Practice Test 5 - 4th Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- To solve this challenge, what pattern system should Marcus design to show "ready," "waiting," and "done" during group work?
- Chen compares river rocks: upstream rocks are sharp, but downstream rocks are smooth. What effect has weathering had on the rocks over time?
- Maya warms her hands: campfire → heat through air → her hands feel warm. After leaving the fire, where does energy go?
- When a tsunami reaches shore, what effect can the huge waves have on people?
- Which environmental impact results from burning coal to make electricity in power plants?
- What impact does a wildfire have on people's health, homes, and daily routines?
- A river town chooses flood solutions. Solution A builds a levee to block floodwater, which can protect the whole neighborhood but is expensive and may fail if water gets too high. Solution B elevates homes, which protects only those homes and can be hard for families to afford. Solution C creates wetlands, which soak up some water and help wildlife, but needs space and may not stop the biggest floods. Comparing these solutions using the criterion of coverage for the whole community, which solution is best?
- Carlos found marine reptile fossils in lower layers, but dinosaur bone fossils in upper layers. Based on these fossils, what does the evidence suggest?
- Tracing the information flow, what is the correct order when Sofia touches a hot pan and pulls away?
- In a dark room, Jamal turns the flashlight off; will the book on the desk be visible?
- Carlos turns on a lamp, and the book page becomes easier to see. Based on what happened, how is energy moving from one place to another?
- Amir sits near a safe classroom space heater. He feels warmer when closer, and cooler when he steps farther away. In this observation, how is energy moving from one place to another?
- What does this model demonstrate about seeing objects when Yuki reads under a lamp?
- In this energy transfer, first Carlos talks into a phone, then sound becomes an electric signal in the phone, next the signal travels through wires, and finally the other phone makes sound for Keisha to hear. What is the pathway of energy transfer from start to finish?
- Comparing coal electricity and solar electricity, which choice makes more air pollution while running?
- Yuki looks at her face in a mirror with the bathroom light on. How can she see herself?
- Sofia compares coal and solar power; which is better for cleaner air in towns?
- During sunny daytime, Diego looks at the same bicycle outside; will it be visible, and why?
- In a tree, what is the function of the trunk for growth and survival?
- Carlos and Yuki must send a secret message across the classroom without the teacher noticing. Solution A uses passing a folded paper with a repeating dot pattern (one dot = A, two dots = B). Solution B uses scratching sounds (short scratch = A, long scratch = B). Criteria: secrecy and conditions (teacher may hear). Which solution would be better if the teacher is listening closely?