Abeka Science Matter and Energy Test 7 Practice

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• What is conduction?
• Which description best fits a physical change?
• What does the law of conservation of mass state?
• What method would you use to separate salt from seawater?
• If resistance remains constant, doubling the voltage increases the power by a factor of four.
• What is Ohm's law expressed as an equation?
• A positively charged rod touches the top of an uncharged electroscope. Describe the leaves' movement when a negatively charged rod is brought near to the top of this electroscope.
• A heating coil has a resistance of 22 Ω and can safely handle 15 A of current. What is the maximum voltage that it can be connected to without burning out?
• What is the process of diverting unwanted electric charge directly into the earth called?
• Which statement is true about sound speeds in different media?
• Which process imparts electric charge to an object at a distance without direct contact between the objects?
• Which statement describes a physical change?
• What is the rate of electric charge flow?
• In a solution, which statement correctly describes the solute and the solvent?
• Which strategy improves the energy efficiency of a device?
• Which term best describes a material that is strongly attracted to magnets and can become a permanent magnet?
• Which term best describes a material that allows current to flow readily in a circuit?
• What is the volume of a regular-shaped object with length 3 cm, width 2 cm, and height 4 cm?
• In a sand and water mixture, which component passes through the filter?
• Which statement about atoms in matter is true?
• Which circuit protection device melts a thin strip of metal when overloaded?
• A resistor is connected to a 6 V battery. If the resistance is 3 Ω, what is the current?
• Which statement correctly describes the basic electrostatic interactions between charges?
• Why do objects appear colored?
• Which of the following is a form of energy?
• What term describes a substance that has several unpaired electrons per atom and is strongly attracted to magnets?
• In an electromagnet, increasing loops from 50 to 100 results in the strength quadruples.
• In Scenario 2, with one positive red ball and one negative blue ball on a smooth surface, when a second positive red ball is placed between them, the blue ball tends to move toward the middle red ball while the other red ball moves away. Which forces explain this behavior?
• What is an electrical circuit?
• A circuit that contains a complete path for electrons to flow through is a closed circuit.
• Which statement about energy forms is true?
• What is a hypothesis in a science experiment?
• What is a physical property? Provide an example?
• Name a measurable property used to identify substances.
• How do you find the volume of a regular-shaped object?
• Which circuit component is used to limit current flow?
• How can you strengthen the magnetic field produced by a coil?
• Which statement correctly defines acceleration?
• In a series circuit, how does the current behave?
• Which term describes the material property that governs how easily magnetic flux lines pass through a material?
• Which statement best describes the difference between a physical change and a chemical change?
• Which statement about physical properties is true?
• What is power in physics?
• Which device converts electrical energy into light and thermal energy?
• Which force causes an electric charge moving through a magnetic field to deviate from its original path?
• How does distillation separate a mixture based on boiling points?
• Which materials are attracted to magnets?
• Which statement best describes energy in a closed system during transformations?
• An electrical device designed to hinder current flow is a
• Which equation expresses Ohm's law to solve for current?
• Which statement best defines buoyant force?
• Two light bulbs are connected in parallel to a 6.0 V battery. Each bulb has a resistance of 10 Ω. What is the total resistance of the circuit?
• Which belt protects Earth from solar wind?
• What is the phase change from liquid to gas called?
• A material through which current does not easily flow is called a
• What is the phase change from liquid to solid called?
• What is potential energy?
• How do two like charges interact when brought close to each other?
• What is the difference between mass and weight?
• Which of the following is an example of a chemical change?
• What is a primary purpose of forming an alloy?
• Which term describes the force that causes a moving electric charge to deviate when it passes through a magnetic field?
• Which description best describes a region where the magnetic field has the same strength at all points?
• What is thermal energy?
• Why is wood a poor conductor of heat compared to metal?
• What is the phase change from gas to liquid called?
• If heat is transferred by convection, what is happening?
• Four light bulbs are connected in series to a 6.0 V battery. Each bulb has a resistance of 10 Ω. Calculate the total current through the circuit.
• What is a chemical property? Provide an example?
• What is a series circuit?
• What is the extent of a planet's magnetic field in space?
• What is radiation?
• What is the SI unit of resistance?
• What best differentiates an element from a compound?
• Which statement correctly describes the three classic states of matter and a key property of each?
• What is buoyancy and how does it relate to density?
• What determines the pitch of a sound?
• In a closed system, what happens to total energy as energy changes form?
• What term refers to the region where a planet's magnetic influence is detected?
• In a parallel circuit with bulbs, what happens to the brightness of existing bulbs if another bulb is added in parallel?
• If one wire is twice as long as another wire that is otherwise identical, what is true about their resistances?
• A device that opens or closes a circuit is a(n) ?
• How much power does a hair dryer use if it draws 15 A of current at 100 V?
• In a circuit with two resistors in series, each 6 Ω, connected to a 12 V battery, what is the current?
• How is a compound different from a mixture?
• In a parallel circuit, which statement is true?
• The force between two charged objects is 5.0 N. If one of the objects is replaced by an object with half the charge, what is the new force (assume distance is the same)?
• Is measuring the total resistance of a circuit before and after adding an extra bulb enough to determine whether the bulbs are in series or parallel? Why or why not?
• What does it mean for a solution to be saturated at a given temperature?
• When a solid chunk of ice is placed in warm water, is this a physical or chemical change?
• What determines whether an object sinks or floats in water?
• What moves through an electrolyte when electrical charge flows?
• What term describes an object with an equal number of positive and negative charges?
• Energy stored due to position is called what?
• Which of the following is an example of convection?
• Which statement describes reflection?
• What is a chemical change? Provide an example?
• Which of the following is NOT a factor that influences loudness?
• In a parallel circuit, the total current equals the sum of the currents through each branch.
• Earth's 'north-seeking' pole is called the ?
• What is diffusion and what causes it?
• In a first-class lever, where is the fulcrum located?
• How do you determine the density of an irregularly shaped object?
• An electromagnet's coil has 50 loops. What will happen to the strength of the electromagnet if another 50 loops are added?
• In a diamagnetic material, which statement is accurate?
• What happens to resistance as the diameter of a conductor increases?
• What is visible light?
• A circuit has a resistance of 20 Ω and a voltage across it of 60 V. What is the current?
• Which separation method removes water to leave salt behind when treating seawater?
• Which statement best describes which factor would not affect the color you see?
• Which term refers to the amount of matter in an object?
• In physics, what is work?
• Which energy form is associated with the random motion of particles and with temperature?
• If a metal block's density is greater than water's density, what happens?
• What is volume?
• How does increasing surface area affect the rate of heat transfer?
• Permeability is the extent to which a material can absorb or channel lines of flux.
• Two common signs that a chemical change has occurred?
• What is used to indicate the direction and strength of a magnetic field?
• A simple device that uses the laws of electrostatics to detect small electric charges is a(n) ?
• What do acids and bases produce in solution?
• What is refraction?
• Two charges in vacuum are 2.0 m apart. The strengths of the charges are 0.00030 C and 0.00080 C. What is the electric force between the charges? (k = 8.99 × 10^9 N m^2/C^2)
• What is insulation?
• Which statement correctly defines solvent and solute?
• If light travels from air into water and bends toward the normal, what phenomenon is this?
• What is the purpose of a material's specific heat capacity?
• In an electric circuit, how do series and parallel circuits differ?
• What happens to the total current flowing in a parallel circuit when more branches are added?
• What is buoyant force?
• What is a solution?
• Which statement best describes a physical change?
• Which phase changes release energy?
• In a solution, which statement correctly identifies solvent and solute?
• Which value equals the product of voltage and current in an electric circuit?
• Which term describes a substance with no net electric charge?
• Why are metals good conductors of heat?
• A device draws 8 A at 9 V. What is its power?
• What is a pure substance?
• What is the phase change from solid to liquid called?
• What is the unit of electrical resistance?
• Like magnetic poles repel each other.
• Which term describes a device that absorbs electrical energy and converts it to light or heat?
• Which is a chemical change?
• Name the three methods of heat transfer.
• What is the imaginary line that circles Earth halfway between the two magnetic poles?
• In an ideal simple machine, what happens to the total work?
• A magnet is cut in half. Why does this not form a monopole, even though one half contains the original north pole and the other half contains the original south pole?
• What circuit-protection device uses a narrow strip of metal to prevent excessive current through a circuit?
• What is a mixture?
• Which statement describes a simple machine?
• In which material does sound travel fastest?
• What distinguishes transparent, translucent, and opaque materials?
• What is a crystal lattice?
• How does filtration separate a mixture of sand and water?
• A balloon is rubbed with wool and sticks to a wall. Which statement best explains why the balloon sticks to the wall?
• During diffusion, what causes particles to spread out over time?
• How is density defined?
• What does the law of conservation of mass state in chemical reactions?
• What is the difference between matter and energy?
• What is the most important factor affecting the ease of current flow through a wire?
• What is convection?
• Three light bulbs are connected in parallel to a 12 V battery. Each bulb has a resistance of 14 Ω. What is the total voltage of the circuit?
• Which example best distinguishes kinetic energy from potential energy?
• What is the region of concentrated magnetism at the end of a magnet?
• In a parallel circuit, which statement is true about the voltage across each branch?
• A magnetically hard material is best described as which property?
• Which law relates current, voltage, and resistance?
• Which statement about visible light is false?
• Which example represents an element?
• Which device transforms the energy of an electric current into another useful form of energy?
• What is an alloy?
• Which statement is true about alloys?
• Which statement best defines magnetism?
• What does the law of conservation of energy state?
• What are the three fundamental states of matter?
• What is temperature?
• If a saturated solution at a given temperature has more solute added, what happens?
• Which formula represents Coulomb's law for the electric force between two point charges?
• What is an example of a first-class lever, and what is the principle behind it?
• Which factors influence the loudness of a sound?
• Which of the following is the SI unit of electric current?
• Which of the following describes the resistance of a magnet to being demagnetized by another magnetic field?
• What is the approximate value of the speed of light in a vacuum?
• If the voltage in a circuit doubles while the resistance stays the same, what happens to the current?
• Which statement best distinguishes mass from weight?
• If two point charges of opposite sign are separated by distance r, and the distance is doubled, what happens to the magnitude of the electric force between them?
• Which statement best describes a simple machine?
• Three resistors of 5 Ω, 5 Ω, and 10 Ω are connected in series. What is the total resistance?
• Which statement is true about a coil's magnetic field when current increases?
• Power of electric current is given by P = V I.
• If a substance has a high specific heat capacity, which statement is true?
• Which term describes a substance that has several unpaired electrons per atom and is strongly attracted to magnets?
• If an object floats, what can be inferred about its density relative to the surrounding fluid?
• Which statement best describes a physical change?
• For two resistors in parallel, which expression correctly represents the total resistance?
• Which belts of charged particles located above Earth's equator protect Earth from the solar wind?
• How is heat transferred?
• A shield for computer circuitry is made from a highly permeable substance to do what?
• Three identical resistors of 6 Ω are connected in parallel to a 12 V battery. What is the total current drawn from the battery?
• Which term describes the work per unit charge done to move electric charges between different parts of an electric field?
• What method of magnetism is used when a needle is magnetized by holding a magnet near the needle?
• In a parallel circuit, the reciprocal of total resistance equals the sum of reciprocals of the individual resistances.
• What kind of electric field has equal strength throughout?
• Which phase changes require energy input, and which release energy?
• Which description best defines sound energy?
• Which statement about light at a boundary is correct?
• Which term describes a material that has zero electrical resistance under certain conditions?
• Which temperature scale is preferred in scientific measurements?
• If you increase mass while keeping volume constant, what happens to density?
• Which term describes the ability to do work or cause change?
• In which medium is the speed of sound fastest?
• How do you determine the volume of an irregular-shaped object?
• Which of the following is NOT a form of energy listed among common energy forms?
• A diamagnetic substance is described as having no unpaired electrons and being repelled by a magnetic field.
• What is an object capable of attracting materials by a magnetic force?
• Why is a control group important in an experiment?
• How do simple machines affect work input and output?
• Which factor increases the rate of heat transfer?
• What happens to kinetic energy when particles move faster?
• Heat transfer by radiation occurs how?
• Which term describes energy due to motion?
• What is density and how is it calculated?
• What causes a light ray to bend when entering a different medium?
• Which property would you use to identify a substance by its boiling behavior?
• A material through which current flows easily is a
• What happens to light when it hits a mirror?
• What makes a material a good conductor? What about a good insulator?
• Which of the following is an example of a reversible physical change?
• Which factor most directly affects the resistance of a wire?
• What is the orientation of the lines of flux when the inclination at the magnetic poles is 90°?
• Identify an example of energy being transformed.
• A material that allows current to flow through it with no resistance is called a
• Differentiate between temperature and heat.
• Give an everyday example of a physical change.
• What causes metals to transfer heat quickly?
• Which description correctly defines a homogeneous mixture?
• How does increasing temperature typically affect the solubility of most solids in liquids?
• What is electrification by friction?