Across
- 2. - Substances that start a chemical reaction.
- 5. - The rate of change of velocity per unit of time. It can involve an increase or decrease in speed and/or a change in direction.
- 7. - The reaction between an acid and a base to form water and a salt.
- 9. - The speed of an object in a specific direction. It is a vector quantity and includes both magnitude and direction.
- 10. Reactions - Processes that involve the rearrangement of atoms to form new substances.
- 11. - Groups of atoms bonded together, representing the smallest fundamental unit of a chemical compound.
- 12. - Substances formed when two or more elements are chemically bonded together.
- 14. - The basic units of matter.
- 16. Scale - A measure of how acidic or basic a solution is, ranging from 0 to 14.
- 17. - An influence that can change the motion of an object or produce motion in a stationary object. It is measured in newtons (N).
- 18. - Pure substances consisting of only one type of atom.
- 19. - Substances that are produced by a chemical reaction.
Down
- 1. - The force that opposes the motion of an object when it is in contact with another surface. It can slow down or stop the movement of objects.
- 3. - Substances that release hydroxide ions (OH⁻) in solution and have a pH greater than 7.
- 4. - A combination of two or more substances that are not chemically bonded.
- 6. - Substances that change color in response to a change in pH.
- 8. - Substances that release hydrogen ions (H⁺) in solution and have a pH less than 7.
- 13. Table - A chart that organizes all known elements by their properties.
- 15. - The distance traveled per unit of time. It is a scalar quantity and is usually measured in meters per second (m/s).