Practice Test 6 - 4th Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- Sofia looks at a painting in sunlight through a window. How does light allow her to see it?
- For a fish, what is the function of the swim bladder inside its body?
- Maya's region is in drought, and water shortages hurt farms and families; what could the community do?
- Following the arrows, what happens immediately after the dog's ears detect Jamal's "sit" command?
- Jamal released a pendulum ball from 20 cm high into two hanging balls. After the hit, one ball on the other side swung up to 18 cm. How do the observations show that energy was transferred during the collision?
- Keisha rides her bike at medium speed, then will slow down near a stop sign; kinetic energy will ___.
- Emma's coastal community gets hurricanes that bring strong winds and storm surge, causing injuries and power outages. To protect people from hurricanes, what could the community do?
- Carlos plays music from a small speaker on a table. He can hear the music across the room, but it is quieter when he steps into the hallway. In this observation, which type of energy is being transferred?
- Yuki looks at a pencil on her desk when a lamp is on. What allows Yuki to see the pencil?
- Keisha's article explains: coal is burned to make electricity, and oil is refined into gasoline for cars. Based on this information, which resource is used to make electricity?
- Jamal turns on a flashlight and points it at a wall; the wall becomes bright. In this observation, which type of energy is being transferred?
- Amir's notes say natural gas is extracted, sent through pipes, and burned for heat in buildings. Based on this information, how do humans use natural gas for energy?
- Looking at this map, where are most volcanoes located compared to plate boundary lines?
- In this situation, Chen puts a coin inside a closed box under a lamp. Will the coin be visible, and why?
- A coastal town prepares for hurricanes. Solution A installs storm shutters, which protect windows well but can be costly. Solution B creates an evacuation plan with practice drills, which is low cost and quick, but it does not protect property. Solution C builds a community shelter, which protects many people but takes time and money to build. Using the criterion of time to implement quickly, which solution should be selected?
- Amir pushed a swing gently and it reached 1 meter high; after pumping his legs, it reached 3 meters high and moved faster. Based on observations, how did his kinetic energy change when speed increased? Use evidence.
- Which describes how erosion along a riverbank can affect humans living nearby?
- When a landslide happens on a steep hill, what impact can it have on a road?
- Diego observes desert rocks with small holes and smooth sides where sand hits them. How has weathering changed the rock over time?
- Based on these scenarios, which example shows energy transfer by light?