Science Pg 24-30 Flashcards
How do our bodies lose heat
Through radiation
How is heat losses and gains lost to the environment
By convection
Conduction
Radiation
How is heat lost to the environment by conduction
By cooking over a 🔥
How does hot tea/coffee lose heat by conduction
Through the cup that it’s in
Heat energy can also be gained by conduction radiation convection
True or false
True
How do solar heaters gain energy from the environment
They absorb heat energy from the sun 🌞
do Convection currents from a heater warm up the air in a room
True
Does food in a pot on a stove gains heat by conduction
Yes
How do solar water heaters work
5
.cold water flows through the pipes of a solar water heater
.the sun heats the water in black pipes in the solar heater on the roof by conduction
.the heater has a glass cover to allow the sun’s heat through
.the heater should face the direction which gets the most sunlight in the day
.heated water flows through the hot water cylinder, which is connected to the water pipes in the house
Where does solar energy come from
The sun
What do insulating materials do
They slow down the heat losses and gains by conduction radiation convection
Why do ppl use insulating materials ????and what is this known as
To reduce heat losses in winter and heat gains in summer. Energy conservation
The best insulators are the ones that contain air spaces
True/False
True
9 exp. Of good insulators
Grass Cork Thatch roofs Feathers Curtains Straw Fiberglass Wool Styrofoam
What r ceilings used for
2 insulate our houses
