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1. Directions: Complete the puzzle on page 2 using the descriptions below. Additional clues are provided
on below the puzzle. (18 items x 1 point)
Across
2. It is the acronym of a government agency
that monitors environmental issues.
4. It is an interdependent community of
organisms including plants, animals, water,
air, and the ground.
6. It is a tool used to illustrate how much
impact a human being has on the Earth.
9. These are organisms that consume carbon
dioxide, convert it to food, and produce
oxygen.
13. It is the part of the Earth's atmosphere that
repels the sun's ultraviolet rays.
16. It combines Hydrogen and Oxygen to
create energy that can be used in cars.
17. It is the name given to gasses that trap heat
and cause global warming.
18. It is the most abundant element in the
universe.
Down
1. These are the three (3) "R’s that help you
create a more sustainable world
3. It is one (1) of the factors that cause global
warming, desertification, and loss of
topsoil.
5. It is the most common greenhouse gas
which is breathed out by humans and
consumed by trees.
7. It is the energy that can be used an infinite
number of times.
8. It is the most toxic greenhouse gas emission
that is common around landfills and farms.
10. It is the most abundant energy source
capable of being harnessed by humans.
11. It means living within the limits of the
Earth's natural resources
12. It is the cleanest fossil fuel most often found
in fragile areas of nature.
14. It is the term given for food sold in
supermarkets and grown or fed without
synthetic fertilizers, chemicals, hormones,
and antibiotics.
15. This important layer of dirt is essential for
ensuring plant growth and its nutrients are
retained by trees.

2. Rearrange the letters into words that fit the descriptions in page 1.
Across
2. APE - EPA
4. ETSSMEYCO-ECOSYSTEM
6. GLCOOCALIE TROPITNFO
- ECOLOGICAL FOOTPRINT
9. ESERT- TREES
13. NZOEO RAYEL- OZONE LAYER
16. LEUF ELCL- FUEL CELL
17. NOEERHUSGE- GREENHOUSE
16. DGRENYOH-HYDROGEN
Down
1.ERYEUSCDCERLUERECE-REDUCE-REUSE-RECYCLE 10. SLRAO YGNEER-SOLAR ENERGY
3. TESTONIFEDRAO- DEFORESTATION 11. STILABAUSNE- SUSTAINABLE
5. ROBNCA OXIIEDD- CARBON DIOXIDE 12. URLAANT AGS- NATURAL GAS
7. WEAENBELR EGERYN- RENEWABLE ENERGY 14. NGACIRO- ORGANIC
8. NHETEAM- METHANE 15. TLPSOOI- TOPSOIL
References:
Crossword puzzle clue. (n.d.). Retrieved from www.apsenergyconservation.org:
http://www.apsenergyconservation.org/PDF/417CrosswordPuzzleMS.pdf
Puzzle fast. (2015). Retrieved from http://www.puzzlefast.com/: http://www.puzzlefast.com/en/puzzles/20150920852213