A diagram of a plant cell
A Styrofoam solar system made by a 6th-grade science student
A 3-D computer image of an atom
A data table from a plant-growth experiment
Birds have feathers of different colors.
There are only 400 Siberian Lynx left in the wild.
There are 75 different kinds of cells in the body.
There are over a million different species in the jungles of Africa.
Changes occurred over a short period of time.
The birds on different islands have different food sources.
Conscious decisions let certain finches survive.
Some finches nest on rocks.
Soil 1 and Soil 2 are the same
The fertilizer has a greater effect in Soil 1
The fertilizer has a greater effect in Soil 2
Soil 1 absorbed more fertilizer than Soil 2
Vegetation in the area would grow at a faster rate.
Vegetation in the area would grow at a slower rate.
Vegetation in the area would not be affected.
Vegetation in the area would find other nutrient sources.
There will be fewer natural resources available for future generations.
There will be an increase in nitrogen levels in the atmosphere.
There will be a decrease in water pollution.
There will be an increase in the number of strong hurricanes.
A computer simulation of Earth's climate changes
A group of monkeys to represent behavior in a natural environment
An x-ray showing multiple fractures in a bone
A salt-water aquarium in the home of a fish enthusiast
A nutrient medium
An enzyme solution