STAAR Science Grade 8 2019 (tagged to 2021 standards)
Quiz by Grade 8 Science - Texas Education Agency
Grade 8 STAAR Test (Adopted 2021)
Science (2021)
Texas Essential Knowledge and Skills (TEKS)
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- Q 1/42Score 0
The chart lists organisms in five different categories living near the Texas Gulf Coast.
Based on the chart, which food chain best models a flow of energy in this ecosystem?
29Sun $\longrightarrow$ Pygmy sunfish $\longrightarrow$ Shrimp $\longrightarrow$ Wood ducksSun $\longrightarrow$ Algae $\longrightarrow$ Shrimp $\longrightarrow$ Red drumSun $\longrightarrow$ Willow oaks $\longrightarrow$ Algae $\longrightarrow$ River ottersSun $\longrightarrow$ Mosquitoes $\longrightarrow$ Shrimp $\longrightarrow$ Coyotes
42 questions
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- Q1
The chart lists organisms in five different categories living near the Texas Gulf Coast.
Based on the chart, which food chain best models a flow of energy in this ecosystem?
Sun $\longrightarrow$ Pygmy sunfish $\longrightarrow$ Shrimp $\longrightarrow$ Wood ducksSun $\longrightarrow$ Algae $\longrightarrow$ Shrimp $\longrightarrow$ Red drumSun $\longrightarrow$ Willow oaks $\longrightarrow$ Algae $\longrightarrow$ River ottersSun $\longrightarrow$ Mosquitoes $\longrightarrow$ Shrimp $\longrightarrow$ Coyotes30s7.12(A) - Q230s7.9(B)
- Q3Atoms of which two elements have a combined total of 23 protons?Copper, Cu, and zinc, ZnSodium, Na, and magnesium, MgBoron, B, and carbon, CNone of these30sC.6(B)
- Q4
The spectral classes of four stars are shown in comparison with a Hertzsprung-Russell diagram.
Based on the information, which star is most like the sun?
Star 1Star 3Star 2Star 430s8.9(A) - Q5Primary succession occurs when pioneer species move into an area that has no plants. Which organisms are common pioneer species?Vines and shrubs that help prevent the erosion of shallow soilMosses and lichens that can grow on rocky surfacesGrasses and weeds that arrive as seeds carried by the wind and then germinate in rich soilConifer trees and tall grasses with roots that loosen the soil30s8.12(B)
- Q6
A mother and daughter press their hands together and then push apart while ice skating.
Immediately after they push away from each other, how does the motion of the mother and daughter change?
The mother moves forward, and the daughter moves backward with a greater acceleration.The mother moves backward, and the daughter moves forward with a greater acceleration.Both move backward, but the daughter moves with a greater acceleration.Both move forward, but the mother moves with a greater acceleration.30s6.7(B) - Q7A teacher asks students to make a model of a transform plate boundary. The students use blocks to represent tectonic plates and slide the blocks past each other in the directions of the arrows as shown. Which event can the students best demonstrate with their model?Formation of a rift valleyAn earthquakeA volcanic eruptionBuilding up of a mountain30s7.KS(10)
- Q8Which statement best describes evidence that a chemical reaction occurs as a cake bakes?The water in the cake batter is used to keep the cake moist as it bakes.The cake takes the shape of the container in which it is baked.The water in the cake batter evaporates.The cake rises as gas bubbles form in the baking cake.30s8.6(E)
- Q9A group of students used this diagram to classify three organisms into different kingdoms. Which table correctly identifies the three kingdoms?30s6.13(B)
- Q10A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?Does the material feel hard to the touch?Will the material float in water?Is the material malleable or ductile?Does the material feel rough or smooth?30s6.6(C)
- Q1130s6.7(B)
- Q12Wild hogs introduced to Texas from Europe became feral after the hogs escaped from the ranches where they lived. Feral hogs are omnivores that feed on native plants, crops, and small animals. Feral hogs can damage an ecosystem by rooting through the soil to look for food and trampling small plants. Which types of native organisms do feral hogs most likely compete with for food sources?Herbivores and carnivoresDecomposers and herbivoresProducers and decomposersCarnivores and producers30s6.12(A)
- Q13A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when pressure is applied to it. Based on this information, the element could NOT be a member of which group on the periodic table?Group 12Group 18Group 8Group 230sC.5(A)
- Q14A demonstration helps students understand a principle of roller coaster design. Which answer choice correctly describes the ball’s kinetic and potential energy?The potential energy and kinetic energy of the ball are equal at position X.The ball has more potential energy at position X than at position Z.The potential energy and kinetic energy of the ball are greatest at position Z.The ball has more kinetic energy at position Y than at position W.30s6.8(A)
- Q15What are the main functions of the human skeletal system?To regulate the composition of body fluids by removing metabolic wastes and retaining a balance of water, salt, and other nutrientsTo support the body, protect the organs, produce blood cells, and store calciumTo enable the diffusion of oxygen into the bloodstream and the removal of carbon dioxide from the bloodstreamTo regulate and maintain bodily functions by producing hormones and releasing them into the bloodstream30s7.13(A)
