Abeka Science Matter and Energy Test 7 Practice

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