SCIENCE CONCEPTS Have students suggest ways in which consumers depend on other living things and ways in which energymoves through food chains and foodwebs. Write their responses on the board,and have them revise their ideas as theyprogress through the lesson.Ouch! Only female mosquitoes bite...
G2 How do living things use energy? 102019-05 3 G2 What is energy? 102019-05 4 G2 How can cooling and heating change ma 62019-05 5 G2 How can matter be changed? 122019-05 6 G2 What are the states of matter? 102019-05 7 G2 What are the states of matter? 72019-05 8 G2 ...
Collecting solar energy does not produce pollution, so it's a "green" way to create electricity for everyday use. But since sunlight isn't always available, the Sun is not the most reliable(可靠的)source of energy.Wind powerWind is a natural, clean and inexpensive source of energy. Wind ...
To produce this kind of energy, people "collect" sunlight and change it into electricity. It takes special equipment to do this, but once the equipment is made, solar energy is free. Collecting solar energy does not produce pollution, so it's a "green" way to create electricity for every...
Energy-saving and emission reduction 气候变化是人类面临的全球性问题,二氧化碳排放温室气体猛增对生命系统形成威胁。世界各国以全球协约方式减排温室气体,中国提出“2030碳达峰”、“2060碳中和”目标,即“二氧化碳人为移除抵消人为排放”,承诺二...
the clear water was a turbid stream. Trees less, castle peak bald, grassland drought, water dark and make people living environment deteriorate, breathe the air, living environment "occupied" by many harmful things, the virus will take into the body of people, we human beings will suffer from...
Energy is something that kids and grownups need and use every day at work and at school. People get energy from food. Once food converts to energy in the body it gives them the strength and energy to go to work or school and to use their bodies and brains to get things done. Some...
Your energy is transferred (转移) to the bike. That makes the bike move. Now imagine riding your bike to create enough power to run a computer. Some students at one school did just that! They jumped on bikes connected to generators (发 电机) and pedaled in place. Soon they were ...
C) Consuming more energy drinks and sports drinks. D) Forming the habit of exercising regularly. Questions 3 and 4 are based on the news report you have just heard. 3. A) He asked them about his lost paintings. B) He knew the owner of two missing paintings. C) He left his...
Food energy can be defined as the chemical energy derived from food people and animals consume. In this sense, human beings and animals must eat food to acquire the energy necessary for the body's healthy functioning. Without food, the body uses up the stored glucose as energy and later ...