Lesson 2

Do plants get their food molecules by taking them in?

Lesson Objectives...

Plan and carry out an investigation collaboratively by identifying controls to produce data as evidence to determine whether hydroponic plant food contains food molecules as inputs.
Engage in argument from evidence to support or refute possible inputs of where plants get their food molecules from, such as hydroponic plant food or soil.

Lesson 2 - Science Notebook - Matter Cycling & Photosynthesis Unit

Resources for Lesson 2...

MC - Lesson 2 - Slides

Slide Presentation for Lesson 2...

This is the slide presentation used by your teachers when navigating through Lesson 2.

Exploring Plants Growing in Class...

Hydroponic Plant System...

MC - Lesson 2 - Details of the Hydroponic Plant System

What are food molecules made of?

Investigating Hydroponic Plant Food as a Candidate...

Designing and Carrying Out Our Investigation...

MC - Lesson 2 - Lab Experiment Using Food Indicators to Test Hydroponic Plant Food

Investigation Hydroponic Plant Food...

Distilled Water...

Testing Distilled Water as a Control. What do we know about distilled water? Are food molecules present?

Hydroponic Plant Food...

Testing Hydroponic Plant Food for Food Molecules. What do we know about hydroponic plant food? Are food molecules present?

The Results of Our Investigation...

Distilled water is used as a control because we know it does not have any food molecules in it. These are the results with each of the tests for food molecules. Remember Benedict's Solution is used to test for glucose, iodine solution is used to test for starch (complex carbohydrates), Biuret's Solution is used to proteins, and a brown paper bag is used to test for fats.

Distilled Water Results...

Hydroponic Plant Food Results...

Investigating Other Foods for Food Molecules...

The Results of Our Investigation...

These are the results with each of the foods we tested for food molecules. Remember Benedict's Solution is used to test for glucose, iodine solution is used to test for starch (complex carbohydrates), Biuret's Solution is used to proteins, and a brown paper bag is used to test for fats.

Chickpea Results...

Cheezits Results...

Olive Oil Results...

Scrambled Eggs Results...

What we figured out this lesson...

Plants can grow without soil.
Water and hydroponic plant food (HPF) do not have food molecules inside them according to food labels and food indicator experimental results.
Parts of food molecules might be found in water and hydroponic plant food.

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