Volume and Pitch
When amplitude is increased, what happens to loudness?
Increases
The effect that is produced when the waves meet each other
Interference
What planet is closest in size to Theia?
Mars
nebula
What is the top layer of Earth?
The top of the wave is called
peak
Two waves of similar amplitude and frequency met, what kind of interference happened?
reinforce
Arrange the collision theory of moon formation:
A - Rocks and dust come together to form the Moon
B - Theia approached Earth
C - Rocks and dust breakaway from Earth and Theia
D - Theia impacted Earth
B, D, C, A
This is where stars are formed.
Stellar nursery
The hottest layer of the Earth is ...
Inner core
When frequency is changed, the _______ changes
pitch
This interference will result in no sound being heard.
Two sound waves cancel
One evidence that supports collision theory is the density. What is the density of Moon compared to Earth?
Moon is less dense
In which hemisphere will you see the Orion nebula?
Northern hemisphere
What cause the movement of the tectonic plates?
Convection current in the mantle due to thermal energy from the core
A wave has a frequency of 1000 Hz, how many complete vibrations does it have every seconds?
1000
Wave X has a frequency of 450 Hz and amplitude of 2mm. It meets another wave Y and no sound is heard. What is the frequency and amplitude of wave Y?
450 Hz, 2mm (opposite)
Give one evidence that supports collision theory except density
Samples of rock from the Moon is molten
Moon has small iron core
Rings of rock and dust is caused by collision outside solar system
Composition of rocks on Earth and Moon are same
What nebula can be seen in the Southern hemisphere?
Carina
One evidence of tectonic plates can be compared to jigsaw puzzle. What is this evidence?
Continental coasts fit together
Instrument that displays waveforms of soundwaves
Oscilloscope
Initially, two waves have a 300 Hz of frequency and 1 mm amplitude. What will be its frequency and amplitude after they meet?
300 Hz; 2mm amplitude
Give one evidence that contradicts collision theory
Surface of Earth is not molten
Venus has no moon
Composition of Moon is more similar to Earth
What is the element mostly found in nebulae?
Hydrogen
Give evidence of tectonic plate theory
Continental coast fit together
Fossil record
More earthquakes and volcanoes at tectonic plate boundaries