Main Idea

Front

Before toothbrushes, people used natural objects for dental hygiene.

Back

People used natural objects to clean their teeth.

Front

Beavers create significant environmental changes by building dams, leading to new ponds and lakes.

Back

Beavers make dramatic changes to the environment.

Front

Christopher Paolini became an author at a young age.

Back

15 years old when he wrote Eragon.

Front

Mother octopus lays thousands of eggs and guards them constantly in a den. After hatching, the babies float away and she dies.

Back

Takes good care of her eggs.

Front

Maasai people depend on cattle for food and trade, spending time tending to them.

Back

Live in East Africa.

Front

In Peru, many people eat Guinea pigs.

Back

In Peru, many people eat Guinea pigs.

Front

Cattle and sheep are raised in large ranches called stations in Australia.

Back

In Australia, cattle and sheep are raised in huge ranches called stations.

Front

Sharks have many teeth, up to 3,000 at once, growing in rows. They can have over 20,000 teeth in a lifetime.

Back

Sharks have a lot of teeth.

Front

Most animals do not recognize themselves in a mirror. Some that do are elephants, dolphins, chimps, and great apes.

Back

Most animals do not recognize themselves in a mirror.

Front

Smallest monkey: pygmy marmoset, 5 inches tall, 4 ounces, lives in the Amazon.

Back

Pygmy marmoset.