and silk remain neutral c.the charge on the silk is positive d. the charge on the glass rod is positive |
D
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If a negative charged rubber rod touches the knob of a uncharged electroscope, the leaves of the electroscope
a. gain positive charges b. hang straight down c. gain negative charges d. attract each other |
C
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If an object contains more electrons than protons, it is said to be
a. positively charged b. neutral c. negatively charged d. energized |
C
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A force of attraction would exist between a
a. proton and a neutron b. neutron and an electron c. proton and a proton d. proton and an electron |
D
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When speaking of an object's ability to become electrically charged, it is important to remember that
a.only the protons move b. only the electrons move c. both the protons and the neutrons move d. both the protons and the electrons move |
B
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As the distance from a charged particle increases, the strenth of its electric field
a. increases b. decreases c. remains the same d. first increases and then decreases |
B
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Glass, rubber, and wood are examples of good electric
a. conductors b. inductors c. insulators d. radiators |
C
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A flashligh battery is an example of a
a. wet cell b. dry cell c. thermocouple d. fuse |
B
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a thin wire or filament creates
a. more resistance to the flow of electric current b. less resistance to the flow of electric current c. no resistance to the flow of electric current d. no difference in resistance as compared to a thick wire |
A
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Which of the following is the correct relationship among power, current, and voltage?
a. P =I/V b. P = I x V c. V = P x I d. E = P x t |
B
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Electric discharge is a
a. loss of static electricity b. gain in static electricity c. gain in both positive and negative charges d. loss of positive charges |
A
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For electricity to flow through a circuit, the circuit must not be
a. open b. in series c. closed d. in parallel |
A
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Which of the following would not be part of an electric motor?
a. permanent magnet b. an electromagnet c. brushes d. a turbine |
D
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Which of the following best describes what type of magnetic poles the domains at the north pole of a bar magnet have?
a. south magnetic poles only b. north magnetic poles only c. north and south magnetic poles d. no magnetic poles |
C
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The number of magnetic poles in a bar magnet is
a. 4 b. 3 c. 2 d. 1 |
C
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When magnetic domains become randomly arranged,
a. objects gain magnetic properties b. the north poles point in the same directions c. magnets lose their magnetic fields d. magnetic fields group together |
C
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Magnetic fields are described using
a. lines of force b. electrical current c. energy d. galvanometers |
A
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What happens to the magnetic force as the distance between two magnetic poles increases?
a. it remains the same b. it increases c. it decreases d. it depends upon the type of pole |
C
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Commutators are parts of
a. transformers b. AC electric motors c. DC electric motors d. all electric motors |
C
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In an unmagnetized object, the domains point
a. in the same direction b. in a north-south direction c. in different directions d. in an east-west direction |
C
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The generators at the base of a dam covert the ______ of the falling water into electrical energy
a. potential energy b. thermal energy c. magnetic energy d. kinetic energy |
D
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Electromagnets are
a. permanent magnets b. temporary magnets c. single pole magnets d. positively and negatively charged |
B
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The magnetic field of a magnet is felt
a. between like poles only b. around the whole magnets c. at the poles only d. between like poles only |
B
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A coils magnetic field can be flipped by
a. increasing the number of loops b. decreasing the number of loops c. reversing the direction of the current d. using a direct current |
C
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What is the result of chemical bonding?
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the formation of a new substance
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During what type of bonding does the transfer of electrons occur?
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ionic bonding
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What will a negatively charged ion bond with?
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a positively charged ion
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What does the formation of a chemical bond involve?
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only the electrons
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In what type of bonding does the sharing of electrons occur?
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covalent bonding
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Why does chemical bonding occur?
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so the atoms can obtain complete outermost energy levels
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What does an ionic bond result from?
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attraction between oppositely charged ions
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What hapens to the charge of an atom when it loses electrons?
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it becomes positively charged
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What type of bond holds together the atoms in a sample of aluminum?
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metallic
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A sodium atom has
a. a stable configuration b. 1 outer electron c. a mass number of 11 d. 7 outer electrons |
B
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When the outermost energy level contains the maximum number of electrons...
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the atoms are stable
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When ionic bonding occurs between 2 atoms,
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one atom loses electrons while the other atom gains electrons
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What happens to the charge of an atom when it gains electrons?
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it becomes negatively charged
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A covalent bond is really the attraction between...
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oppositely charged ions
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The nucleus of an atom
a. occupies most of the atom's volume b. is only a small part of the atom's volume c. contains 1/2 of the electrons in the atom d. contains only a small amount of the atom's mass |
B
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An atom of carbon whose mass is 14amu differs from an atom of carbon whose mass is 12amu in that it has
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2 more neutrons
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The nuclei of atoms have what charge?
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positive
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All atoms are electrically
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neutral
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If an isotope of sulfur has 16 protons, 17 neutrons, and 16 electrons, its mass number is
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33amu
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Almost all of the mass of an atom is found in the
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nucleus
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the atomic number of magnesium is 12. its nucleus must contain
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12 protons and no electrons
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the atomic number of an element indicates the
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number of protons
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What is the mass of a neutron
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1amu
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What is the mass of a proton?
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1 amu
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What is the mass of an electon?
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1/1836amu
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What is the location of the neutron?
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nucleus
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what is the location of the proton?
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nucleus
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what is the location of an electron?
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electron cloud
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what is the charge of a neutron?
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0
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What is the charge of a proton?
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1+
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What is the charge of an electron?
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1-
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Substances which enter into a chemical reaction are called
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reactants
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When 2 substances combine chemically, the properties of the products are
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different from the properties of the reactants
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What information does a chemical equation give about a chemical reaction?
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the kinds and numbers of atoms involved in the reaction
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A chemical reaction in which an element replaces an element within a compound is a
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single replacement reaction
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What happens to heat energy in an exothermic reaction?
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heat energy is released
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When a chemical reaction occurs,
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new substances are formed
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While performing a chemical reaction, a student touches the side of thecontane holding the reactant and notices that it feels very warm. The reaction must be...
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exothermic
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Heat energy is absorbed during what kind of reaction?
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endothermic reaction
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The substances to the left of the arrow in a chemical equation ae called
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reactants
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The law of conservation of mass states that
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in a chemical reaction, the totamass of the reactants must be equal to the total mass of the products
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In a balanced equation,
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atoms are conserved
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Two or more simple substances combine to for a new substance in a
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synthesis reaction
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Chemical reactions are related to chemical bonding in that
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during chemical reactions bondsbetween atoms must be broken or formed
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The substances formed as a result of a chemiccal reaction ae called
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products
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When 10g of hydrogen gas reacts with oxygen gas, 90g of water is produced. How much oxygen gas reacted during this change?
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80g
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When a transverse wave travels through a medium, which way does the matter move?
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at right angles to the direction of the wave
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The maximum distance a wave displaces the particles in a substance it passes through from their rest position is
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amplitude
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The speed of sound waves in air is less than the speed of sound waves in steel due to the air's
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lesser density
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Through which ofthe following can sound waves NOT travel?
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outer space
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What property of a wave is measured in hertz?
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frequency
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The highest point of a wave is called a
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crest
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As a sound wave passes through a substance, the space in which the particles are far apart is called the
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rarefaction
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Waves may travel through
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solids, liquids, gasses, and vacuums
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The distance from one point on a wave to the same point on the next wave is called the
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wavelength
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An ocea wave is an example o what kind of wavee?
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transverse
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The speed of a wave depends mostly upon the
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substance it passes through
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waves which cannot travel through space
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Travel both the air ata speed of about 340m/s
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Are both transverse and compressional
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
D
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Is made of rarefactions and compressions
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Used for radio, telephone, and television transmission
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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Transfer energy from one place to another
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
C
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are created by vibrating electric charges
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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A disturbance in the particles which make up matter
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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are created when n object which moves back and forth
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Decibel is used to measure a characteristic of this wave
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Can travel atseeds up to 300 000km/s
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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Travel fastest when the particles which make up matter are closest together
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Waves which require a medium
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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are longitudial waves
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Travel slowest in solids
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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Are mechanical waves
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
A
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Have frequencies measured in Hertz
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
C
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are transverse waves
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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Have both wavelength and frequency
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
C
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their energy is radiant energy
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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light
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
B
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Are used in medical imaging
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
C
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are caused by vibrations
a. sound waves b. electromagnetic waves c. both waves d. neither wave |
C
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The basic building block of all matter is the
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atom
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In general, when elements combine chemicaly,
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new substances with new and different properties are formed
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One characteristic which distinguishes a mixture from a pure substance is
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in mixturesth different substances can be present in varying amounts
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When water is heated, its temperature
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rises until the boiling point is reached
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The properties of a compount are
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different from theprperti of the elements which make it up
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Throug chemical changes baking soda can be broken down into several other substances. This would indicate that baking soda is a
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compound
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A substance that contains only one kind of atom is called a
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element
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a compound is a combination of
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2 or more elements
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a solution is a
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homogeneous mixture
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The faster a fluid moves, the
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less pressure it exerts
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Pressure is measured in what unit?
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N/square centimeters
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at any given depth, the pressure exerted by a fluid is
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equal in all directions
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In hydraulic lifts, the piston with the smaller surface area has
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the smaller force
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the direction of a buoyant force on an object paced in fluid is
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opposite the gravitatonal force on that object
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When the temperature of a gas is increased, the pressure within the gas will
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increase
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according to Boyle's Law, if the volume of a gas is decreased,
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the pressure will go up
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In terms of density, Archimedes' principle states that an object will float in a fluid if the density of the fluid is
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greater than the density of the object
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Fluid pressure is calculated by
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dividing force by area
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At high altitudes, there are
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fewer particles of air and decreased air pressure
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The direction of fluid pressure is
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in all directions
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According to Archimedes' Principle, the buoyant force on an object is
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equal to the weight of the displaced fluid
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When a submarine rises
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its weight is less than the weight of the displaced water
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The principl applied to the design of an airplane wing was developed by
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Bernoilli
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An example of a hydraulic system is
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the brakes on a car
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What happens to the volume of a balloon when the air within it is heated
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volume increases
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