Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


For Middle School Agri science Contest (CDE)

Plant Name About Plant
Canadian Thistle weed:a perennial herb (Cirsium arvense) in the composite family, native to Europe and naturalized as a noxius weed in North America having spiny-margined leaves and rose-purple or sometimes white flower heads
Lambsquarter weed:common weedy European plant introduced into North America; often uses as a potherb
Cocklebur weed:any of the several annual weeds of the genus Xanthium, in the composite family, having small seedlike fruits enclosed within a prickly bur that clings readily to clothing or animals fur
Quack grass weed:European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed
Dandelion weed:A Eurasian plant of the composite family having many-rayed yellow flower heads and deeply notched basal leaves. Wildly naturalized in North America as a weed
Ragweed weed:Any of various weeds of the genus having small ,greenish, unisexual flower heads and producing abundant pollen that is one of the chief causes of hay fever
Green foxtail weed:European foxtail naturalized in North America; often a troublesome weed
Velvet leaf weed:tall annual herb or subshrub of tropical Asia having velvety leafs and yellow flowers and yielding a strong fiber; naturalized in southeastern Europe and United States
Jimsonweed weed:A course poisonous plant (Datura stramonium) having large, trumpet-shaped white or purplish flowers and prickly capsules
Wild musturd weed:any of several weedy plants belonging to the genus Brassica, of the mustard family,as charlock
Barley seed:A grass in the genus Hordeum,native to tmeperate regions,having flowers in terminal,often longawned spikes
Rye seed:a cereal grass (Secale cereale) widely cultivated for its grain;The grain of this plant, used in making whiskey and for lifestock feed
Corn seed:also called indian corn it is a usually tall grass,Zea mays,, cultivated for its yellow edible grains, which develop on a spike; the grain of this plant, used for food,fodder,and as a source of oil
Soybeans seed:a southeast Asian annual leguminous plant (Glycine mex), widely cultivated for forage and soil improvement and for its nutritious seeds
Oats seed:Any of various grasses of the genus Avena, especially A. sativa, widely cultivated for their edible grains
Wheats seed:Any of various annual cereal grasses of the genus Triticum of the Mediterranean region and southwest Asia, especially T. aestivum,widely cultivated in temperate regions in many varieties for its commercially important edible grain
Sorghum seed:An Old World grass (Sorghum bicolor), several varieties of which are widely cultivated as grain and forage or as a source of syrup