What questions did we try to answer? › Alive? How did we answer this? › Observations In different environments Under a microscope › Testing

Is it Alive? LabGroup 1 Presentation

Questions:

What questions did we try to answer?› Alive?

How did we answer this?› Observations

In different environments Under a microscope

› Testing Bromo Thymol Blue

Environments

The unknown was added to 5 different environments, and kept as a control to compare results.› Salt› Salt water› Sugar water› Soil› Soil and water› Control

Salt

Day 1› No visible change

Day 2› Unknown turned black and apparently died

Day 3› No visible change

We tested the Unknown with salt to see its (chemical) reaction, if any.

Salt Water

Day 1› No visible change

Day 2› Motion could be seen by naked eye› Under microscope, (red), what was clearly

some species of insect appeared to be eating the immobile black spots, or reacting similarly.

Day 3 › The mobile creatures died, and turned a orange

color.

Salt Water (Cont…)

We tested it in salt water because salt water creatures would die in freshwater

Sugar Water Day 1

› What could be a seed sprout and was clearly made of cells was in a curved shape like that of a sprout opening, with mobile cells floating around the edges

Sugar Water Continued

We tested the Unknown in sugar water to give some form of sustenance (sugar) to anything that was living in the Unknown

Soil

Day 1 › No visible change

Day 2› No visible change

Day 3› No visible change

We put the unknown I soil to see if it would grow, without water

Soil and Water

Day 1› Unknown became soggy, but no spouting

occurred Day 2

› no visible change Day 3

› All water evaporated, leaving everything dry

We put the unknown in soil and water to see if it would grow, with water

Bromo Thymol Blue Test

The specimen showed evidence of energy conversion, as it gave off carbon dioxide, which turned the Bromo Thymol Blue green.

More Questions

Did it show evidence of reproduction? Concluding

Reproducing

The salt water creatures showed signs of reproducing, because there were no sign of them on day 1, but by day 2 there was a multitude, showing that they reproduced overnight.

Conclusion: It’s alive

Can I answer yes to ALL of these questions?› Does it respond to its environment?› Does it reproduce?› Does it grow/ develop?› Does it convert some form of energy?› Is it made of cells?