Practice Test 8 - 5th Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- A student says, "The reason the ball falls is that it moves down toward the ground." Why is this not a complete explanation?
- Which evidence supports the argument that the sun appears brighter than other stars because it is closer?
- A neighborhood plants street trees; how are communities using science to protect air quality?
- Carlos investigates composting; he reads a city brochure, watches an educational video, and observes school compost bins; why combine sources?
- In the campfire example, why do farther stars appear dimmer from Earth?
- In deserts, how does wind (atmosphere) moving sand affect landforms (geosphere)?
- In this forest cycle: Trees use CO2 and minerals → caterpillars eat leaves → birds eat caterpillars; fungi/bacteria decompose dead matter → nutrients to soil. How does matter cycle between living things and the environment?
- Based on the description, what are the three main organism groups in ecosystems?
- How does energy flow from grass to a rabbit in this food chain?
- Based on the observations in Jamal's notebook, which statement best describes the type of change when he mixed salt and water? Jamal's Notebook Entry (Oct. 15) - Before: "Clear water in cup. White salt crystals in spoon." - During: "Crystals got smaller when I stirred. No bubbles." - After: "Water stayed clear. I could not see crystals, but it still tasted salty (not tested in class)."
- Which element does a plant get mainly from carbon dioxide (CO₂) in air?
- Comparing the substances before and after mixing, a student stirred cocoa powder into warm milk. Before mixing: - Cocoa powder: brown, Solid, powdery, 22°C - Milk: white, Liquid, 35°C After mixing: - Chocolate milk mixture: light brown, Liquid, 35°C, smooth (no dry powder on top) Which property did NOT change when the substances were mixed?
- Emma froze a cup of water weighing 200 g; after freezing, how did weight compare?
- A model shows fog forming when water vapor cools; how do hydrosphere and atmosphere interact?
- Sofia drinks through a straw and the juice rises up into her mouth. How do air particles help explain this?
- Marcus left a chunk of dry ice on a plate; it got smaller until gone. When it disappeared from view, the particles...
- Marcus placed a small piece of dry ice on a plate. It got smaller and smaller, and no liquid puddle formed; later, it was gone from view. When the dry ice disappeared, the particles...
- A forest fire (biosphere) produces smoke that fills the air (atmosphere). In this example, the biosphere causes what effect?
- In the model, rainwater flows downhill and erodes soil; how do hydrosphere and geosphere interact?
- Material X was shiny, hard, heavy, magnetic, and sank in water. What properties were observed about Material X?