Why is the sun important for life on the earth for Class 4?
It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth. Plants need sunlight to grow. Animals, including humans, need plants for food and the oxygen they produce. Without heat from the sun, Earth would freeze.
What are the four stages of the sun’s life cycle?
Ultimate Fate of our Sun: As such, when our Sun runs out of hydrogen fuel, it will expand to become a red giant, puff off its outer layers, and then settle down as a compact white dwarf star, then slowly cooling down for trillions of years.
Is the Sun 4 billion years old?
The sun was born about 4.6 billion years ago. Many scientists think the sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust known as the solar nebula. As the nebula collapsed because of its gravity, it spun faster and flattened into a disk.
What is the life cycle of the sun?
The Sun is currently a main sequence star and will remain so for another 4-5 billion years. It will then expand and cool to become a red giant, after which it will shrink and heat up again to become a white dwarf. The white dwarf star will run out of nuclear fuel and slowly cool down over many billions of years.
What are the 5 importance of the Sun?
The Sun warms our seas, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth. We know the Sun through its heat and light, but other, less obvious aspects of the Sun affect Earth and society.
What are 5 benefits of the Sun?
A Healthy Summer: 5 Benefits of Sun Exposure
- The sun’s light kills bacteria. Surprisingly enough, sunlight does kill bacteria!
- Sunlight reduces your blood pressure.
- Sun exposure reduces cancer risk.
- The sun strengthens your bones.
- Sunlight improves your sleep quality.
How old is the oldest sun?
Or not so much? Our Sun is 4,500,000,000 years old. That’s a lot of zeroes. That’s four and a half billion.
What are the steps in the life cycle of a Sun like star?
On the left the star is seen as a protostar, embedded within a dusty disc of material as it forms. It later becomes a star like our Sun. After spending the majority of its life in this stage, the star’s core begins to gradually heat up, the star expands and becomes redder until it transforms into a red giant.
What are 3 good things about the sun?
Sunlight is essential for human health and well-being. The health benefits of sunlight include generating the production of vitamin D, supporting bone health, lowering blood pressure, preventing disease, and promoting good mental health.
What are four importance of the sun?
The Sun warms our seas, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth.
Why sun is important in our life?
The sun has extremely important influences on our planet: It drives weather, ocean currents, seasons, and climate, and makes plant life possible through photosynthesis. Without the sun’s heat and light, life on Earth would not exist.
Why does sun make you happy?
Exposure to sunlight is thought to increase the brain’s release of a hormone called serotonin. Serotonin is associated with boosting mood and helping a person feel calm and focused. At night, darker lighting triggers the brain to make another hormone called melatonin.
What is the fourth stage in the life cycle of an average star?
Stage 4 – The core collapses in less than a second, causing an explosion called a Supernova, in which a shock wave blows of the outer layers of the star. (The actual supernova shines brighter than the entire galaxy for a short time).