Water waves pass from deep into the shallow region and are then refracted. The characteristics of waves which will remain constant is _____...?
(A) Direction
(B) Frequency
(C) Speed
(D) Wavelength
✅ Correct Answer:Frequency
Comments
Water waves pass from deep into the shallow region and are then refracted. The characteristics of waves which will remain constant is _____...?
The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________...?
(A) 1120 ft
(B) 120 ft
(C) 56 ft
(D) 100 ft
✅ Correct Answer:56 ft
Comments
The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________...?
Earth is closest to the sun every year in early ______________, when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early __________________, during our Northern Hemisphere summer....?
(A) January – July
(B) June – December
(C) July – January
(D) December – June
✅ Correct Answer:January – July
Comments
Earth is closest to the sun every year in early ______________, when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early __________________, during our Northern Hemisphere summer....?
The atmosphere near the earth’s surface is “heated from below.” Which of the following does not significantly contribute to this heating _____________________...?
(A) Conduction of heat upward from a hot surface
(B) Convection from a hot surface
(C) Absorption of infrared energy that has been radiated from the surface
(D) Heat energy from the earth’s interior
✅ Correct Answer:Heat energy from the earth’s interior
Comments
The atmosphere near the earth’s surface is “heated from below.” Which of the following does not significantly contribute to this heating _____________________...?