Practice Test 3 - 4th Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- Given a closed shoe box, Sofia puts a coin inside; can she see it, and why?
- Maya's wagon is still, then she will push it to move; what happens to kinetic energy?
- Chen reads by sunlight: Sun → through window → hits book → bounces to his eyes. Trace the energy pathway in order.
- Which correctly describes the light path shown when Amir sees a tree in sunlight?
- After a cat sees a mouse, what does the brain do before the cat pounces?
- During a running game, Sofia is sprinting fast, Amir is jogging, and Emma is walking slowly. Based on their speeds, who has the least kinetic energy (energy of motion)?
- Chen studies climate impacts; compared to solar, which energy source releases more greenhouse gases?
- Diego uses solar lights: first sunlight hits a solar panel, then the panel makes electric energy, next it charges a battery, and finally an LED light turns on. Trace the energy: what is the correct order of steps?
- Emma turns on a flashlight (source) and points it at a wall (destination). She sees a bright circle on the wall, and the wall looks lit up. When she moves the flashlight farther away, the circle gets bigger and dimmer. When she covers the flashlight with her hand, the circle disappears. In this observation, which type of energy is being transferred?
- Two rope waves are shown; which wave has the higher amplitude?
- Fatima's river town floods every few years, and last time the water ruined furniture and closed the main road for days. Families needed help getting to higher ground safely. The town wants a solution that is safe and practical. For this flood problem, how could the community prepare for or respond to flooding?
- Maya puts a metal spoon in warm soup, and the spoon handle feels warmer later. In this observation, what evidence shows that energy is being transferred?
- Diego swung gently and reached 1 m high. After pumping his legs, he reached 3 m high and moved faster at the bottom. Based on the observations, what happened to Diego's kinetic energy when his speed increased? Use evidence.
- In Amir's region, a long drought means little rain, low rivers, and not enough water for farms and homes. Crops fail and some businesses close because water is limited. The community cannot make it rain, but it can reduce impacts. How could the community prepare for or respond to drought?
- In this situation, Jamal is in a dark room with a toy car; flashlight is off. Will he see it, and why?
- This scenario shows Carlos cooking: stove burner → pot → water → steam. What is the pathway of energy transfer from start to finish?
- Comparing coal electricity and solar electricity, which choice creates more waste like ash?
- The evidence shows wind weathering occurred. What observations show that change over time?
- Sofia sees a wagon sitting still, and she will push it so it starts moving. When the wagon starts moving, what will happen to its kinetic energy?
- Sofia watches storm waves and calm waves hit the same beach. After 1 day of storm waves, 12 buckets of sand move; after 1 day of calm waves, 2 buckets move. When erosion rate increases, what happens to landform changes?