3 rd Grade Science Review Carolina Fleming

Steps to the Scientific Method

Question Hypothesis Experiment Observation Conclusion

Question Hypothesis Experiment Observation Conclusion 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 Chains

Producers - plants Producers - plants Consumers- Consumers- Herbivores eat only plants Carnivores eat only meats Omnivores eat both plants and meat Decomposers Decomposers

Complete the Food Chain Click here!!

Soil

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 sandclaysand + rocks clay ++ sand + humus =SOIL

Topsoil Ground level Subsoil Bedrock

Water Cycle

*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: E vaporation C ondensation P recipitation C ollection E-C-P-C

Evaporation Condensation Precipitation Collection