Practice Test 8 - 3rd Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- A swing stops after gentle s, medium s, strong s pushes. If the pattern continues, how long for a very strong push?
- Read about the test. Jamal makes a water bottle rocket and tests how much water to use. He tries 1 cup, 2 cups, and 3 cups of water, but pumps the same number of times. Sometimes the fins are crooked, and the rocket spins and crashes. Where could this design break or stop working?
- A school needs a bike rack for 20 bikes. Criteria: holds 20+ bikes, costs under $150, and is sturdy. Design A holds 20 bikes, costs $200, needs concrete, and is very sturdy. Design B holds 12 bikes, costs $80, bolts to a wall, and is sturdy if the wall is strong. Design C holds 20 bikes, costs $40, sits on the ground, but tips over when bumped. Which solution is most promising for solving this problem?
- Fern fossils were found where the land is icy and cold now. What does this fossil evidence show about the climate long ago?
- Look at the problem. In the cafeteria, trays tip and milk spills on the way to tables. Sofia says, "Use safe materials we already have and keep it small." What do students need to design to solve this problem?
- Using the evidence, which claim about retention ponds reducing flooding is most accurate?
- These six puppies are the same species; what trait shows variation among them?
- A toy car sits still on the floor. Are the forces balanced or unbalanced?
- Lion observations: prides chase away hyenas and protect cubs from males. With hunting data (40% vs 15%), which argument best shows group survival?
- In the classroom, Ms. Lee needs magnets to hold 20 art papers on a metal board. What criteria should the magnetic solution meet?
- Shell fossils were found in rock near a dry field today. Why is this evidence it was once ocean?
- Scientists found many clam and snail shell fossils in rocks far inland; what can they learn about the past environment?
- In 2015, a heat wave in an Illinois city caused 24 heat-related deaths and 89 hospital visits. In 2016 the city opened 10 cooling centers with air conditioning and free water. During a similar 2018 heat wave, 2,847 people used the centers; deaths dropped to 3 and hospital visits dropped to 47. Based on the data, which conclusion is most accurate?
- A marble takes 2 s on 1 m, 4 s on 2 m, and 6 s on 3 m. What is happening to time?
- Students roll a marble down the same ramp for five trials and record time to reach bottom to find an average. What recording method will help find patterns?
- Read about the test students are planning. Chen rolls a toy car down ramps to see if higher ramps make it roll farther. To make this a fair test, what should stay the same?
- A magnet held a paperclip chain of 3. The magnet held the first strong, the first held the second medium, and the second barely held the third. Explain why.
- In a clear lake, a school of fish swims in a tight group. When a bigger fish comes near, the whole group turns together. What group behavior do the fish show?
- Chen found a fossil cypress tree stump in a dry grassland; what was this area once like long ago?
- A wetland had standing water, fish, frogs, ducks, and cattails. When the wetland dried out, which organisms could no longer survive?