*Question*
Q: "direct" and "alternating" are two kinds of what, which is associated with electricity? Choices: - time - constant - levels - current A:
**Answer**
current

*Question*
Q: What type of ionic compound is formed from acid and bases reacting with each other? Choices: - isolated - common - dry - salt A:
**Answer**
salt

*Question*
Q: What is the layer above the troposphere? Choices: - thermosphere - mesosphere - troposphere - stratosphere A:
**Answer**
stratosphere

*Question*
Q: Triceps and biceps muscles in the upper arm are an example of what type of muscle relationship? Choices: - synchronized - symbiotic - competitive - opposing A:
**Answer**
opposing