Natural and man-made materials
Where do natural materials come from?
From animals, minerals, and plants.
Que son las tres máquinas simples?
Polea, palanca, plano inclinado
What is an example of thermal energy?
Hot chocolate
Examples of renewable energy sources:
Wind, water and sunlight
Thermal power plants use this to produce electricity.
Fossil fuels
Where do cotton and hemp come from?
Plants.
Que es un ejemplo de una máquina simple como la palanca?
Las tijeras
What is an example of electrical energy?
The lights.
Nonrenewable energy sources:
Coal, petroleum and natural gas.
What are two examples of rocks?
Granite and marble.
Que forma tiene la rueda?
Circular
What is an example of light energy?
The sun
What do we use petroleum for?
We use it in cars and in plastics.
5 examples of man-made materials
Paper, glass, pottery, ceramic, and metals
Las máquina compuestas están formados por muchos elementos. Como se llaman estos elementos?
Operadores
What is an example of mechanical energy?
The door.
What do we use natural gas for?
We use it in our homes.
Where are most plastics obtained from?
Petroleum
Que son los dos tipos de motores?
Eléctrico o combustible
What is an example of chemical energy?
breakfast
What's the difference between renewable and nonrenewable energy sources?
Nonrenewable energy sources will run out!