Ask a testable question or define a problem with a clear purpose.
二年级 科学 练习单
6 份原创资源。请根据下方学习目标选择，并非覆盖完整课程。原版 PDF 可免费用于课堂和家庭；支持定制的活动还可以调整。
科学 知识图谱
每个想法都有成长的空间。
Explore phenomena through connected concepts, investigation and design. Each topic distinguishes what to observe from what a model can explain.
14 个独立 个目标 · 1 有关联活动
关联活动 暂无活动NGSS elementary grades are preserved. Middle/high-school topics belong to bands, not fixed biology/chemistry/physics years. Shared topics appear throughout their source band.
触控板：双指横滑 · 鼠标：拖动或 Shift＋滚轮
知识相互连接
跨学习背景 →
跨学习背景 →
二年级检查来源范围与学习准备程度
物质、运动与能量1 个独立目标
生命与生命系统2 个独立目标
地球系统与人类1 个独立目标
空间与地球历史1 个独立目标
工程设计1 个独立目标
探究与推理8 个独立目标
贯穿图谱的实践与维度15 个框架视角
Use and revise representations, stating what they include and omit.
Plan comparisons, select measurements and consider sources of variation.
Look for patterns while distinguishing measurement from interpretation.
Use quantities, units, graphs and computation to investigate a phenomenon.
Connect evidence to a mechanism or evaluate a design against criteria.
Compare explanations and claims using evidence and reasoning.
Evaluate sources and communicate methods, evidence and limitations.
Use patterns as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
Use cause & effect as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
Use scale, proportion & quantity as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
Use systems & system models as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
Use energy & matter as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
Use structure & function as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
Use stability & change as a reasoning lens across phenomena; connect it to a specific concept and practice rather than teaching it only as vocabulary.
图谱覆盖范围 · 来源与资源缺口
Every unique DCI bundle in the official NGSS index has an original outline, alongside preschool inquiry, all eight practices and seven crosscutting concepts.
- This is a DCI-bundle knowledge inventory, not a completed item-by-item transcription of NGSS performance expectations or evidence statements.
- Many lessons need direct observation, materials, measurement or discussion; a printed sheet alone cannot supply every dimension.
- Advanced course detail such as AP chemistry, anatomy and astronomy is outside the current core inventory.
103 个独立目标 · 18 个有关联单元 · 85 个暂无关联单元。共同目标可能出现在多个年级，但仅计数一次。
Next Generation Science Standards (2013) ↗
All DCI bundles in the official index; original topic outlines. Individual performance expectations, assessment boundaries and evidence statements must be consulted at source.
Head Start Early Learning Outcomes Framework (2015) ↗
Preschool developmental reference. Not a readiness test or an exhaustive checklist.
MakeWorksheet authored knowledge sequence ↗
Original topics, observation prompts, reference grade positions and activity associations. These are planning choices, not official nationwide requirements.
导航标签、教学纲要、观察提示和活动关联由 MakeWorksheet 编写。来源核查日期： 2026-10-04.
此合集中的技能
- Matter and Changes of State — Distinguish familiar states of matter and describe selected changes.
- Matter and Changes of State: Apply and Create — Distinguish familiar states of matter and describe selected changes.
- Matter and Changes of State: Explore and Explain — Distinguish familiar states of matter and describe selected changes.
- Matter and Changes of State: Practice Independently — Distinguish familiar states of matter and describe selected changes.
- Three States of Matter: Solid, Liquid, or Gas? — Differentiate the three common states of matter: solid, liquid, and gas
- Human Body: The Five Senses and Sensory Organs — Identify the five human senses: Sight, Hearing, Smell, Taste, and Touch
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