Sound
Sound is a (mechanical, not mechanical) and (transverse/longitudinal) wave
Mechanical and longitudinal
What is the major difference between radio waves and microwaves?
Wavelength
What is the difference between relative and absolute dating?
Absolute dating: gives you an exact age
Relative dating: gives you an age comparison, not an exact age
What is the role of the ribosomes?
To make proteins for the cell
Where were french fries invented?
Belgium
How does sound move through the ear?
Enters the outer ear as a wave, is converted by the middle ear to vibrations, inner ear converts vibrations to electrical impulses which is sent along nerves to the brain
What is the speed of light?
300,000,000 m/s
What is the law of superposition?
States that younger rock layers are above older rock layers
What is the molecular formula for hydrogen peroxide?
H2O2
What is the biggest island in the world?
Greenland
Amplitude affects what property of sound? Frequency affects what property of sound?
Amplitude: volume
Frequency: pitch
What is refraction and why does it occur?
Refraction= bending of light
Occurs when light enters a new medium and changes speed
What is seafloor spreading and what type of boundary does it occur at?
At divergent boundary, tectonic plates move away from each other. Magma rises and hardens to form new oceanic crust
What is the only metal to be liquid at room temperature?
Mercury
What is the most populated city in the world?
Shanghai
What instrument displays and analyzes sound waves?
Oscilloscope
What does each of the following things do?
Iris
Pupil
Lens
Retina
Pupil: hole that lets light into the eye
Lens: bends light to hit retina
Retina: converts light into electrical signals for the brain (perception)
What are two different ways to destroy Earth's crust?
Mountain formation and subduction
How old is the universe?
13.8 billion years
How many feet are in a mile?
5,280
What do cilia do in the ear?
Hair cells that line the cochlea, help convert vibrations to electrical signals
Why are gamma rays considered to be a carcinogen?
Since they have such high energy, they can go through almost any materials. They break chemical bonds, so they kill our cells, and can mutate our DNA
Scientists have concluded that the Earth's inner core is a liquid. Since we've never been there, how do they know this? Explain
Study seismic waves. Some seismic waves cannot travel through liquid. Since we see these waves "bounce" off the inner core, we know it's a liquid
What is the equation for cellular respiration?
Glucose + oxygen --> carbon dioxide, water, and energy
What video on youtube has the most views in history?
Despacito