Grade 2 Science | Student Workbook Unit 1

SCIENCE STUDENT PDF: Download the Science-only fillable workbook. Science lessons, observations and questions follow on this page. Record actual measurements honestly, and save the PDF in your own app. This is Unit 1, not a full annual Science course.

Lesson 1: Life cycles and evidence

Science Lesson

Direct teaching: Many organisms have recognizable stages in their life cycle. A flowering plant may develop from seed to seedling, mature plant, and seed-producing stage. The duration and details vary by species.

Check your work: explain at least one answer using a drawing, calculation, exact passage, or evidence. If a task is too easy, try unfamiliar higher-level work rather than repeating memorized facts.

Science Practice: 8 Assignments

1. Draw a seed, seedling, mature plant, and new seeds in order.
2. Define life cycle in your own words.
3. State two needs of a seedling.
4. Explain why a rock has no biological life cycle.
5. Write one observable change in plant growth.
6. Describe how you would measure plant height.
7. Name a condition you would keep the same when comparing plants.
8. Explain what information a single measurement cannot tell you.

Observe and Explain

Separate observations from hypotheses and illustrations from measured results. Never invent experimental data. Use safe materials and adult guidance where needed.

Advanced Science Extension

Form a measurable question about this lesson, describe a fair comparison and identify at least one limitation. This challenge is available at any age when prerequisites are mastered.

Print and Navigate

Copy the lesson or print this webpage. Return to Grade 2 subjects.

Grade 2 | Five-Day Science Investigation Extension

Original unit extension: five short lessons with direct teaching, safe observations, inquiry questions, and an independent check. This is not an entire science year. Adult supervision is needed for all hands-on activities.

Day 1: Plant Life Cycles

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A flowering plant can move through seed, germination, seedling, mature plant, flowers, and new seeds. Draw arrows to show the sequence. Different species may reproduce and develop differently.

• 1. Put seed, adult plant, seedling, new seed in a sensible cycle.
• 2. What begins to grow during germination?
• 3. Why is a life cycle described as a cycle?
• 4. Describe one variation you might observe between plant kinds.

Keep a dated record or drawing. Do not invent data. A learner may respond orally when appropriate.

Day 2: Variables and Growth

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When comparing seedlings, choose a measurement such as height in centimeters, collect it at regular intervals, and keep other conditions as similar as possible. Record data even if the result differs from your prediction.

• 1. Identify a measurable plant-growth variable.
• 2. Write a height table heading with units.
• 3. Name one controlled condition.
• 4. Why is a prediction not the same as data?

Keep a dated record or drawing. Do not invent data. A learner may respond orally when appropriate.

Day 3: Habitats and Living Requirements

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A habitat supplies resources, but organisms in different habitats have different adaptations. Frogs may use aquatic and land habitats during their life cycle. Avoid claiming all animals follow identical stages.

• 1. Name a pond organism.
• 2. List two resources it may need.
• 3. How can a dry habitat challenge an aquatic organism?
• 4. Give one example of different life stages using different habitats.

Keep a dated record or drawing. Do not invent data. A learner may respond orally when appropriate.

Day 4: Evidence and Explanation

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An observation is a measurement or description made directly. An inference is an explanation supported by evidence. If a seedling is 2 cm taller after a week, growth was observed. The reason for that growth requires more evidence.

• 1. What was measured if height rose from 7 cm to 9 cm?
• 2. How much did height increase?
• 3. Does this prove extra light caused the increase?
• 4. What additional records would help explain the change?

Keep a dated record or drawing. Do not invent data. A learner may respond orally when appropriate.

Day 5: Independent Science Check

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Answer using the new scenario without copying earlier work. A teacher may clarify vocabulary but should record prompting.

• 1. What stage follows a germinating seed?
• 2. Name one controlled variable in a plant comparison.
• 3. A plant grew from 5 to 8 cm. How many centimeters taller?
• 4. Why might measuring only once be insufficient?

Keep a dated record or drawing. Do not invent data. A learner may respond orally when appropriate.

Spiral Review and Extension

Before each new lesson, revisit two earlier concepts with unfamiliar objects. Advanced students may design a comparison, identify controls, and explain what evidence would be needed to support a conclusion.

Grade 2 Science Unit 1: Expanded Student Textbook

Read this original five-day science student textbook before completing the corresponding daily workbook PDFs. The teacher answer guide is separate. This text is Unit 1, not the complete year-long textbook.

Student Textbook Day 1: Plant Life Cycles

Read and Understand

Many flowering plants grow from seeds through seedling and mature stages. Flowers can produce new seeds, allowing the cycle to begin again.

Worked Example and Guided Practice

Draw the sequence with arrows and label every stage.

After reading, complete the Day 1 downloadable workbook questions independently.

Student Textbook Day 2: Variables and Growth

Read and Understand

A variable can change during a test. To study plant growth, identify what is changed, what is measured and what conditions should stay alike.

Worked Example and Guided Practice

Name the changed variable when investigating watering amount and plant height.

After reading, complete the Day 2 downloadable workbook questions independently.

Student Textbook Day 3: Habitats and Living Requirements

Read and Understand

Different habitats supply water, light, food and shelter in different ways. Organisms depend on conditions appropriate to their needs.

Worked Example and Guided Practice

Compare a pond and dry field, identifying two resource differences.

After reading, complete the Day 3 downloadable workbook questions independently.

Student Textbook Day 4: Evidence and Explanation

Read and Understand

If a plant grew from 5 cm to 8 cm, it increased by 3 cm. The measurements show a change but do not automatically identify its cause.

Worked Example and Guided Practice

Interpret a two-date sample table and label hypothetical measurements correctly.

After reading, complete the Day 4 downloadable workbook questions independently.

Student Textbook Day 5: Independent Science Check

Read and Understand

Review plant life cycles, fair tests and living requirements. State evidence and distinguish it from a possible explanation.

Worked Example and Guided Practice

Interpret unfamiliar plant growth data without using the parent answer guide.

After reading, complete the Day 5 downloadable workbook questions independently.

Unit Review

Review all five lessons with new examples. Record evidence and measurements accurately, distinguish observations from interpretations, and discuss errors with a teacher.