Chemistry
What is an atom?
The basic building block for all matter in the universe and are extremly small.
Why can't we see the Milky Way Galaxie?
Because earth is in the milky way galaxy.
comets are made of what?
Ice, dust , and water
Are there different types of black holes?
stellar, intermediate, supermassive, and miniature.
what is an electric charge?
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
what is the Hubble law?
the farther a galaxie is from earth the faster it travels.
What is earth?
The third planet from the sun
Why does everything in our galaxy orbit the supermassive black hole at the center?
Because mass causes gravity, and gravity causes orbits, the galactic orbital paths of all objects in the galaxy are caused by the total mass of the galaxy and not the mass of the black hole at the center
the basic unit of a chemical element
Atom
How is a galaxy formed?
gas, dust, and billions of stars and their solar systems
Meteors are small fragments of what?
meteroids
Does sound travel faster in space?
Sound does not travel at all in space
The central part of an atom that contains the protons and neutrons
Nucleus
what are the 3 major types of galaxies?
Spiral, Elliptical, and irregular
when close enough to the sun, solar winds and solar radiation blow what?
Particles
What do all atoms of the same element have in common?
the same number of protons,
Molecules are what?
Two or more atoms connected by a chemical bond
Each type has different characteristics and a different history of evolution
what are meteors called once they have reached the earth?
Meteorite
What holds a galaxy together?
it's all held together by gravity .