3200-02 Students will compare and contrast the structure of Earths
crust and interior.
OBJECTIVE 3200-0201 Construct and defend a model of Earths
crust and interior.
Intended Learning Outcomes:
1d. Make estimations and predictions based on observations and current
2c. Plan field studies, controlled experiments, and other investigations.
2g.Construct models and simulations to describe and explain natural
5c. Understand science concepts and principles.
Students are able to operate a triple beam balance scale or other scale
Students are able to read the meniscus of water in a graduated cylinder
Water has a density of 1.0 g/cm^3. Objects with a density greater than
1.0 will sink in water. Objects with a density less than 1.0 will float
density = mass
1. Students will determine the mass and volume of a given object.
2. Students will determine the density of object by mass/volume. (g/cm^3)
sure to keep all Chemical and Glassware Safety Rules that are specified
by your teacher and in all general laboratory experiences, as well as
all teacher directions.
Select one item and predict whether it will sink
or float in water.
Record your prediction.
Using the same item, determine its volume by using
a graduated cylinder and water.
Fill the cylinder to a designated amount and record
this starting point.
Gently drop in the item. Record the amount of
water that was displaced by the item.
(If the graduated cylinder is not large enough
for the selected item, set a small container in a larger pan.
Completely fill the smaller container with
Gently drop the item into the water.
Water will spill out into the larger container.
Measure this water as the amount that is displaced
Using same item, determine its mass by weighing the
item on balance scale. Record the mass.
Divide the mass by the volume to calculate the density
and record the items density.
Items having a density greater than1.0 g/cm^3 will
sink; items having a density less than 1.0 g/cm^3 (one gram per cubic
centimeter) will float.
Students place items in appropriate groups as
to whether they sink or float.
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State 7th Grade Integrated Science Core Curriculum Page.
by: Glen Westbroek
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