Main Idea

Front

A dinosaur had a brain weighing as much as three pencils, a body of ten tons, and was over twenty feet long. It wasn't the brightest dinosaur!

Back

What one dinosaur's brain was like.

Front

Main idea about seaweed: colors and sizes vary, some grow to 100 feet, forming forests for fish.

Back

What seaweed is like.

Front

Bird range refers to the area a bird flies, varying from global distances to under 100 miles.

Back

How bird ranges differ.

Front

Not all water-dwelling animals are fish. Frogs, tadpoles, whales, seals, and some snakes also live in water. Main idea?

Back

Which animals live in water.

Front

Main idea of traffic light safety: Some drivers ignore signals, leading to danger.

Back

What the traffic light signals

Front

About 13,000 wild horses exist in the Southwest, struggling for food in winter due to snow covering grass and bushes. Their numbers decline yearly.

Back

What is happening to our wild horses.

Front

Main idea about car colors and safety.

Back

Which color cars are safest.

Front

Great waves from the ocean, known as tidal waves, are caused by undersea earthquakes or distant storms, and can rise over fifty feet.

Back

What tidal waves are like.

Front

Navajo Indians have increased from 6,000 to 90,000 in 100 years, making them the largest Indian tribe.

Back

Growth of the Navajo tribe.

Front

Main idea: An octopus waits for fish, then uses its arm to catch them.

Back

How an octopus gets its food.