2.1 A: (1) Scientific investigation and
reasoning. The student conducts
classroom and outdoor investigations
following home and school safety
procedures. The student is expected to:
(A) identify and demonstrate safe
practices as described in the Texas Safety
Standards during classroom and outdoor
investigations, including wearing safety
goggles, washing hands, and using
materials appropriately;
2.2 A, C, D, E, F: (2) Scientific investigation
and reasoning. The student develops
abilities necessary to do scientific inquiry
in classroom and outdoor investigations.
The student is expected to: (A) ask
questions about organisms, objects, and
events during observations and
investigations; (C) collect data from
observations using simple equipment such
as hand lenses, primary balances,
thermometers, and non-standard
measurement tools; (D) record and
organize data using pictures, numbers,
and words; (E) communicate observations
and justify explanations using student-
generated data from simple descriptive
investigations; and (F) compare results of
scientists know about the world.
2.4 A, B: (4) Scientific investigation and
reasoning. The student uses age-
appropriate tools and models to
investigate the natural world. The student
is expected to: (A) collect, record, and
compare information using tools,
including computers, hand lenses, rulers,
primary balances, plastic beakers,
magnets, collecting nets, notebooks, and
safety goggles; timing devices, including
clocks and stopwatches; weather
instruments such as thermometers, wind
vanes, and rain gauges; and materials to
support observations of habitats of
organisms such as terrariums and
aquariums; and (B) measure and compare
organisms and objects using non-standard
units that approximate metric units.
2.5 A-D: (5) Matter and energy. The
student knows that matter has physical
properties and those properties
determine how it is described, classified,
changed, and used. The student is
expected to: (A) classify matter by
physical properties, including shape,
relative mass, relative temperature,
texture, flexibility, and whether material is
a solid or liquid; (B) compare changes in
materials caused by heating and cooling;
(C) demonstrate that things can be done
properties such as cutting, folding,
sanding, and melting; and (D) combine
materials that when put together can do
things that they cannot do by themselves
such as building a tower or a bridge and
justify the selection of those materials
based on their physical properties.