Practice Test 1 - 4th Grade Science

20 questions. Answer them in any order, then submit to see your score and every explanation.

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1. Hillside Heights is built on steep slopes, and heavy rain sometimes causes landslides. Mud can cover roads, damage homes, and force families to leave. The community cannot stop rain, but it can reduce landslide impacts. What solution could reduce the risk from landslides in this area?
2. How do droughts create challenges for humans who live in farming areas like Amir's?
3. Looking at this map, where are most volcano symbols located compared to the Pacific Ocean?
4. Looking at these rock layers, what pattern best shows deposition happened over a long time?​​
5. Carlos reads that natural gas can be burned for cooking and heating in homes. Based on this information, how do humans use natural gas for energy?​​​
6. On a snowy hill, Diego's sled zips down and reaches the bottom first, while Emma's sled goes slowly and reaches last. Which sled has more kinetic energy while moving?
7. Marcus turns on a desk lamp and aims it at his book. The pages become easy to see, and the light makes a clear circle on the paper. Based on what happened, what type of energy is being transferred?
8. A sled starts slow at the top, then will speed up going downhill; kinetic energy will ___.
9. Fatima tested a water heating device that uses a lamp to change light energy into heat. After 10 minutes, the water temperature rose from $20^ $ to $28^ $, but the goal was $40^ $. She noticed the cup felt cool and air moved around it. The test suggests heat is escaping to the air. Based on the results, what refinement would help meet the goal?
10. During soccer practice, Amir kicks one ball that zooms across the grass, and Maya kicks another that rolls slowly. Based on their speeds, which ball has more kinetic energy (energy of motion)?
11. Sofia places a tiny paper square in front of a speaker. When the music gets loud, the paper starts to shake. Which explains why the paper moves?
12. A hurricane is expected soon near Keisha's town. Solution A: storm shutters (protects windows, but takes time and money). Solution B: evacuation plan (quick, low cost, helps people get to safety). Solution C: community shelter (very safe, but expensive and not finished yet). Based on time to prepare before this storm, which solution is best?​
13. How is erosion changing the landscape when rain makes channels down a hill?
14. Jamal's toy car traveled $2\ \text{m}$ in $2\ \text{s}$ toward a still car; after the crash, the first car rolled $0.5\ \text{m}$ and the second rolled $1.2\ \text{m}$. What evidence shows that energy transferred from one car to the other?
15. Toy cars test: Emma rolled Car A 40 cm in 2 s into still Car B; after, A rolled 10 cm and B rolled 25 cm. Based on these observations, how was energy transferred in this collision?
16. A hummingbird uses a long beak, and a butterfly uses a proboscis to drink nectar. How are these structures similar in function?
17. Yuki stands in front of a mirror; a lit lamp is behind her—can she see it in the mirror?
18. In a flower, what is the function of petals for reproduction?
19. Yuki plays a guitar near a drum: first the guitar string vibrates, then sound travels through air, next it hits the drum, and finally the drum vibrates. Based on the pathway described, where does the energy start?
20. Yuki is pushing a wagon that is moving slowly with low kinetic energy. She will push harder and the wagon will speed up. When the wagon speeds up, its kinetic energy will ___.

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