Practice Test 5 - 1st Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- Jamal wrote: In winter the sun comes up later and goes down earlier. What does that mean about winter daylight?
- Read Amir's rabbit chart. What does it show about heredity?
- Look at Emma's flashlight code tests: 1 flash=come, 2=yes, 3=no. Plan: Can brother see and understand? Test 1: night, 1 flash—SUCCESS. Test 2: night, 2 flashes—SUCCESS. Test 3: night, 3 flashes—SUCCESS. Test 4: bright day, 1 flash—FAILED. Which test showed the device did NOT work?
- Read about Carlos's design. What problem did his design solve?
- Look at these animals. Which behavior pattern appears in many animals?
- Read Chen's tomato account. Are offspring exactly like or only similar? Chen saves seeds from one big tomato from his parent tomato plant. He grows four plants. Similarities (evidence): Evidence 1: Parent is a tomato plant. All four offspring are tomato plants. Evidence 2: Parent has compound leaves (many leaflets). All four offspring have compound leaves. Evidence 3: Parent produces tomatoes. All four offspring produce tomatoes. Evidence 4: Parent needs sun, water, and warm weather. All four offspring need the same. Evidence 5: Parent is a vine and needs support. All four offspring are vines and need staking. Differences (evidence): Evidence 1: Tomato size varies: parent 3 in; plants 2.5, 3.5, 3.0, 2.8 in. Evidence 2: Tomato number varies: parent 40; plants 35, 50, 38, 42. Evidence 3: Plant height varies: parent 5 ft; plants 4, 6, 5, 4.5 ft. Evidence 4: Ripening time varies: parent day 75; plants day 70, 80, 75, 73. Combined analysis: Offspring inherit tomato traits but vary in details. Conclusion: Offspring are like but not exactly like the parent.
- Look at Jamal's duck chart. What varies among ducklings?
- Maya says there is no place to store math tools in class. She draws a rack with 3 shelves, like three long flat lines stacked, and labels "shelves." How does the shelf shape help solve the problem?
- Chen records daylight. Summer is 15 hours, Fall is 12 hours. Which has more daylight?
- Read about Chen's sunflowers. What varies among the offspring?
- Problem: Books slid off when Maya carried them to the rug. At the building station, Maya and Chen built a tray model from a shallow box. Materials: shallow box, cardboard strips, tape. Shape features: they added raised edges on all four sides. They tested it by putting books on the tray and walking. The books stayed on the tray and did not slide off. The edges acted like walls to keep items in. The model showed the shape helps the tray work. How did the edges help when they tested it?
- Sofia watched her shadow safely, not the sun. Morning: long. Lunch: short. Afternoon: long. How does the sun's position change?
- Read about Sofia. In the dark, she could not see her toy car. When her flashlight shined, she could see it. What did Sofia need to see the car?
- A rabbit has long ears. How do ears help it stay safe?
- A woodpecker has a long, strong beak. How does its beak help it get food?
- Read about Marcus. A truck passed; the window shook. Why?
- Sofia saw the sun set at 8 pm in June and 5 pm in December. Based on the observations, why is there less daylight in December?
- Keisha saw: mirror→reflected; clear plastic→bright through; wax paper→dim through; black cloth→no light. Which materials have similar effects on light?
- Read how Chen improved his drum code. Original: 3 fast taps meant "stop." Test showed one worker near a loud saw could not hear the drum because the saw was too loud. Chen added a tall pole with a red flag and waved it with 3 taps. New test: all workers saw the red flag and stopped. What did Chen learn from testing that led to improvement?
- In the classroom, Chen and Maya notice markers roll off the table. They watch for 5 minutes during writing time. They count 7 markers that roll onto the floor. Two markers get stepped on and the tips bend. Mr. Ruiz asks them to state a clear problem. They say the table is smooth and markers do not stay put. A new tool or object could help stop the rolling. Which statement best defines the problem?