Physics

How does a rice cooker cook food?

         

• By light

• By magnetism

• By conduction

• By convection

Why is metal used in cookware such as frying pans?

• It's cheaper

• It's shiny     

• It conducts heat well

• It’s lighter

How does a fan cool a room?

• Lowers room temp

• Evaporates sweat  

• Absorbs heat   

• Adds cold air

How does a fridge keep food cold?

• Blows cold air

•  Uses ice      

• Absorbs heat  

• Uses fans

How does a pulley help lift loads?

• Reduces weight  

• Adds force   

•  Increases size    

• Changes direction

How does a speaker produce sound?

• Uses vibration

•  Reflects waves    

• Stores sound

• Uses air pressure

Why is a roller coaster a good example to show how energy works?

• Uses fans   

• Shows energy change  

• Only uses potential  

• Makes sound

How does a thermos prevent heat loss to the surroundings?

• Air flow   

• Metal lining

• Vacuum layer

• Ice inside

Why do wires heat up as current passes through them?

• Sunlight  

•  Resistance

• Plastic coating  

• Air friction

Which of the following best describes how bulbs behave in a series circuit compared to a parallel circuit?

• In series, bulbs shine brighter

• In series, bulbs work independently

• In series, if one bulb goes out, all bulbs go out

• In parallel, there is no current flowing