Health And Lifestyle, Energy And Energy Transfers Flashcards
Stored energy in a battery is called ____ energy
Chemical
Energy stored in a hot cup of cofee is called _____ energy
Thermal
The energy in a stretched elastic band is called
Elastic potential
Energy in a moving object is called
Kinetic energy
What are the 2 main conversions which take place when a torch is in use
- Chemical energy to electrical energy
- Electrical energy to Thermal Energy
Energy cannot be created or destroyed. Only transfered. What is the law
Law of conservation energy
What is the law of conservation energy.
Energy cannot be created or destroyed, only transferred
What is convection?
Convection is the transfer of thermal energy throught the movement of a liquid or gas
What is the transfer of thermal energy throught the movement of a liquid or gas?
Convection
What is conduction?
The transfer of thermal energy through direct contact.
What is the transfer of thermal energy through direct contact?
Conduction
What is radiation?
The transfer of heat energy through space by electromagnetic radiation
What is the transfer of heat through space by electromagnetic radiation?
Radiation
Examples of radiation
Ultraviolet light from the sun
Heat from stove burner
Visible light from a candle
Examples of conduction?
When you touch an ice cube(direct contact) this causes the heat from your hand to be transferred to the ice cube. Then the ice cube melts.
Ironing of clothes is when the heat is conducted from the iron to the clothes
Examples of convection
Hot air rising above a fire
Ice melting(heat moves from the ice to air)
Suggest one disadvantage of using wind to generate electricity
The wind turbines are intermittent meaning that it relies on the weather and wind.
Glucose is absorbed in the small intestine. What carries glucose from the intestone to other parts of the body?
The bloodstream
Whrere is glucose absorbed
The small intestine
Why do you take glucose?
To provide energy.
Eating to much fat is bad for you. Give one reason for this
Increased risk of obesity. A risk factor for cardiovascular disease( mainly heart disease and stroke).
Eating too little fat is bad for you. Give one reason for this
If you are underweight, you may be at greater risk of certain health conditions. This could be decreased muscle scrength and lowered immunity.
What is the equation for work done?
Work done(J)= Distance(M) x Force(N)
All objects ___ and ___ infared radiation
.
All objects EMIT and ABSORB infared radiation
