3rd Grade Science Review

Carolina Fleming

Steps to the Scientific Method

QuestionHypothesisExperimentObservationConclusion

QuestionHypothesisExperimentObservationConclusion

Quiet Hippos Eat Only Carrots!

Six

Simple

Machines

Lever

A straight rod or board that pivots on a fulcrum

Pulley

Wheel with a rope used to pull load up or down

Inclined Plane

A sloping surface, such as a ramp

Wedge

Two inclined planes joined back to back-used to cut

Screw

An inclined plane wrapped around an axle

Wheel & Axle

Wheel fastened to an axle that turn

together

Food Food ChainsChains

Producers - plantsProducers - plants Consumers- Consumers-

Herbivores Herbivores eat only plants eat only plants

CarnivoresCarnivores eat only meats eat only meats

OmnivoresOmnivores eat both plants eat both plants

and meatand meat DecomposersDecomposers

Complete the Food ChainComplete the Food Chain

Click here!!

SoilSoil

provides the support and nutrients necessary for plant growth

Soil…

is a natural resource that should be conserved.

Help take care of our Earth!

Soil is composed of rocks, clay, silt, sand and humus

larger than clay but smaller than a sand

+rocks clay

++

sand

+humus

= SOIL

Topsoil

Ground level

Subsoil

Bedrock

WateWater r

CycleCycle

*The water cycle never stops! *It is driven by the power

of the SUN

*Water is essential for all living things!

There are 4 steps:

Evaporation

Condensation PrecipitationCollection

E-C-P-C

Evaporation

Condensation

PrecipitationCollection