GMAS 8th Grade Science Practice Test

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• A property that allows an object to exert an electric force on another object without touching it.
• Which term describes a homogeneous mixture whose particles are so small they won't settle?
• The rate of change of position is called what?
• What is gravity?
• What is the name of the chart that organizes elements by increasing atomic number?
• How does the law of conservation of energy apply in simple machines?
• In which type of mixture are the different materials easy to distinguish?
• Which term describes a shape that is curved inward?
• Law that energy cannot be created or destroyed is called what?
• Which term describes energy that can move through empty space without a medium?
• What is a biosphere-level cycle?
• Positively charged nuclear particles are called what?
• Which term describes a closed, conducting path?
• Which term describes a mixture that is uniform throughout but not necessarily a single substance?
• Which statement about energy transfer by waves is true?
• Which equation correctly relates distance, speed, and time?
• A material that doesn't allow heat to flow through it easily is called a heat insulator.
• Negatively charged particles that orbit the nucleus?
• What term describes thermal energy that flows from a higher temperature to a lower temperature?
• What is an aquifer?
• A change of one substance to another, like burning or rusting?
• What distinguishes scientific evidence from personal opinion?
• Which planet is closest to the Sun and is rocky?
• Which term describes a circuit that allows electric current to flow?
• Which of the following is evidence that supported early continental drift proposals?
• Which statement describes gravity in the context of orbital motion?
• The tendency to resist changes in motion is called what?
• A material that does not allow electrons to move easily through it.
• Which term describes the property that may describe flammability or reactivity?
• What is the distance between any two troughs or any two crests on a wave?
• A wave phenomenon involving waves bending around a barrier.
• Which statement about mass and weight is true?
• Which statement about Earth's crust is accurate?
• Metalloids are best described as
• If mass number is 23 and atomic number is 11, how many neutrons does the atom have?
• Which term describes the movement of weathered material from one location to another?
• A closed, conducting path.
• Which pair lists two examples of chemical weathering?
• The unit used to measure frequency is?
• Which term describes a substance made of two or more elements joined in a fixed ratio?
• The term for speed with direction is what?
• What is a food chain?
• When a wave strikes a surface and bounces off, this is called?
• Which sequence describes the water cycle in the correct order?
• In a series circuit, the current is what in all components?
• What is the independent variable in an experiment testing how sunlight exposure affects plant growth?
• Matter that waves travel through is called what?
• Which state of matter has particles that move more freely past each other but aren't free to move far apart?
• Which process forms sedimentary rocks by compaction and cementation of sediments?
• How do weathering and erosion differ?
• Which organism is commonly a producer in aquatic ecosystems?
• Which expression represents kinetic energy?
• Which term describes energy in the form of motion?
• What do the terms porosity and permeability describe in soils?
• How can igneous rocks become sedimentary rocks?
• Which circuit contains two or more branches for current to move through?
• Which term describes a characteristic observable without changing the identity of a substance?
• What is velocity and how is it different from speed?
• Which statement about static friction versus kinetic friction is true?
• In a parallel circuit, if one path fails, what happens to the others?
• Energy stored in chemical bonds is called what?
• What is reflection in waves?
• Which statement best summarizes Newton's Second Law?
• Which electromagnetic wave is commonly used in medical imaging?
• What term refers to a homogeneous mixture that will never settle and has particles too small to be detected by a microscope?
• Center of the atom that contains protons and neutrons
• What phenomenon explains the change in perceived pitch when a moving sound source approaches or moves away from the listener?
• Which state of matter is characterized by particles packed tightly and vibrating in place?
• A substance that is either an element or a compound is called a?
• Transpiration is the process by which water is released as vapor from plant leaves. Which choice correctly describes this process?
• What are two major lines of evidence for plate tectonics?
• What are the three main layers of the Earth?
• The gravitational force on an object is called what?
• What is a food web?
• What happens to most energy as it moves through an ecosystem?
• Which phrase describes a change in size, shape, or state of matter?
• If voltage increases while resistance remains the same, what happens to current?
• In magnets, which poles attract?
• Which energy form increases with height above the ground for a given mass and gravity?
• Which term best fits a material that does not allow electrons to move easily?
• Nuclear particles with no charge?
• The rate of change of velocity is called what?
• How does photosynthesis use light energy to form chemical energy?
• What does the mass number represent?
• Mass is neither created nor destroyed/ same before and after reaction
• What is potential energy?
• Besides the fit of continents, which other evidence supports plate tectonics?
• Which statement best describes metals, metalloids, and non-metals?
• If distance is 800 m and time is 200 s, what is speed?
• Which process changes the identity of a substance?
• What term describes the distance between two successive crests in a transverse wave?
• Which law states that an object at rest or in uniform motion in a straight line unless acted upon by an external force?
• Which plate boundary type is characterized by fault lines and horizontal sliding past one another?
• If a circuit has a break that prevents current from flowing, this circuit is called what?
• What term describes the sum of the kinetic and potential energy of all molecules in an object?
• Which type of wave has the medium move back and forth in the same direction the wave travels?
• Which pair lists two examples of physical (mechanical) weathering?
• What is a chemical bond?
• In a transverse wave, what is the lowest point called?
• Why do we observe different Moon phases?
• Which quantity has magnitude only and no direction?
• In the chemical formula H2O, what does the subscript 2 indicate?
• A bending of waves around a barrier is called?
• In which type of wave does the medium move back and forth perpendicular to the direction of travel?
• Which statement correctly describes the behavior of waves at a boundary when they return after hitting it?
• What word describes the substance through which a wave travels?
• Which energy source do producers primarily use to make food?
• Which term describes a substance with a fixed composition made from one kind of material?
• Which state of matter has no definite shape or volume because particles are far apart?
• Which energy form is energy stored in chemical bonds?
• What is the distance between one point on a wave and the nearest point like it (such as compression to compression or rarefaction to rarefaction)?
• The atomic number is equal to the number of what particles?
• The number of waves that pass each second is called?
• In a parallel circuit, how does the total current relate to branch currents?
• Doppler effect true statement?
• What is net force?
• A material that allows electrons to move easily through it.
• Which method of heat transfer occurs through direct contact between objects?
• What causes solar and lunar eclipses, respectively?
• What type of wave is produced by a vibrating object and travels through matter?
• Positively charged nuclear particles?
• Which of the following represents Ohm's Law?
• What is the standard unit used to measure time in the metric system?
• The process by which a substance becomes a different substance?
• Which term best describes the collection of radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays?
• What drives the movement of Earth's tectonic plates?
• Sea-floor spreading provides evidence for plate tectonics by showing what process?
• Which term describes energy stored due to an object's position?
• What is the speed of light in a vacuum?
• Which statement describes energy transfer by conduction, convection, and radiation?
• What is the formula to calculate distance when speed and time are known?
• Which unit is distance measured in?
• Mechanical energy is defined as what?
• Which factor generally increases friction between two surfaces in contact?
• What is a producer in an ecosystem?
• Low frequency electromagnetic waves with long wavelengths are called?
• Non-metals are usually
• Which circuit has only one loop for current to flow through?
• Which term describes energy transfer in a fluid by movement of heated particles?
• How do mantle convection currents relate to plate motion?
• If a car travels 120 meters in 30 seconds, what is its speed?
• Smallest piece of matter that still retains the property of the element
• If you double distance with speed constant, what happens to time?
• What is the term for the process that forms sedimentary rocks by cementing and compressing sediments?
• What are the four components of soil?
• What does a chemical formula indicate?
• Which quantity related to energy of a wave measures distance from the rest position to the crest?
• Which statement about kinetic energy is true?
• Doppler effect is the change in perceived pitch caused by the relative motion between what two elements?
• What is static friction and how does it differ from kinetic friction?
• The unit commonly used to express how often a wave occurs per second.
• Which term describes a characteristic of a substance that indicates it can undergo a chemical change, such as burning?
• Which term describes a substance formed when atoms of two or more elements combine in a fixed proportion?
• Which statement correctly defines momentum?
• Which statement describes Newton's Third Law?
• Which property is typical of metals?
• Which of the following is an example of a biogeochemical cycle mentioned?
• What term describes a circuit that does not allow electric current to flow?
• Which statement about the periodic table is correct?
• High frequency electromagnetic waves with short wavelengths are called?
• Which rock type is formed when molten material cools and solidifies?
• Which term describes a material that resists heat flow?
• Infiltration is the process by which water moves where?
• Which method of heat transfer occurs in fluids by movement of heated particles?
• How is weather different from climate?
• Which term describes a mixture in which two or more substances are blended evenly throughout?
• The range of electromagnetic waves that humans can detect with their eyes is called?
• If an atom has 15 protons and a mass number of 31, how many neutrons does it have?
• What is the bending of waves as they pass from one medium to another due to a change in speed?
• What is momentum and how is it conserved in a closed system?
• What is the highest point of a transverse wave called?
• Which statement accurately contrasts electromagnetic waves with mechanical waves?
• Which statement best describes permeability?
• Which term describes a shape curved outward?
• Which form of matter contains positively and negatively charged particles at very high temperatures, such as in stars?
• Which state of matter is found in stars and contains charged particles?
• In a series circuit, how many paths exist for the current?
• What is the basic unit of an element that maintains its properties?
• Which term describes the bending of a wave as it passes from one medium into another?
• Which pairing correctly matches a plate boundary type with a typical feature it creates?
• Which side of the periodic table primarily contains metals?
• Energy is defined as what?
• What does Newton's first law of motion state?
• What is the flow of electric charges through a wire or conductor called?
• The height of a transverse wave from the rest position to the crest describes which property?
• Refraction occurs under which description?
• Which expression represents speed?
• A push or pull that changes an object's motion, measured in newtons, is called what?
• Energy stored by an object's height above Earth's surface is called?
• What is gravity and how does it influence orbits?
• What is acceleration?
• Mass is a measure of what property of matter?
• Which statement best describes how energy changes in a simple machine?
• How would you describe a hypothesis versus a scientific theory?
• If you double the net force on an object while mass stays the same, what happens to acceleration?
• In a fair experiment, what is the purpose of a control group?
• What do you call a substance in which all the atoms are alike?
• Which quantity describes the amount of matter in an object?
• Which statement about the visible spectrum is true?
• What term describes how many wave cycles pass a given point each second?
• What is a circuit?
• What is the formula to calculate time if distance and speed are known?
• Which process in the rock cycle changes existing rocks into metamorphic rocks due to heat and pressure?
• Which term refers to the group of waves including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays?
• What opposes motion between two surfaces in contact?
• What is energy stored due to position called?
• Which method of heat transfer occurs through electromagnetic waves such as sunlight?
• How can human activities impact climate change?
• If a rock has high porosity but low permeability, which statement is true?
• What is the rock cycle?