Across
- 1. the force of gravitational attraction between an object's mass and is resident planet
- 5. physical combination of two or more substances blank can be separated by physical means
- 9. change of state from a liquid to a gas below the boiling point but above the freezing point. blank is a form of vaporization that occurs when particles near the surface of the liquid gain sufficient energy to escape to liquid
- 10. change- a change of one element into another element by changes occurring in the nucleus of the atom blank changes can occur when atoms emit or absorbs rays or particles. It can also occur when atoms occur in nuclear reactions when atoms split apart through fission or join together through fission
- 15. pure substance formed by chemically combining two or more molecules
- 17. change in state from a liquid to a solid caused by removing energy. blank is the opposite of melting
- 18. process of which solid particles drop from a moving fluid to the bottom of the fluid. Blank usually occurs when the flow rate decreases
- 24. charged atom or group of atoms caused by a charge imbalance
- 25. change in a state from a solid directly to a gas caused by adding energy. blank is the opposite of deposition
- 26. two or more chemically bonded atoms. Molecules can be made of just one kind of element or a combination of elements
- 27. the change of state from a solid to a liquid at the melting point that is caused by adding energy blank is the opposite of freezing
- 28. fluid state of matter made of extremely high temperature ionized particles. blank have both a changeable shape and volume. since stars are made of blank it is the most common state of matter in the universe
- 29. substance-a material made of only one kind of element or compound; not a mixture
- 30. a push or pull on an object
Down
- 2. the ability to do work. Blank exists in many forms and can transfer between objects or change form
- 3. hotness or coldness of a substance stated in degrees a measure of the average kinetic energy of the particles of a substance
- 4. the attractive force between any two objects based on their masses. The strength of blank decreases rapidly as the two objects move apart
- 6. that has mass and takes up space; a physical substance-
- 7. pure substance made of only one kind of atom
- 8. change in state from a gas to a liquid caused by removing energy
- 11. rigid state of matter in which the particles align in a fixed arrangement, a blank substance has an unchanging shape and volume
- 12. fluid state of matter in which the particles are free to move but are held close to each other. a blank substance has an unchanging volume but a changeable shape
- 13. of matter- the physical form of matter described by its physical characteristics the state of a pure substance largely depends on its temperate. matter can be a solid, liquid, gas, or plasma. phase of matter is another term for blank.
- 14. measure of the amount of matter in an object
- 16. change- the change from one pure substance to another by the rearrangement of atoms in a chemical reaction. We typically recognize blank changes by a change in color, change in energy, formation of a gas, and/or formation of a solid
- 19. law of thermodynamics-scientific law that states that matter and energy cannot be created or destroyed but can only transfer between objects or transform to a different form
- 20. work is done when a force acts on a moving object in the same or opposite direction of its motion or when energy is transferred from one object to another
- 21. smallest neutral particle of an element that retains the characteristics of that element
- 22. amount of space that an object occupies
- 23. state of matter in which the particles move so fast and are so far apart as to have little interaction with each other. blank have both a changeable shape and volume-the amount of space that an object occupies
- 28. change- a change in matter that doesn't alter its chemical identity. blank includes changes of state, changing shape, polishing, dissolving, etc.