Science-4th Qtr- Mr Sun, Sun. Mr. Golden Sun Flashcards
Is an important component of the Solar System. It is found at the center of the Solar System with the other planets moving around it.
Sun
It has a powerful gravity that attracts all the other objects in the Solar System toward it. It is our daytime star and our source of heat and light.
Sun
Composition of the sun. (elements)
70% hydrogen gas
28% helium gas
2% heavy elements such as carbon, iron, oxygen.
NASA -stands for?
National Aeronautics and Space Administration (NASA)
According to NASA the core of the sun has a temperature of _______.
15,600,000 degree celsius.
It keeps the Solar System together. It attracts all objects to it and also the planets to one another.
gravity
True or False: The diameter of the sun is about 1,390,000 km. It is about 9 times the diameter of Earth and about 330,000 times more massive than Earth.
True
True or False: The sun is composed of the core, the radiation zone and the convection zone.
True
Is the outermost layer of the sun’s interior.
convection zone
Is a region between the core and the convection zone. Energy produced from the core travels outward through radiation.
radiation zone
Is the innermost part of the sun. Enormous amount of energy is produced here.
core
Due to its very high temperature hydrogen gases combine to form helium in a process called ______. This fuels the sun to produce heat and light energy.
nuclear fusion.
The atmosphere of the sun consists of ______ and ______.
hydrogen
helium
Is the inner layer of the sun’s atmosphere. The gases are thick enough to be seen. That is why it is the visible part of the sun.
photosphere
Lies above the photosphere. It is the middle layer of the sun’s atmosphere.
chromosphere
Is the outer part of the sun’s atmosphere. It can be seen during a total solar eclipse.
corona
It is an instrument use by astronomers to observe the corona during a total solar eclipse.
coronagraph or coronameter
True or False: The sun is a dynamic and active star.
True
_____ are areas that are slightly cooler than other regions of the sun.
Sunspots
The eruption of gases from the chromosphere is termed as _______.
prominence
_____ are violent explosions on the sun’s atmosphere.
Solar flares
The _______ comes from the sun and moves in all directions with the speed of 400 kilometers per second.
solar wind
True or False: Solar flares can greatly increase the solar wind, which means that more particles reach the upper atmosphere of Earth.
True
True or False: The sun is important to all living things on Earth.
True
The _____ tells time depending on the position of the sun’s shadow during the day.
sundial
True or False: The sun always rises in the east and sets in the west.
True
True or False: During rainy days, mountain slopes become slippery and can be dangerous to mountaineers.
True
What benefit does exposure to sunlight give you when doing physical and outdoor activities?
Sunlight activates vitamin D found in our skin. In turn, vitamin D helps in the absorption of calcium that makes the bones strong and hard.
True or False: Too much exposure to sunlight may cause sunburn.
True
How to prevent from getting a sunburn?
use an umbrella and apply sunblock to protect the skin from the harsh effects of ultraviolet rays
A ____ is a change in the environment to which organisms respond in the different ways.
stimulus
True or False: Too much heat causes dehydration.
True
Some animals become inactive during long hot days is called?
destivation
What happens when animals destivate?
Their breathing, heartbeat, and other body processes slow down. This lessens the need for water allowing these animals to survive despite the heat.
True or False: Plants need energy from the sun to manufacture their own food or undergo photosynthesis.
True
Is it true that solar batteries use light and heat from the sun?
Yes, true.
How does solar technology works?
The energy from the sun is collected in solar panels to produce electrical energy.
Give at least 5 ways to protect yourself from the harmful effects of the sun?
- Avoid or limit your exposure to the strongest rays of sun. Strongest rays strike Earth at 10am to 4pm.
- Apply sunblock or protective sunscreen before going out under the sun.
- Shield your skin from UV rays by covering up with clothing, umbrella, or hats.
- Protect the eyes by wearing sunglasses when expose to the sun.
- Listen to weather forecasts and take note of the UV index.
- Drink a lot of water.
Measures the strength of ultraviolet (UV) radiation from the sun at a particular place and time.
UV index or ultraviolet index
True or False: Water refreshes you and prevents dehydration.
True
