sun is the primary source of heat and light......
The Sun is our primary source of light and heat here on Earth.
The primary source of light on Earth is the Sun. It emits light and heat energy through a process called nuclear fusion in its core. This light sustains life on our planet and allows for photosynthesis to occur in plants.
Wood is the first discovered primary energy source. Some believe that Solar energy (as heat caused by sun light) is the first discovered primary energy source.
Heat and light can be generated from various sources such as the sun, fire, electricity, or chemical reactions. The sun is the primary source of both heat and light for Earth, while artificial sources like light bulbs and heaters use electricity to produce heat and light.
The primary source of light and heat energy for Earth is the Sun. The Sun's radiation travels through space and reaches Earth, providing the energy necessary for life to exist on our planet.
The primary light source is the sun for the planet Earth.
The sun is the source of heat and light for plant-life.
Sun is the primary source of heat here in the Earth. As time moves on, human developed new sources of heat and light. Some of it are the torches, lamps, candles and others
EM (or emergency heat) can be used if you have a problem with your other heat source such as a heat pump. In most cases, you will not need this but what it does is bi-passes the primary heat source and allows your secondary heat source (normally your furnace) to become the primary.
The auxiliary heat in your heating system comes on when the primary heat source, such as a heat pump, is unable to meet the desired temperature setting. This usually happens during very cold weather or when the primary heat source is not functioning efficiently. The auxiliary heat helps to supplement the primary heat source and maintain a comfortable temperature in your home.
We're modestly familiar with the source of heat and light. And we know that heat and light both exist and are real. Cold and darkness do not exist. They merely describe the lack of heat and light, respectively.
The Sun is Earth's primary external energy source. Solar radiation emitted by the Sun provides heat and light energy to sustain life on Earth through a process called photosynthesis.