Science test: light and heat

Label the objects depending oh how much light passes through them. transparent opaque transparent translucent opaque translucent Match the two columns Light passes easily through them Transparent Light cannot pass through them Opaque Only some light can pass through them Translucent Look at the photograph and answer the questions. When can you see a rainbow? How do rainbows form? What are the properties of light? Complete the definitions Heat: is the transfer of thermal energy from something hotter to something cooler.Temperature: tells us how hot or cold an object is. We use thermometers and it is measured in degrees CelsiusLight: a form of energy that allows us to see everything around us.Substances expand when their temperature increases and contract when their temperature decreases Write heat conductor or heat insulator conductor conductor insulator insulator insulator If you put both (wooden and metal) spoons in hot chocolate, which spoon will warm your fingers? Why? Reflection or Refraction? You see yourself in a car window. ReflectionA stick looks bent in water. RefractionYou see the sky on the surface of a lake. ReflectionThe leaves of a plant appear green. ReflectionA fish looks longer on the water. Refraction Do not absorb any colour of light, they reflect all light White objects Black objects All objects None of the answers When light passes from one material to another material with a different density Reflection Refraction When light hits an object, it bounces off the object and changes direction Reflection Refraction Mirrors reflect most of the light. True False Fire is a... Natural source Man-made source Laser beams are... Natural source Man- made sources When two objects at different temperatures come into contact, heat goes from the cooler object to the hotter object until both reach the same temperature. True False