Chase Kirkpatrick February 14, 2010 Grade: 4
# of Students: # of IEP Students: # of GSSP Students: 0
Subject: Science Lesson Length: 45 min.
Unit Title: NA Lesson Title: Sink or Float? - Buoyancy
What is buoyancy? What makes an object sink or float in water? Can we predict the buoyancy
of similar/opposite objects in water?
1. Students will be able to correctly define buoyancy.
2. Students will be able to predict if an object can sink or float in water.
3. Students will observe what makes something buoyant or not.
Program of Studies: Program of Studies: Skills Related Core Content for
Understandings and Concepts Assessment
SC-4-STM-U-1 SC-4-STM-S-4 SC-04-1.1.1
Students will understand that things Students will conduct tests, compare Students will explain how matter,
can be done to materials to change data and draw conclusions about including water, can be changed
some of their properties, but not all physical properties of matter from one state to another.
materials respond the same way to including states of matter,
what is done to them. conduction and buoyancy Materials can exist in different states--
solid, liquid and gas. Some common
materials, such as water, can be
changed from one state to another by
heating or cooling. Resulting cause
and effect relationships should be
explored, described and predicted.
Objective Type of Description of Assessment Adaptations &
Assessed Assessment Accommodations
1 Formative Students will be asked several times Reminders will be
throughout the lesson what buoyancy is and given to those unable
how it applies to what they have been to recall the definition.
1, 2, 3 Formative Students will predict if something is
buoyant and if it will float or sink in water.
The students will need to give reasoning
behind their predictions.
2 Formative Students will test their predictions and
record if the objects sink or float.
2, 3 Formative Students will go back over the predictions
and make sense of why things performed as
Resources, Media and Technology
tubs for water
ping pong balls
pebble (large and small)
aluminum foil pieces
diet and regular coke
1. First we will introduce the topic of buoyancy to the students.
2. We will ask the students in groups to come up with a chart describing the objects and
predicting whether the objects we have will sink or float when placed in water and why.
3. We will then have a whole class prediction chart and have the different groups explain
using their prior knowledge about density and buoyancy to explain their predictions.
4. The different groups will test different objects and record their findings in a group chart
explaining why the objects sink or float.
5. We will come back together as a class to share what we found in the class chart and make
sure the students understand the concepts.
6. We will do a few class demonstrations of the objects and share the reasoning.
7. We will have a few extra objects that the class will have to predict and explain.
8. Students will write about their findings in the science journal.