Q: When does coal release most of its energy? Choices: - when forming - when compressed - when falling - when burning A:
when burning

Q: Change in what equals the average net external force multiplied by the time this force acts? Choices: - lag - height - rate - momentum A:
momentum

Q: Q: What is the logarithmic scale that measures the largest jolt of energy released by an earthquake called? Choices: - Shake scale - Geiger counter - tremor scale - richter scale A:
A: richter scale

Question: Q: A bicycle is an example of a compound machine made of many what? Choices: - linked machines - useful machines - interchangeable machines - simple machines A:
Answer: simple machines

*Question*
Q: What shapes, supports, and protects the cell? Choices: - the epithelium - the mesothelium - the chloroplast - the cell wall A:
**Answer**
the cell wall

*Question*
Q: Which process involves solvent separation on a solid medium? Choices: - substration - resonance - affinity - chromatography A:
**Answer**
chromatography