7th Grade Science Unit 1 Review

12. Which class of matter is the least evenly mixed?

15. What is the Atomic Number of an atom that has 2 electrons, 3 protons, and 4 neutrons?

6. __________________ is a description of how close a measurement is.

11. What kind of matter might contain only this type of particle?

28. Which is a renewable energy resource that is used to produce electricity?

24. Which can cause the force of gravity between two objects to increase?

7. A ____________________ is any factor in an experiment that can have more than one value.

25. Which could be the net force acting on an object when the forces are balanced?

22. Which is a contact force?

2. _______________ is a statement of what will happen next in a sequence of events.

23. Which would be used to calculate an object's acceleration?

17. Which is true when an ice cube melts?

3. The practical use of scientific knowledge. especially for industrial and commercial use is known as?

4. ______________________ theory is an explanation of observations.

10. Who was the first to invent Diesel?

16. Which describes the particles in a substance with no definite volume or shape?

9. What is known as CO2?

14. How could you separate a mixture of stone and wooden beads that are all the same size?

8. What are microscopic organisms that live in marine or freshwater environments?

27. Which describes the sum of potential energy and kinetic energy of objects or systems?

5. A ____________________ is a spoken or written summary of observations.

21. Which is a result of an object's motion?

1. The investigation and exploration of natural events is known as?

30. Which form of energy relies on gravitational potential energy?