Résultats de "Kathiann Kowalski" dans Toutes les catégories

What are checks and balances? They are limits that keep different parts of government from having too much power. But just what are these limits? And how do they help our government run more smoothly? Listen to this audiobook to find out.

Each year, more than 250 hikers need assistance at the Grand Canyon. If you plan ahead and use safety smarts, you can avoid becoming number 251! And you can have a great hiking adventure.

Cars, wagons, and other vehicles aren't the only places you'll find wheels . . . Be on the lookout for these and other working wheels.

Did you know if you break a bone, the bone can repair itself? You'll need to visit the doctor to have your broken bone set in a cast, while your body is hard at work repairing the injury! The moment you fall, blood from your injury sends signals to cells to start building new bone–the process of repairing is on its way! Do you know what your body makes to create new bone?

Have you ever had an electrical power outage at home? In 2003, the largest blackout in United States history left millions of people without power for days! Learn how power generation plants are connected to the power grid that distributes electricity to regions of the country and to homes. What causes power outages? How does losing power affect daily life? What can people do to conserve energy?