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Welcome to Earth!
Here's a clue from Commander Trubble to get you started: 
 
Curious beings known for their production of a gas called oxygen, food like nuts and berries, and a material called wood, trees are what humans refer to as natural resources. Resources are necessary for all life on Earth. 


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Object: Long gripping tentacles called roots. Function: Steady tree against strong winds. Collect water and minerals from soil. Protect soil from flooding.

<!-- Question 1 -->
Why do earthlings need trees as natural resources? 
A- to provide oxygen to breathe
B- to provide wood for furniture, paper, and tires
C-  to protect against lightning
D-  both A and B 

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Commander's Clue:
 
Look carefully, for hidden in this scene is proof of how earthlings form their products. Once humans use their underground supply of oil, coal, or iron, these nonrenewable resources are gone forever. Humans consider plants and animals to be renewable, but sometimes these resources are used faster than they can reproduce.

<!-- Second Clue -->

Much like their fellow mammal the monkey, earthlings use their limbs to swing from these bars. 

Material name:
Steel

Research shows:
To make steelm humans heat the Earth's iron, limestone, and coal in a large oven called a furnace. Then they shape steel into products.

<!-- Another Clue -->

Young earthlings observed sliding down this slanted object.

Material name:
Plastic.

Research shows:
In a mysterious process, plastic can be made from petroleum, an oily liquid that is pumped up from the Earth.

Click Here for more information on plastics.

<!-- Second Question -->
Which of the following resources make products? 
    A- plastic
    B- steel
    C- petroleum
    D- all of the above 


<!-- Third clue -->
Object:
Strudy, woveb storage unit called basket.

Research shows:
Earthlings keep syrable objects like baskets, furnitute and appliacnces for many years. Repariing durable goods rather than buying new ones is one way earthlings use less.

<!-- Another Third clue -->
Object:
Metal, liquid-holding vessel called thermos.

Research shows:
Refillable containers can be used over and over for different substances. Other refillable items incluse glass bottles, jars and plastic jugs.

<!-- Third Question -->

How do earthlings reduce waste by using less? 
A-    avoid natural wrapping
B-    buy durable goods
C-   throw away bulk items
D-   both B and C 


<!-- FOURTH CLUE a -->
Object:\Fragrant, lumpy mound called compost pile.\ \Function:\Allows grass, leaves, paper, and some food items to decay naturally, rather than be thrown away. Creates a rich, soil-like substance called compost. Added to the garden, compost helps plants grow.

<!-- FOURTH CLUE b -->
Object:\Shiny, metallic container called garbage can.\ \Function:\Holds materials that cannot be recycled, reused, or composted. Earthlings place most of their trash here., null"

<!-- FOURTH CLUE c -->
Object:\Smooth, colorful box called recycling bin.\ \Function:\Stores items like newspapers, plastic and glass bottles, and metal cans. Placing materials in this box keeps them from being thrown away. The first step in a process called recycling.\ \CLICK HERE FOR MORE INFORMATION ON RECYCLING., ../moreinfo/recycle.htm"

<!-- FOURTH CLUE d -->
Object:\Flat, grooved disc called tire swing.\ \Function:\Provides entertainment by suspending earthlings above ground. Lets earthlings reuse tires instead of discarding them.

<!-- FOURTH Question -->
Why do earthlings reuse, recycle, and compost? 

a    to make landfills bigger
b    to help animals grow
c    to conserve resources
d    all of the above