Earth's atmosphere
The Water Cycle
The Rock Cycle
Cells
Misc.
100
The layer of the atmosphere where all weather occurs.

What is the Troposphere? 

100

The total amount of water on earth is changing or staying the same?

What is staying the same?

100
Type of rock made by heat and pressure inside the earth.

What is metamorphic rock?

100

Cells are sorted into these two types.

What are plant and animal cells?

100

Does earth rotate once exactly every 24 hours?

No. (23 hours, 56 minutes, 4 seconds)
200

The layer of the atmosphere where the Ozone Layer can be found.

What is the Stratosphere?

200

The process of plants "sweating" water through pores in their leaves.

What is transpiration?

200

The process of rocks being shoved up out of the earth to be exposed.

What is uplift?

200

Plant cells have this outer barrier that animal cells do not.

What is a cell wall?

200

This type of precious metal valued for its color and non corroding properties is so soft in its pure form it can be molded with bare hands.

What is gold?

300

The layer of the atmosphere that is the hottest (1500 degrees or more)

What is the thermosphere?

300

This make up only 3% of earths total water.

What is fresh water?

300

Rocks can be made of organic life, but are primarily composed of this.

What are minerals?

300

The place in a cell where the cell's DNA is stored and protected.

What is the cell nucleus?

300

This is the number of days a cockroach can survive without its head.

What is 9 days?

400

How the layers of the atmosphere are delineated.

What is temperature to elevation change.

400

The process of taking salt from water to produce fresh water.

What is desalinization? 

400

Shale is a sedimentary rock composed of layers of this.

What is mud?

400

The powerhouse of a cell.

What is the mitochondria?
400

Most of the earths oxygen is made here.

What is in the ocean?

500

This layer of the atmosphere is associated with shooting stars.

What is the mesosphere?

500

The driving force's of earths water cycle.

What are the sun and gravity?

500

The primary difference between the two types of igneous rocks  called obsidian which is shiny and basalt which is dull is due to this.

What is cooling time.

500

Plant cells have large ones for storing water, animal cells have small ones. 

What is a vacuole? 

500

The human body contains 10 times as many of these as it does its own cells.

What are bacteria?