Physical Science Chapters 1-7

3. a form of matter that does not have a definite volume or shape
6. a force of attraction between objects that is due to their masses
7. a force that opposes motion between two surfaces that are in contact
8. a push or a pull exerted on an object in order to change the motion of the object
10. the pushing or pulling force exerted by the engine of an aircraft
12. a force parallel to the velocity of the flow
13. a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept
16. the amount of force exerted per unit area of a surface
17. a substance that cannot be separated or broken down into simpler substances by chemical means
18. the state of matter that has a definite volume but not a definite shape
19. a quantity defined as the product of the mass and velocity of an object

1. anything that has mass and takes up space
2. an object's change in position relative to a reference point
4. an upward force on an object that moves in a fluid
5. the state of matter in which the volume and shape of a substance are fixed
9. a substance made up of atoms of two or more different elements joined by chemical bonds
10. an explanation that ties together many hypotheses and observations
11. a summary of many experimental results and observations
14. the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the object
15. the process in which a solid changes directly into a gas