Practice Test 2 - 1st Grade Science
20 questions. Answer them in any order, then submit to see your score and every explanation.
- A fish has gills. How do gills help the fish breathe?
- Read how Sofia improved her flag signals. Original: wave meant "can play?", hold up meant "yes," down meant "no." Test showed the flags did not work at night because it was too dark to see. She taped glow sticks to both flags and tested again at night. Her friend saw the glowing wave. Why did Sofia add glow sticks?
- Yuki noticed sunlight moved to different classroom windows. What does this show about the sun?
- Read the plan. What should Carlos do first? QUESTION: Can we make sound by making things vibrate? MATERIALS: ruler, desk STEPS: 1) Put the ruler on the desk edge. 2) Hold it, push down the end, let go. 3) Watch the ruler and listen. OBSERVE: Does it shake? Do you hear sound? RESULT: The ruler moves fast and makes a buzzing sound.
- Look at Emma's chart. Which features are the same?
Feature Mother Turtle Baby Turtles Same? Shell Hard shell Hard shell Yes Flippers Four flippers Four flippers Yes Color Green Green Yes Movement Swims Swims Yes Breathing Breathes air Breathes air Yes - Read about these animals. What pattern do you see? Animal | Parent behavior | Baby behavior Bear | Shows safe berries | Cubs watch and copy Otter | Shows cracking shells | Baby practices Cheetah | Brings live prey | Cubs try to catch
- Read about Emma's problem. Ducks stay dry with feathers. How could Emma copy ducks to stay dry?
- Read how Jamal improved his dinner bell. Original device: 2 rings meant 5 minutes, 3 rings meant now. Test showed Jamal did not hear it when his door was closed because the door blocked sound. Jamal moved the bell to the stairway. New test: door closed, 3 rings, Jamal heard it. What problem did Jamal solve by improving the device?
- Carlos made a pencil box, but the pencils kept sliding and poking out. He changed his design and added a tight strap across the top. The strap makes a narrow space that presses down on the pencils. Carlos points and says, "This strap makes a skinny space." He says, "The skinny space holds the pencils down." He adds, "That helps so the pencils don't fall out in my backpack." He turns the box upside down to show they stay in. His teacher says, "You changed the shape to fix the problem." What reasoning does Carlos give for why the narrow space helps?
- Read about penguins: dad keeps egg warm. How does this help the baby survive?
- A duck has webbed feet. How do webbed feet help it survive?
- Read about Sofia's design. What part of nature inspired it?
- In July, the sun comes up before breakfast. In January, the sun comes up after breakfast. When is sunrise earlier?
- In winter, Jamal eats dinner when it is dark. In summer, he eats dinner when it is still light. Which is true?
- Read about Keisha. The power went out, and the kitchen was dark. She could not see the apples on the counter. When a candle was lit, she could see them. When could Keisha see the apples?
- In the classroom, Jamal and Maya look at backpacks on hooks. They observe some backpacks fall off the hooks. They count 4 backpacks on the floor after 5 minutes. They ask, "Why did it fall?" One student says, "The hook is too small." Another says, "My backpack strap slips." They define: "The problem is backpack straps slip off small hooks and fall." A new object could hold straps better. Based on their observations, what is the problem?
- Sofia tested light twice: clear plastic, glass, clear ruler let light through; tissue, wax paper, thin paper let some through; book, cardboard, wood blocked. What pattern did Sofia find?
- Chen checked the moon at 8 pm: Mon left sky; Tue middle; Wed right; Thu farther right. Based on the pattern, where will it be Friday?
- Read Jamal's bell tests. When should Jamal use this device? Test 1: door open—SUCCESS. Test 2: door open—SUCCESS. Test 3: door closed—FAILED. Test 4: door cracked—SUCCESS.
- Marcus saw the moon near his roof on Wednesday, then above it on Thursday. What pattern?