New Activity
Ico create Educaplay New Activity
All the activities
Play Froggy Jumps
1. What is meant by wavelength?
A
the distance from one point on a wave to the same point on the next wave
B
the distance from crest to trough on a wave
C
the number of waves passing a given point per second
2. What happens to wavelength when energy increases?
A
it decreases
B
it increases
C
it is not affectd
3. What color in the visible spectrum has the most energy?
A
red
B
green
C
violet
4. When an electron falls a long distance, it produces waves with ___ wavelengths
A
short
B
long
C
impossible to tell
5. When frequency decreases, wavelength
A
decreases
B
increases
C
doesn't change
6. Light is given off when electrons
A
jump up to higher energy levels
B
fall from higher energy levels to lower ones
C
orbit around the nucleus at high speed
7. What does c stand for in c= lamba x nu
A
temperature
B
the speed of light
C
wavelength
8. What are the units for frequency?
A
m
B
Hz or s
C
Hz or 1/s
9. What is the wavelength if the frequency is 6.9 x 10^19 Hz?
A
2.3 x 10^11 m
B
2.1 x 10^28 m
C
4.3 x 10^-12 m
10. Waves travelling through space are called
A
quanta
B
photons
C
electromagnetic radiation
11. All electromagnetic radiation, in a vacuum, travels at
A
6.626 x 10^-34 m/s
B
3.0 m/s
C
3.0 x 10^8 m/s
12. Packets of light energy are called
A
protons
B
electrons
C
photons
13. Electrons get energized when they are heated, hit with light, or
A
spinning in circles
B
cooled down
C
electrified
14. The lowest part of a wave is called the
A
origin
B
crest
C
trough
15. This color of light is made up of all of the colors of the rainbow
A
white
B
black
C
blue
16. When a heated or electrified gas is passed through a prism, an ___ spectrum is given off
A
emission
B
absorption
C
continuous
17. The color of light depends on two factors
A
wavelength and frequency
B
speed and velocity
C
speed and temperature
18. A specific amount of energy is called a/an
A
quantum
B
bundle
C
emission spectrum
19. Bohr believed that electrons existed in specific ___ around the nucleus
A
energy levels
B
packets
C
wavelengths
20. Elements can be positively identified through the use of
A
microscopes
B
emission spectra
C
flame tests