Why is it harder to breathe when climbing up a high mountain? (1 point)
• The air compresses the lungs.
• The air has more moisture.
• The air pressure increases.
• The air is thinner.
The correct answer is:
• The air is thinner.
At higher altitudes, the air pressure decreases, making the air thinner. This means there is less oxygen available for the body to take in, resulting in difficulty breathing and lower oxygen saturation levels in the blood.
Which statement correctly describes the mesosphere? (1 point)
• Commercial airplanes fly through this layer.
• The Northern Lights are visible in this layer.
• Atmospheric changes in this layer cause weather at Earth's surface.
• Meteors burn up in this layer to create shooting stars.
The correct statement is:
• Meteors burn up in this layer to create shooting stars.
The mesosphere is the layer of Earth's atmosphere that extends from about 50 to 85 kilometers (31 to 53 miles) above the Earth's surface. It is the layer where most meteoroids burn up upon entering Earth's atmosphere, creating shooting stars.
Use the scenario to answer the question.
A student is examining scientific evidence to support the following claim.
"Life is possible because of the unique mixture of gases that cycle through the Earth's spheres."
Which evidence best supports the student's claim?
(1 point).
O an illustration demonstrating how the depletion of the ozone layer is not blocking out the sun's ultraviolet rays
O a diagram illustrating how plants use carbon dioxide, water, and sunlight to produce food and oxygen gas
• a photograph capturing a nighttime meteor shower
• a timeline detailing when an erupting volcano releases lava, ash, and gases
The evidence that best supports the student's claim is:
• a diagram illustrating how plants use carbon dioxide, water, and sunlight to produce food and oxygen gas
This evidence demonstrates the important role of the cycling of gases, specifically carbon dioxide and oxygen, in supporting life on Earth through photosynthesis by plants.
Which question can best be answered by studying a diagram of the carbon cycle? (1 point)
• How are fossil fuels processed and used to power industries?
• How are fossil fuels formed from the decay of dead plants and animals in the biosphere?
• How does the process of transpiration cause plants to release water through their leaves?
• How is surface water, underground water, and moisture in the atmosphere recycled?
The question that can best be answered by studying a diagram of the carbon cycle is:
• How is surface water, underground water, and moisture in the atmosphere recycled?
Studying the carbon cycle diagram can provide insights into how carbon, in various forms, moves through different parts of the Earth system, including the atmosphere, biosphere, hydrosphere, and geosphere. This understanding can help in deciphering the processes involved in the recycling of water through different reservoirs on Earth.