Q: Q: What type of blood vessels carry blood away from the heart? Choices: - Heart - tubes - Viens - arteries A:
A: arteries

Q: Q: A circuit must be what in order for electric devices such as light bulbs to work? Choices: - open - down - cyclical - closed A:
A: closed

Q: Q: When an unstable nucleus emits radiation and is transformed into the nucleus of other elements this is called? Choices: - naturally decay - explosive decay - fusion decay - radioactive decay A:
A: radioactive decay

Q: Q: What do you call reversible changes that do not change matter's chemical makeup or chemical properties? Choices: - potential changes - element changes - chemical changes - physical changes A:
A: physical changes