1
lesson pretestMultiple Choice

Pretest

Question 1 • Physical Science

Some snakes have special sensory organs that detect the infrared region of the electromagnetic spectrum. Compared with human vision, these snakes can sense electromagnetic waves that have

Answer
A
a lower frequency and a shorter wavelength.
B
a lower frequency and a longer wavelength.
C
a higher frequency and a shorter wavelength.
D
a higher frequency and a longer wavelength.
Next