Science Questions
Explore questions in the Science category that you can ask Spark.E!
In Copernicus' heliocentric model of the solar system, orbits are _____ and the universe is ___
As distance increases, gravitational attraction ___________.
Which of the following has a life cycle-meaning they are born, live and then die?
Helium fusion occurs at temperatures above?
What causes the outward pressure that balances the inward pull of gravity in a star?
What does Earth's hydroshpere represent?
In Kepler's model, the sun is the center point that the planet revolves around.
__________ are starlike objects that contain less than 0.08 solar masses an will never raise their core temperatures to the point that the proton-proton chain can begin. They fall in a gap between the low-mass M dwarf stars and the massive planets.
Emission nebulae are also called __________ because they are composed of ionized hydrogen ?
How many stars are in the Milky Way Galaxy
The average star spends _____ percent of its life time on the main sequence.
The lowest mass object that can initiate thermonuclear fusion of hydrogen has a mass of about ?
How many days does it take Earth to revolve around the sun?
What is the force that keeps the planit orbiting the sun?
what type of celestial body is our sun?
The average star spends what percentage of its life in the protostar stage?
__________ is the thermonuclear fusion of hydrogen to form helium operation in the cores of stars on the main sequence that are more massive than the sun ?
__________ are small luminous nebulae by nearby young stars ?
gravity is the ____ force between any 2 objects
True or False does the sun have a solid surface?