Activity
Demonstration with Prediction
Demonstration with Prediction
Activity Overview
Students predict outcomes before a demonstration, observe carefully, and then discuss differences between predictions and results.
Grade Levels
Subject Areas
Activity Types
Detailed Example
Sink or Float Investigation (Science - 1st Grade)
Materials Needed
- Clear container filled with water
- Collection of everyday objects (cork, marble, pencil, paper clip, plastic toy, etc.)
- Prediction recording sheets with picture supports
- Object sorting cards (sink/float categories)
- Observation magnifying glasses
- Properties vocabulary cards
- Results recording chart
- Small whiteboards for student predictions
Preparation
Fill a clear container with water and place it where all students can see. Gather a collection of 8-10 everyday objects with different properties, some that will sink and some that will float. Create prediction sheets with pictures of each object and sink/float columns. Prepare a class results chart for recording observations.
Step-by-Step Instructions
Introduction to sink and float (5-7 minutes):
Activate prior knowledge with questions about water experiences
Introduce the terms 'sink' and 'float' with simple definitions and gestures
Demonstrate with one obvious example of each (rock sinking, cork floating)
Discuss what 'prediction' means - our best guess based on what we know
Exploration of test objects (5 minutes):
Show students each test object one at a time
Allow students to examine properties like weight, material, size
Introduce vocabulary: heavy/light, large/small, solid/hollow
Place objects in a central location for reference
Making predictions (8-10 minutes):
Distribute prediction recording sheets
For each object, students predict whether it will sink or float by circling or coloring the appropriate column
Students whisper their prediction to a partner
For class engagement, students can hold up whiteboards with 'S' or 'F' predictions when prompted
Demonstration and observation (15 minutes):
One by one, test each object in the water container
Before testing, take a quick class poll of predictions
Place object gently in water and allow time for observation
Students record actual results on their sheets
Discuss: 'What happened? Did it match your prediction?'
For added engagement, select student helpers to test objects
Pattern identification (5-7 minutes):
After testing all objects, sort them into sink and float groups
Guide students to notice patterns: 'What do you notice about the objects that floated?'
Create a simple properties chart comparing the two groups
Introduce the concept that material and shape affect floating
Prediction confirmation (5 minutes):
Students count how many predictions were correct
Discuss: 'Were you surprised by any results? Which ones?'
Talk about why predictions sometimes differ from results
Extension challenge: Show students a new object and have them apply what they learned to make an evidence-based prediction.
Differentiation Strategies
For kindergarteners, simplify to fewer objects and use a thumbs up/down system for predictions instead of recording sheets. For 2nd-3rd graders, add a column for explaining reasoning behind predictions and introduce the concept of density. For English learners, provide visual supports and native language translations for key terms.
Assessment Guidelines
Review prediction sheets for completion and accuracy of recorded results. Note which students can identify patterns in floating objects. Listen for use of evidence-based reasoning during discussions. Observe whether students apply learning to the extension challenge.