Kindergarten Science | Chapter 6: Objects, Materials and Safe Investigations
Student reading edition. Read the full lesson with an adult, study the example, then complete independent practice. Five daily lessons in one chapter, not a full 36-week textbook.
Day 1: Observe Materials
Read and understand
Objects can be made of wood, metal, paper, plastic, cloth or other materials. Look closely at texture, shape and color. Some objects feel smooth, rough, flexible or rigid. Use only safe classroom items. Describe what you actually observe rather than guessing what an unseen object is made of.
Worked example
Compare a paper sheet and wooden block: paper is easy to bend; the block usually keeps its shape. Both are solid classroom objects.
Oral practice preview
- Name a material used to make a book page.
- Name something often made of metal.
After reading, complete Chapter 6 Day 1 in the separate practice book.
Day 2: Sort by a Rule
Read and understand
Scientists sort objects into groups to describe similarities and differences. State the rule first. You might group objects by whether they bend, or by their material. A good rule can be followed by someone else. If an object fits both groups, explain why the rule needs improving.
Worked example
Sort a paper sheet, wooden block and cloth by bendability. Paper and cloth bend; the sturdy wooden block usually bends much less.
Oral practice preview
- What is a sorting rule?
- Name a property that can be used to sort.
After reading, complete Chapter 6 Day 2 in the separate practice book.
Day 3: Predict and Test Whether Objects Sink or Float
Read and understand
Some objects float and some sink when placed in water. Whether an object floats depends on the object and the liquid, including shape and materials. With adult supervision, use a shallow bowl and safe objects that will not damage electronics or dissolve dangerously. Predict first, then observe. Do not change your written prediction after seeing the result.
Worked example
A clean plastic bottle cap may float in water, but it must be tested rather than assumed. Write ‘prediction’ before and ‘observed result’ afterward.
Oral practice preview
- What does float mean?
- What does sink mean?
After reading, complete Chapter 6 Day 3 in the separate practice book.
Day 4: Make a Fair Comparison
Read and understand
A fair comparison keeps important conditions the same. If testing two objects in water, use the same container, amount of water, and method. Only record results actually seen. Repeat observations when needed, and never claim every object of one material behaves identically in every shape.
Worked example
Place two teacher-approved objects one at a time into the same bowl of water. Observe whether each floats or sinks. Do not invent results for an experiment not conducted.
Oral practice preview
- Why use the same bowl for two comparisons?
- Should objects be dropped from very different heights?
After reading, complete Chapter 6 Day 4 in the separate practice book.
Day 5: Independent Materials and Evidence Check
Read and understand
Describe a material, choose a sorting rule and distinguish a prediction from a real observation. Explain which steps made the test safe and repeatable. Draw a labeled diagram if that is easier than writing a long explanation.
Worked example
Claim: a tested cap floated. Evidence: the cap stayed on the surface during the observed test. The claim must not be written if no test was made.
Oral practice preview
- Name two common materials.
- What is a property used for sorting?
After reading, complete Chapter 6 Day 5 in the separate practice book.
Chapter review and progression
Review key vocabulary and explain an example from each lesson before moving on.