9TH GRADE PHYSICAL SCIENCE FINAL EXAM QUESTIONS WITH CORRECT ANSWERS 100% 2024, Exams of Advanced Education

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9TH GRADE PHYSICAL SCIENCE

FINAL EXAM QUESTIONS WITH

CORRECT ANSWERS 100% 2024

9TH GRADE

What are pieces of information collected by observations? - CORRECT ANSWERS-Data Which of the following is an example of quantitative data? A. Notes of a symphony from a patterned structure B. The wavelength of a color is 785 nanometers. C. An ape often walks on 4 limbs D. 25 scientists agree that the electron is a particle E. None of the above - CORRECT ANSWERS-B Observations that describe an event or condition are called _____ data. - CORRECT ANSWERS-Qualitative Repeating an experiment to ensure the validity of the results is _____. - CORRECT ANSWERS-Verifying Which of the following would be an acceptable definition of science? A. The study of things that did not originate supernaturally B. All observations using instruments C. The scientific method D. The systematic method of making observations E. All/none of the above are acceptable - CORRECT ANSWERS-D What describes consistent patterns or phenomena in nature? - CORRECT ANSWERS-Law What is an accepted explanation for an observed phenomenon? - CORRECT ANSWERS-Theory Kepler's observation that planets orbit the sun in elliptical paths is a law because A. God designed planets to do that B. It describes the way planets move

C. It explains why planets move that way D. Scientists in the past made it a law E. All/none - CORRECT ANSWERS-B Science cannot answer the question 100% 2024 BY ELITAA A. How can we find a cure for AIDS? B. What is the purpose of my life? C. What is the relationship between tsunamis and earthquakes? D. Is it possible to send men to Mars? E. All/none - CORRECT ANSWERS-B T/F Science can be considered a source of settled truth. - CORRECT ANSWERS-F T/F Any observation to be considered scientific must be directly observable. - CORRECT ANSWERS-F T/F A scientific hypothesis is simply a guess at an explanation for phenomenon, without the need to reference any other information or professional knowledge. - CORRECT ANSWERS-F T/F The theory of biological evolution is not a scientific theory. - CORRECT ANSWERS-F T/F Theories and laws serve different purposes and have different functions. - CORRECT ANSWERS-T T/F Science is approached with an unchanging, specific sequence of steps. - CORRECT ANSWERS-F T/F The best reason to study science is to answer a question. - CORRECT ANSWERS-F T/F A good hypothesis is stated in an if...then form. - CORRECT ANSWERS-T What are the particles that make up all matter are called? - CORRECT ANSWERS-Atoms Which part of an atom makes up most of its mass? - CORRECT ANSWERS- Nucleus Which part of an atom makes up most of its volume? - CORRECT ANSWERS- Electron cloud Which of the following statements about matter is true?

S,L,G Particles are arranged in a fixed repeating pattern - CORRECT ANSWERS-Solid S,L,G Lowest energy - CORRECT ANSWERS-Solid E,C,Ho,He Naproxen sodium - CORRECT ANSWERS-Compound E,C,Ho,He Iodine - CORRECT ANSWERS-Element E,C,Ho,He Platinum gold alloy - CORRECT ANSWERS-Homogenous mixture E,C,Ho,He Orange juice without pulp - CORRECT ANSWERS-Homogenous mixture E,C,Ho,He Hydrogen chloride - CORRECT ANSWERS-Compound E,C,Ho,He Crunchy peanut butter - CORRECT ANSWERS-Heterogenous mixture E,C,Ho,He Gravel - CORRECT ANSWERS-Heterogenous mixture E,C,Ho,He Purified air - CORRECT ANSWERS-Homogenous mixture E,C,Ho,He Nickle - CORRECT ANSWERS-Element E,C,Ho,He Paper bag - CORRECT ANSWERS-Heterogenous mixture E,C,Ho,He Apple sauce - CORRECT ANSWERS-Heterogenous mixture All of the certain digits plus one uncertain digit in a measurement. - CORRECT ANSWERS-Significant Figures If you were to multiply 153.0 in by 50.0 in, how many SigFigs should you have? - CORRECT ANSWERS- Four instruments give 4 different masses for the same object. If the acceptable value is 3.45g, which instrument is most precise? A. 3.56g B. 3.4512g C. 3.45240g D. 3.4681263g - CORRECT ANSWERS-D Four instruments give 4 different masses for the same object. If the acceptable value is 3.45g, which instrument is most accurate? A. 3.56g B. 3.4512g

C. 3.45240g D. 3.4681263g - CORRECT ANSWERS-B Which of the following can be a source of error in measurement? A. The person measuring B. The object being measured C. The conditions of measuring D. The instrument used to measure E. All/none - CORRECT ANSWERS-E Which of the following statements is false? A. Measurements usually do not fall directly on a scale marking. B. Every scientific measurement contains some error. C. Complete accuracy is impossible in scientific measurements. D. If a measurement is precise, then it is always accurate. E. Measurements should always include one place of estimation. - CORRECT ANSWERS-D A certain scale's smallest decimal graduation is the hundredth of a gram. Which measurement from this scale is reported correctly? A. 450.3556g B. 467,003g C. 0.466g D. 0.04654g E. All/none - CORRECT ANSWERS-C When adding the following: 5.20cm+563.809cm+123,737.1cm, to which place value should the answer be rounded? - CORRECT ANSWERS-0. The magnitude part of a vector is a... - CORRECT ANSWERS-Scalar Which of the following is a vector quantity? A. Mass B. Force C. Density D. Time E. All/none - CORRECT ANSWERS-B If you were observing a plane from an orbiting satellite, what is the reference frame? - CORRECT ANSWERS-Rotational What condition does not necessarily result in acceleration? - CORRECT ANSWERS-Change of position Studying the aerodynamics of how a wind turbine moves in a wind tunnel would be... - CORRECT ANSWERS-Kinematics

D. Your hair stands up when you're touching a static electricity generator. E. All/none - CORRECT ANSWERS-B Which situation doesn't involve friction? A. A ball rolling down a hill B. An object floating in space C. A raindrop sliding down a window D. A man walking on an even surface E. All/none - CORRECT ANSWERS-B Which of the following is the result of a field force? A. An apple press squeezes out apple cider B. When you jump into the air, you land on the ground. C. An airplane is jostled around because of wind. D. Girls win against guys in tug-of-war. E. All/none - CORRECT ANSWERS-B Which of the following aren't directly proportional? A. Weight and mass B. Distance and gravitational force C. Speed and distance traveled D. Mass and gravitational force E. All/none - CORRECT ANSWERS-B Which of the following is not a fundamental force? A. Gravitational B. Electrical C. Strong nuclear D. Weak nuclear E. All/none - CORRECT ANSWERS-B What is the strongest fundamental force? - CORRECT ANSWERS-Strong nuclear Which example of friction occurs in fluids? A. Wheels rolling B. Skier skiing C. Flying a plane D. Walking on wet stairs - CORRECT ANSWERS-C T/F Friction is proportional to the surface area of contact between two objects. - CORRECT ANSWERS-F T/F Two objects never touch on the particle level because of contact forces. - CORRECT ANSWERS-F

T/F Friction and gravity are two forces that affect all motion on the earth. - CORRECT ANSWERS-T T/F Kinetic friction is greater than static friction for any two identical substances. - CORRECT ANSWERS-F T/F A microscopic organism like an amoeba can exert a gravitational force. - CORRECT ANSWERS-T Stored energy or energy at rest - CORRECT ANSWERS-Potential energy Energy in motion - CORRECT ANSWERS-Kinetic energy T/F A falling snowflake can have both kinetic and potential energy at the same time. - CORRECT ANSWERS-T T/F All physicists agree that there are nine forms of energy. - CORRECT ANSWERS-F T/F Most energy is actually a form kinetic or potential energy. - CORRECT ANSWERS-T T/F Chemical energy is a form of potential energy bound up in the bonds between atoms. - CORRECT ANSWERS-T (Energy) Charging your cell phone uses this - CORRECT ANSWERS-Electrical (Energy) Related to the motion of particles - CORRECT ANSWERS-Thermal (Energy) Fusion in starts is powered by this - CORRECT ANSWERS-Nuclear (Energy) The flow of electrons across a conductor - CORRECT ANSWERS- Electrical (Energy) Energy possessed by objects in motion or with the potential to move - CORRECT ANSWERS-Mechanical (Energy) Listening to music - CORRECT ANSWERS-Acoustic (Energy) Wave energy that can travel through a vacuum - CORRECT ANSWERS-Light (Energy) Radio waves - CORRECT ANSWERS-Light Wave energy that must have matter to transport it - CORRECT ANSWERS- Acoustic

What is the mechanical advantage of a single-moveable pulley? - CORRECT ANSWERS- What is the IMA of gears? - CORRECT ANSWERS-Resistance teeth/effort teeth What determines the classification of levers? - CORRECT ANSWERS- Placement of the effort force, resistance force, and fulcrum T/F More power allows a machine to get the same amount of work done in less time. - CORRECT ANSWERS-T T/F Only third class levers can have mechanical advantages of less than one.

• CORRECT ANSWERS-F T/F A weightlifter holding 800N motionless above his head is doing work. - CORRECT ANSWERS-F T/F Whenever something is moving, work is being done. - CORRECT ANSWERS-F T/F Doing work on an object can increase its speed - CORRECT ANSWERS-T Pressure changes in a contained fluid are distributed equally in all directions throughout the fluid. - CORRECT ANSWERS-Pascal's principle Immersed objects are buoyed up by a force equal to the weight of the volume of fluid displaced. - CORRECT ANSWERS-Archimedes's principle Only constant is the amount of gas - CORRECT ANSWERS-Combined gas law Force acting on a surface - CORRECT ANSWERS-Pressure Accounts for changes in P,V,T and amount of gas - CORRECT ANSWERS-Ideal gas law Constant=T; P and V are inversely proportional - CORRECT ANSWERS-Boyle's law Fluid's motion on a curve - CORRECT ANSWERS-Coanda effect Constant=P; V and T are directly proportional - CORRECT ANSWERS-Charles's law T/F Fluid pressure is partially determined by gravity - CORRECT ANSWERS-T

T/F Pressure is always measured in comparison to a standard pressure - CORRECT ANSWERS-F T/F Temperature is a significant factor in determining hydrostatic pressure. - CORRECT ANSWERS-F T/F Pascal's principle does not always apply to gas systems. - CORRECT ANSWERS-T T/F Hydraulic machines operate according to Archimedes's principle. - CORRECT ANSWERS-F T/F Bernoulli's principle applies only to ideal fluids, which experience no friction. - CORRECT ANSWERS-T T/F Bernoulli's principleis responsible for most of the lift produced by an airplane wing. - CORRECT ANSWERS-F Increasing volume of a balloon while keeping temp constant will cause the pressure to... - CORRECT ANSWERS-Decrease If temp is held constant and pressure increases, the volume will... - CORRECT ANSWERS-Decrease What is directly related to hydrostatic pressure? - CORRECT ANSWERS- Surface area Fluid pressure isn't affected by... - CORRECT ANSWERS-The density of the fluid Which condition is not necessary for the application of Pascal's principle? A. A gaseous fluid B. An incompressible fluid C. A sealed container D. All E. None - CORRECT ANSWERS-A The pressure of gas is not dependent on... - CORRECT ANSWERS-Volume If the volume of a container doubles while the pressure is constant the temp will... - CORRECT ANSWERS-Double If pressure is doubled and volume is doubled, then the temp must... - CORRECT ANSWERS-Quadruple

Which family of mostly nonmetals is the most reactive? - CORRECT ANSWERS-Halogens Which family is made of monatomic gases? - CORRECT ANSWERS-Noble gases What is the best definition of an element? - CORRECT ANSWERS-A pure substance made of only one kind of atom What element doesn't really fit with its group? - CORRECT ANSWERS- Hydrogen Which of the following statements is false? A. All diatomic elements are nonmetals. B. Nonmetallic element properties are more varied than metallic element properties. C. Alkaline-earth metals are only slightly more reactive than alkali metals. D. Most transition elements have either one or two valence electrons. E. None - CORRECT ANSWERS-C Which of the following statements is true? A. Conductivity increases with atomic number left to right across a period. B. The number of valence electrons increases left to right across a period C. The likelihood of an element being a gas decreases from left to right across a period. D. The most reactive of all element families is on the far right of the period. E. All of these are true - CORRECT ANSWERS-B Chemical bonds involve mainly... - CORRECT ANSWERS-Valence electrons What holds covalent molecules together if they form a crystalline solid? - CORRECT ANSWERS-Intermolecular forces The vast three dimensional particle structure of an ionic compound is called a... - CORRECT ANSWERS-Crystal lattice Electrons in metallic bonds are... - CORRECT ANSWERS-Mobile What is the smallest form of an ionic compound called? - CORRECT ANSWERS-Formula unit When a metal forms an ionic bond, the resulting positively charged ion is called what? - CORRECT ANSWERS-Cation When a nonmetal forms an ionic bond, the resulting negatively charged ion is called what? - CORRECT ANSWERS-Anion

Which statement explains accurately why atoms normally form bonds? A. To satisfy the first law of thermodynamics B. In order to achieve greater amounts of complexity C. Because they want to have a full, stable valence shell like the noble gases D. Because the shape of the bond can affect its properties E. All/none - CORRECT ANSWERS-C The electron sea theory accurately describes which kind of bond? - CORRECT ANSWERS-Metallic T/F Unpaired atoms are where covalent bonds form. - CORRECT ANSWERS-T T/F Polar diatomic molecules are partially charged on each end. - CORRECT ANSWERS-T T/F The bond between Na and Cl in NaCl is an example of a purely ionic bond. - CORRECT ANSWERS-F T/F Electron loss by an element bonded in a compound is indicated by a negative oxidation number. - CORRECT ANSWERS-F T/F The charge of an ion and its oxidation number are the same thing. - CORRECT ANSWERS-F T/F Decomposition reactions always have one reactant. - CORRECT ANSWERS-T T/F Composition reactions always contain at least three elements - CORRECT ANSWERS-F

100% CORRECT ANSWERS