Practice Test 4 - 4th Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- Diego's town plans tornado safety. Solution A: underground shelter (very safe, expensive, hard for some to access). Solution B: safe room in a home (very safe, medium-high cost, only that family). Solution C: community storm shelter (safe, shared cost, may be farther). Based on coverage for the most people, which solution is best?
- Looking at the wave diagram, what is the distance from one crest to the next crest called?
- Amir talks on a corded phone: voice → phone changes to electric signal → wires → other phone → sound to Yuki's ear. What is the pathway?
- The same cold wind blows; a bird flies south, a bear hibernates, and a rabbit grows thicker fur. Why?
- What is the pathway from seeing a mouse to a cat pouncing on it?
- Amir cranks a hand-crank flashlight, and it shines. This device converts energy from ___ to ___.
- A tree has a trunk, a human has a skeleton, and a sunflower has a stem. How can different structures accomplish the same function?
- When gasoline made from oil is burned in cars, which environmental impact results?
- Maya's town gets spring floods. Solution A: build a levee to block river water (very effective, very expensive, years). Solution B: elevate homes on stilts (effective for those homes, medium cost, months). Solution C: create wetlands buffer (somewhat effective, lower cost, needs space and time). Based on effectiveness for protecting the whole town, which solution is best?
- In what order does information flow when a bird sees a hawk and flies away?
- Yuki plays a guitar: string vibrates → sound through air → hits drum → drum vibrates. What is the pathway of energy transfer from start to finish?
- For this design challenge, Keisha will build a toy car that moves using a small motor. The device must convert electrical energy from a battery into motion energy that turns the wheels. She may use a battery pack, motor, wheels, and wires, and it must roll at least 1 meter. Which design would best solve this problem?
- Given these conditions, Fatima points the lamp at the poster; can she see it, and why?
- Chen draws a wave with crests 10 cm apart and height 1 cm. Which statement best describes it?
- Looking at the island map, what pattern do the islands (●) make from northwest to southeast?
- Maya claps her hands once in the gym. Students nearby hear a loud clap, and students farther away hear a softer clap. This scenario shows energy transfer by ___
- Looking at these rock layers, what evidence shows a time gap from erosion?
- In class, Chen rolls a bowling ball toward pins standing still, then watches the hit. Which question asks about energy changes in this collision?
- Yuki built a sound-making device that converts electrical energy to sound using a small speaker. In tests, it played a tone, but it was very quiet from 3 meters away; the goal was to hear it clearly. The battery was new, but one wire connection kept loosening. Based on the test, what change would help it be louder?
- On this map, which feature is the coastline shown by the land meeting the ocean?