📖

Variables: What Changes?

Scientific Investigation Skills

Day 142of 180
Week 29of 36
40Minutes
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🖨️ Download Worksheet (PDF)
🎯 What You'll Learn

Learning Objectives

1

Identify independent, dependent, and controlled variables in scientific experiments

2

Design a simple experiment with clear variable distinctions

3

Understand the importance of fair testing in scientific investigations

📖 Scripture Connection

Proverbs 2:6

“For Yahweh gives wisdom. Out of his mouth comes knowledge and understanding.”

— Proverbs 2:6 (WEB)

Just as scientific investigation requires careful observation and understanding, wisdom comes from carefully seeking knowledge from God

📦 Materials Needed

  • 3 identical clear plastic cups
  • Measuring spoon
  • Liquid plant fertilizer
  • Water
  • 3 small bean seeds
  • Soil
  • Permanent marker
  • Ruler
  • Science journal
  • Pencil
📚 Step-by-Step

Lesson Plan

1Opening (5 min)

BibleMouse science explorers, today we'll learn how scientists carefully design experiments by understanding variables!

💭 Review Question: What did we learn yesterday about asking good scientific questions?
2Teaching (12 min)

Variables are the parts of an experiment that can change. Some variables we control, some we measure, and some we intentionally change.

📌 Key Talking Points:
  • Independent Variable: The part YOU change on purpose
  • Dependent Variable: The part YOU MEASURE
  • Controlled Variables: Everything else that stays the same
💬 Discussion Questions:
  • Can you think of an experiment where we might change something?
  • Why is it important to keep most things the same in a scientific test?
3Activity: Seed Growth Experiment (18 min)
hands-on

Design an experiment to test how fertilizer affects seed growth

📝 Instructions:
  1. Label 3 cups: 'No Fertilizer', '1/2 Spoon Fertilizer', '1 Spoon Fertilizer'
  2. Put equal amounts of soil in each cup
  3. Plant one seed in each cup
  4. Independent Variable: Amount of fertilizer
  5. Dependent Variable: Seed growth height
  6. Controlled Variables: Soil type, water amount, sunlight
🔄 Variations:

Simpler: Use fewer fertilizer amounts

Challenge: Track additional growth measurements like leaf count

4Closing (5 min)

Today we learned how scientists carefully design experiments by understanding variables

📝 Review Questions:
  • What are the three types of variables?
  • Why do scientists try to keep most things the same?

Coming up: Tomorrow we'll learn how to plan our own scientific investigations!

👨‍👩‍👧 For Parents

Teaching Notes

📚 Background:

Fourth graders are developing abstract thinking about experimental design

💡 Teaching Tips:
  • Use lots of visual demonstrations
  • Encourage hands-on exploration
  • Connect scientific thinking to biblical wisdom
🤔 Common Struggles:

Children might mix up variable types or struggle with abstract concepts

👀 Signs of Understanding:

Clear understanding of changing vs. measuring vs. controlling experiment elements

🚀 Want More?

Extension Activities

  • Create a poster explaining the three variable types
  • Design additional seed growth experiments with different variables

Ready for Tomorrow?

Great job completing today's lesson!

Continue to Day 143 →Back to Science