Gizmo Warm-up Imagine a new alien life form has just been discovered on a nearby planet. Your job is to study this new

life form. The Effect of Environment on New Life Form Gizmo

shows 100 individuals that have been transported from the

planet to your laboratory.

1. The new life form can have three shapes: thin, medium,

and thick. How many of each shape are there now?

Thin:

Medium:

Thick:

2. Click Play ( ). Do the numbers of each type of alien change over time?

3. Click Reset (). A variable is something that can be changed in an experiment. Look on

the SIMULATION pane. What are the three variables you can change in your laboratory?

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.