Science L.11 Flashcards
(37 cards)
What is the outermost layer of the Earth’s atmosphere?
Exosphere
The exosphere is the outermost layer where the atmosphere transitions into outer space.
What is the layer of the atmosphere where space shuttles orbit?
Thermosphere
The thermosphere is where the ionosphere is located, allowing for radio communication.
What happens to most meteoroids in the mesosphere?
They burn up
Meteoroids that enter the mesosphere are called meteors due to their combustion.
What layer of the atmosphere is closest to the Earth’s surface?
Troposphere
The troposphere contains the gases we breathe and is where all weather phenomena occur.
What is the primary function of the atmosphere in relation to solar radiation?
Absorbs harmful ultraviolet radiation
The atmosphere protects the Earth from cold space by retaining heat energy.
What is the composition of air in terms of nitrogen and oxygen percentages?
78% nitrogen, 21% oxygen
The remaining less than 1% consists of argon, carbon dioxide, and other gases.
What is the role of the atmosphere in the water cycle?
Recycles water
The atmosphere plays a crucial role in maintaining the water cycle on Earth.
True or False: Air is visible and has a distinct color.
False
Air is colorless, tasteless, and odorless.
Fill in the blank: The atmosphere is important for the continuation of life on Earth because it provides _______.
Oxygen
Oxygen is essential for respiration in living organisms.
What is the property of air that allows sound to travel?
Air is the carrier of sound waves
The atmosphere enables communication by allowing sound to propagate.
What is the temperature regulation function of the atmosphere?
Maintains Earth’s temperature by retaining heat
The atmosphere prevents heat from escaping into space, aiding in temperature stability.
What do mountaineers need to carry when climbing high altitudes and why?
Oxygen
Oxygen levels decrease at higher altitudes, necessitating supplemental oxygen for climbers.
What are meteoroids made of when they orbit the Sun?
Rock or iron
Meteoroids are similar to planets and asteroids in composition.
What is the significance of the aurora borealis?
It is a pattern of colored lights seen in the night sky
The aurora borealis occurs primarily in northern regions and is caused by solar wind interactions with the Earth’s atmosphere.
What happens to hot air?
Hot air rises up.
What is the chemical reaction for sodium hydroxide and hydrochloric acid?
HCl + NaOH → NaCl.
What is nitrogen’s role in plant nutrition?
Nitrogen is an important plant nutrient converted by special bacteria in the soil.
Does nitrogen support burning?
No, nitrogen neither burns nor supports burning.
What is the role of oxygen for living things?
Oxygen is needed by living things to breathe.
What happens when a candle is covered with a glass?
The candle stops burning when the oxygen is fully used up.
What gas do plants use during photosynthesis?
Carbon dioxide.
What is neon used for?
Neon gas is used for glowing signboards.
What is argon used to make?
Fluorescent tubes and bulbs.
