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Practice Test 5 - Middle School Earth and Space Science

19 of the 20 questions below are in this test; the other one can't be scored yet. Answer them in any order, then submit to see your score and every explanation.

  1. A class compares two resources used for energy. Resource X forms over millions of years. Resource Y can be replaced in a few years if managed carefully. Both are being used every day. Based on the formation/replacement times, which statement is supported?
  2. A map shows South America and Africa outlines plus a mid-ocean ridge. The seafloor age bands are symmetric on both sides of the ridge, but the coastlines do not match perfectly. Which statement is supported by the evidence?
  3. A student says: "Oil isn't limited because we can always make more next year." The student's teacher points out that oil forms from buried organisms over millions of years, while people can pump and burn large amounts in decades. Which statement best corrects the student using the evidence about time and rate?
  4. A model shows a planet orbiting the Sun. The Sun is labeled larger mass and the planet smaller mass. Gravity arrows point from the planet toward the Sun, and the planet has a motion arrow along its orbit path. Which choice is a model that correctly represents gravity's role in keeping the planet bound?
  5. A class is helping a community garden reduce plastic pollution from plant pots. Evidence: In one month, the garden threw away about 120 cracked plastic pots, and pieces of plastic were found in the soil near the trash area. Constraints: The garden has storage space for only one small bin (about the size of a recycling bin) and volunteers meet only on Saturdays. The goal is to reduce plastic waste going to the landfill while still growing the same number of seedlings. Trade-offs are required. Which limit is most realistic given the context?
  6. Why is erosion important to material cycling?
  7. A hillside shows two kinds of surface change. Over many seasons, rainwater has carved shallow grooves that slowly deepen into small channels. After a night of heavy rain, a large section of the slope suddenly slid downhill, leaving a fresh, bare scar and a pile of soil at the bottom. Which process changed Earth's surface more quickly, based on the evidence, and how does speed connect to the type of change? (Both slow and fast processes shape Earth.)
  8. The map shows three locations on the same continent, all near sea level: X at 5°N near the coast, Y at 25°N inland, and Z at 45°N near the coast. Long-term temperature averages decrease from X to Y to Z. Choose the ONE supported explanation that best fits the geographic context.
  9. A community near a river has frequent floods. The town can choose one main strategy this year: (1) build homes on higher foundations and use water-resistant materials, or (2) paint "NO FLOOD" signs along the river to discourage flooding. Which strategy reduces flood risk, and why does it reduce impact rather than prevent the hazard?
  10. Three interactions are being compared using models at different scales: • Local/object–object: A student holds a magnet and a metal washer; the washer moves, but that is not gravity. • Solar system: The Sun holds Earth in orbit. • Galaxy: The combined mass of the Milky Way keeps the Sun moving around the galaxy's center. Where is gravity's influence strongest (most able to control motion) in the model set?
  11. Model: A galaxy cluster model shows a dense core (many galaxies close together) and a less dense outer region. The arrows for galaxies near the core form a rough circle around the center, showing organized motion. Which explanation best connects the evidence in the model to gravity shaping large-scale structure over long times?
  12. Model: A student draws a diagram of a satellite moving around Earth. The satellite's motion arrow is tangent to its path (sideways along the orbit). The student also draws a gravity (force) arrow pointing toward Earth. A classmate claims: "Gravity only affects objects that are falling straight down, so it does not affect satellites moving sideways." Which evaluation is best supported by the model?
  13. A factory uses water to cool machines and releases the warmed water back into a river. When production increased, the factory's water use rose from 2 million liters/day to 5 million liters/day. River temperature downstream increased by 2°C during operating hours, and fish were seen avoiding the warmest area. Which statement is best supported by the evidence about how consumption affects Earth systems? (Impacts depend on the amount and rate of use.)
  14. Two landforms are shown side by side. Landform X is a narrow V-shaped valley with a stream at the bottom and arrows showing running water moving downhill. Landform Y is a wide U-shaped valley with arrows showing ice moving downhill. Multiple processes can act on the same surface. Which comparison is supported by the evidence in the diagram?
  15. A teacher asks students to separate likelihood from impact using drought data. Use the table to choose the statement that is supported.
  16. A farmer notices that the dark, fertile topsoil on a hillside field has become thinner after many seasons of heavy rain. The farmer learns that forming a thick layer of fertile soil can take hundreds to thousands of years, but erosion can remove it in just a few storms if the ground is bare. Which claim is incorrect based on this evidence?
  17. Use the simplified rock-cycle model below (no fixed starting point; rocks can change types over time). Model arrows: - Any rock --weathering & erosion--> Sediments --compaction--> Sedimentary rock - Sedimentary rock --heat & pressure--> Metamorphic rock - Metamorphic rock --melting--> Magma/Lava --cooling--> Igneous rock - Igneous rock --heat & pressure--> Metamorphic rock Which statement is NOT supported by the model?
  18. Prediction: On the map, natural gas fields (gray stars) are concentrated in a lowland sedimentary basin. Thick, clay-rich soils (brown shading) occur mainly in the same lowland. A new, unmapped area labeled "Lowland Extension" has the same basin rock type as the lowland. Based on the pattern, which resource is most likely to be found in the Lowland Extension?
  19. A classroom is testing ways to reduce paper waste. For 4 weeks, they tracked how many sheets of paper were thrown away each week. Solution 1: Put a "use both sides" reminder poster. Solution 2: Add a scrap-paper tray for reuse. Evidence: - Baseline (before any solution): 500 sheets/week thrown away. - After Solution 1 (2 weeks): 430 sheets/week. - After Solution 2 (2 weeks, poster still up): 300 sheets/week. Success criteria: reduce paper thrown away by at least 35% from baseline. Solutions vary in effectiveness. Based on the evidence, which statement is best supported?
  20. A scientist compares two maps of the same hillside. The later map shows thicker soil and more sediment collected at the bottom of the slope, while the upper slope shows more exposed bedrock. Which process best explains the change over time? (Multiple processes may contribute to surface change.)

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