Unit 5 Week 5

Weekly Concept Energy Essential Question What are different kinds of energy?

TIME FOR KIDS We've Got the Power! Carlos lives near a windmill farm. He loves to ride past on his bike and watch the turbines spin in the wind. Wind power makes electricity that heats his house and powers his lights. Energy comes from many different sources. Energy from the wind and the Sun are renewable. They can be used again and again. Talk About lt Write words you have learned about energy. Talk with a partner about the different kinds of energy.

Vocabulary Use the picture and the sentence to talk with a partner about each word.

Your Turn Pick three words. Then write three questions for your partner to answer.

This energetic snowboarder gets his power from the healthful foods he eats. Essential Question What are different kinds of energy? Read why solar energy is a good source of power.

Here Comes Solar Power What do you have in common with a car and a factory? You both need energy to run. Energy keeps things moving. Energy Today You get your energy from eating healthful foods. Most factories, homes, and cars get their energy from fossil fuels. Coal, petroleum, and natural gas are fossil fuels. They have been the traditional, or usual, energy sources for more than a century. Today, most of the energy we use in the United States comes from burning fossil fuels. But these fuels come from deep under the Earth's surface, and they are running out. They cannot be reused. Once a fossil fuel is gone, it's gone forever. So we need alternative energy sources to replace them. Scientists know that there is no other way to keep our country going and growing. So they are looking for new, alternative sources of energy that won't run out.