« previous next »

Author Question: Which of the following is TRUE about Earth's atmosphere? A) It is denser at higher altitudes. B) ... (Read 90 times)

theo

  • Hero Member
  • *****
  • Posts: 698
on: Jul 14, 2018
Which of the following is TRUE about Earth's atmosphere?
 
  A) It is denser at higher altitudes.
  B) It allows gamma rays and X-rays reach the surface.
  C) The ozonosphere and ionosphere shield the surface from harmful radiation.
  D) Variable gases are the dominant gases in the atmosphere.

Question 2

The top of Earth's atmosphere is approximately
 
  A) 3,200 km (1,988 mi) above Earth's surface. B) 2,000 km (1,243 mi) above Earth's surface.
  C) 480 km (300 mi) above Earth's surface. D) 1,000 km (621 mi) above Earth's surface


matt95

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 14, 2018
Answer to Question 1

C

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

The Sun as it appears from the surface of Earth before sunset. The Sun as it appears from the surface of Earth before sunset.
Which of the following statements is true of linkage? Which of the following statements is true of linkage?
In older adults, higher education is related to higher levels of ego development. In older adults, higher education is related to higher levels of ego development.
Composition of the Atmosphere Composition of the Atmosphere
Earth’s Revolution and Rotation Earth’s Revolution and Rotation
Similar Rock Outcrops on Mars and Earth Similar Rock Outcrops on Mars and Earth
Video: Humerus Adduction Animation

For a complete list of videos, visit our video library