SUMMARIES OF SCIENCE TOPICS

SUMMARY 1

Energy resources

There are different energy resources, that use at home, for example;  electricity that comes plant is use enery from burning fuels as coal, oil, and natural gas.

Alternative energy resources:  wind

                                                       Water

                                                       Solar

                                                      geothermal

Other Energy resources is that obtain from a fossil fuel.  In it the heat from burning fossil fuels can used durctly homes, schools, business and factories.

Advantage: Has a lot of energy

Diadvantage:  this energy are not renewable and gives off smoke and gases.

Alternative energy sources:

1. Modern waterwheels

2. Harnessing the Wind

3. Earth furnace

4.Tapping the tide.

Summary 2

Living Things and their environment

Biotic factor                                                                                      Abiotic factor

Living things                                                                                     Non-living things

                                                                                                          Soil

                                                                                                          Water

                                                                                                           Air

                                                                                                           Temperature

                                                                                                           Light

Ecosystem      

                                      

Algae

Animals

Plants

Fungi

Bacteria

Ecosystem:All the living and non-living things in an area interacting with each other.

Summary 3

FOOD WEB                                                                       FOOD  CHAIN                                                                                                            

THE OVERLAPPING FOOD CHAINS                                    THE PATH OF ENERGY IN FOOD

IN A COMMUNITY.

                                                                                  

FOOD CHAINS COMES OF FIRST WITH SUN.

FOOD WEB COMES WITH FIRST WITH CONSUMERS AND PRODUCERS.