-- card: 34735 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 4601
-- name: #109
----- HyperTalk script -----
on openCard
  global group,rightone
  put 10 into group
  put "B" into rightone
  pass openCard
end openCard



-- part contents for background part 20
----- text -----
Question #10

-- part contents for background part 1
----- text -----
T3B02  When does ionospheric absorption of radio signals occur?

-- part contents for background part 11
----- text -----
When tropospheric ducting occurs

-- part contents for background part 28
----- text -----
When signals travel to the F region

-- part contents for background part 29
----- text -----
When a temperature inversion occurs

-- part contents for background part 27
----- text -----
When long wavelength signals enter the D region

-- part contents for background part 43
----- text -----
Correct answer is B