Answer:shale
Explanation: pressure compacts the shale into slate, and heat hardens it
1) the pressure of the hydrogen gas increases and the gas reaches extreme temperatures
2) bare nuclei collide with each other due to massive amounts of heat
3) the colliding neuclei fuse to form larger helium atoms having two protons and two neutrons
4) hydrogen atoms shed their electrons
This could be wrong so don't fully trust this answer
In simple terms, chlorophyll makes a leaf look green because it reflects only green light.
Answering in a more detailed fashion, chlorophyll is a pigment. As a pigment it absorbs some wavelengths of visible light, (red, orange, yellow, green, blue, indigo, and violet are the colors of visible light), while reflecting others. In specific, chlorophyll absorbs all other colors of light but green, which it reflects. It is this reflection of green light that cause a leaf to appear green.
