The high mountains of Peru are cold. The Incas could not grow corn [9] there but they could grow potatoes. How did those potatoes get to [10] Europe! the early Spanish explorers of Peru brought them to Spain in the 1530s. What a success potatoes were at [11] first, wealthy people had parties just to try the new food.
Then some questions arose. Did potatoes cause [12] disease, or did they poison the soil? For a while, many Europeans believed potatoes were dangerous. Fortunately, people got over such a silly idea. They planted potatoes [13] widely and soon the crop was plentiful. How important the new crop turned our to [14] be many Europeans had enough food for the first time.
The path a river takes.
Buttercups are yellow flowers.
The land alongside a river is its bank the surface on which it flows is its bed.
You inhale oxygen you exhale carbon dioxide.
What a beautiful butterfly that is!
Do not climb the fence.
Do you know why the sky is blue?
The Redwood tree grows over 60 feet tall.
A roadrunner dashes across the desert.
The excited boy jumped up and down when he saw the ice cream truck.
Conservationists care about wildlife
Roses are red, and violets are blue.
Although it is summer, you can make snowballs at Glacier National Park.
The muscles in a cat's legs are very strong.
Is the Loch Ness monster real, or is she a mythical creature?
Check out the pinball machine at the Franklin Institue before you leave Philadelphia.