Science

6. the force that pulls two masses toward each other
7. the action or process of moving or of changing place or position
9. a state or condition of a system or process (such as one of the energy states of an atom) that does not change in time
10. an interval of time during which a sequence of a recurring succession of events or phenomena is completed.
13. an element that takes the solid form of either graphite or diamond
14. how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass).
15. the amount of space the object takes up
17. the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution
18. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
19. the resistance of a material to localised plastic deformation

1. the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now
2. the galaxy that includes the Solar System
3. a huge collection of gas, dust, and billions of stars and their solar systems.
4. The universe is everything. It includes all of space, and all the matter and energy that space contains.
5. a gas that makes up much of the air in Earth's atmosphere.
7. quantitative measure of inertia, a fundamental property of all matter.
8. the physical world that influences the nature
11. the ability of a material to allow heat and electricity to pass through it
12. an action that changes or maintains the motion of a body or object
16. any object in orbit around the Sun whose shape is stable due to its own gravity.