Cred - believe
Graph - write
Geo - earth, ground
Hydr - water
Grad, Gres - step
100

Not able or willing to believe something;  feeling or showing a lack of belief.

incredulous

100

A shiny, black substance that is used in pencils. 

graphite

100

The natural features, population, industries of a region.

geography

100

The state in which a large amount of water has been lost or remonved from the body or from food. 

dehydrated

100

Moving or changing in small amounts; happening in a slow way over a long period of time. 

gradual

200

A person, bank, or company that lends money to someone. 

creditor

200

An outdated system of sending messages over long distances by using wires and electrical signals. 

telegraph
200

The art or science of agriculture. 

geoponics

200

To slide on a wet road because a thin layer of water on the road causes the tires to lose contract with it. 

hydroplane 

200

To treat something or someone poorly and without respect. 

degrade

300

A statement of the basic beliefs of a religion; an idea or set of beliefs that guides the actions of a person or group.

creed 

300

The signature of a famous person.

autograph

300

The science dealing with the earth's history as recorded in rocks and layers of soil; the rocks, land, and processes of land formation of a particular area. 

geology

300

A pipe in or near the street that provides water, especially for putting out fires. 

hydrant

300

Moving forward; using or interested in new or modern ideas. 

progressive

400

A quality, skill, or experience that makes a person suited to do a job. 

credential

400

A part of a piece of writing that deals with on subject, begins on a new line, and is made up of one or more sentences.  

paragraph

400

Of or relating to the natural features, population, industries, of a region. 

geographic

400

Operated by the pressure of a fluid.

hydraulic

400

To earn a degree or diploma from a school, college, or university.

graduate

500

Able to be believed; reasonable to trust or believe.

credible

500

Pictures or words painted or drawn on a wall, building, etc. 

graffiti

500

A person that studies rocks and soil in order to learn about the history of the Earth. 

geologist

500

To add water or moisture to something; to supply something with water. 

hydrate 

500

To return to an earlier and usually worse or less-developed condition or state. 

regress

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