Piner 8th Grade Science STAAR Practice & Review - 2025
Quiz by Devin Turk
Grade 6
Science (2021)
Texas Essential Knowledge and Skills (TEKS)
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Measures 44 skills from
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282 questions
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- Q1Which of the following is an example of a heterogeneous mixture?SaltwaterSugar solutionAirSalad30sSCI.8.6A
- Q2What is formed when two or more elements chemically combine in fixed proportions?A compoundA mixtureAn elementA solution30sSCI.8.6A
- Q3Which of the following best describes a homogeneous mixture?Different substances visibleEasily separated by physical meansVaried composition at each pointUniform composition throughout30sSCI.8.6A
- Q4Which type of matter consists of only one type of atom?An elementA heterogeneous mixtureA homogeneous mixtureA compound30sSCI.8.6A
- Q5Which of the following elements is represented by the symbol 'Na' on the periodic table?SodiumMagnesiumPotassiumCalcium30sSCI.8.6B
- Q6Which element is commonly used in reaction with acids to produce hydrogen gas and has the symbol 'Zn'?ZincCopperAluminumIron30sSCI.8.6B
- Q7What is the element with the atomic number 8, known for being a crucial part of water and necessary for respiration?NitrogenCarbonHeliumOxygen30sSCI.8.6B
- Q8Which element has the symbol 'Cl' and is commonly used in the form of a compound for disinfecting water?IodineFluorineChlorineBromine30sSCI.8.6B
- Q9Which element is represented by the symbol 'Fe' and is essential for the formation of hemoglobin in the blood?SilverZincIronCopper30sSCI.8.6B
- Q10What property of water allows small insects, like water striders, to walk on its surface without sinking?Surface tensionAdhesionCohesionDensity30sSCI.8.6C
- Q11Which property of water is responsible for allowing water droplets to stick to a spider web?CohesionEvaporationAdhesionSurface tension30sSCI.8.6C
- Q12How does cohesion contribute to the formation of water droplets on a leaf?Cohesion causes water molecules to repel each other, spreading out on the leaf.Adhesion breaks down water molecules, preventing droplet formation.Cohesion causes water molecules to stick together, forming droplets.Surface tension causes water to evaporate, leaving no droplets.30sSCI.8.6C
- Q13What is the role of adhesion in the transport of water in plants?Adhesion causes water to evaporate from the leaves, aiding in transport.Adhesion helps water to move up plant stems by sticking to the plant's xylem walls.Adhesion dissolves nutrients in the soil, improving water absorption.Adhesion prevents water from moving upwards, keeping it in the roots.30sSCI.8.6C
- Q14Which phenomenon allows water to bead up on a waxy surface like a car hood?Cohesion and adhesion make water seep into the surface.Only adhesion causes water to spread over the surface.Surface tension and cohesion cause water to form beads.Water expands due to surface tension, forming a film.30sSCI.8.6C
- Q15Why can water rise in a narrow tube against the force of gravity, as seen in capillary action?Surface tension makes water expand and rise.Because of cohesion alone pushing water upwards.Due to adhesion and cohesion working together to pull water up.Water density decreases in the tube causing it to rise.30sSCI.8.6C