Q: Answer the question

Which of these indicates a physical change that occurs during the process of digestion?

A: the squeezing of food through the intestines

Q: Answer the question

Mr. Jenkins constructed a circuit consisting of a variable source, wires, and a resistor. In order to triple the amount of current, how should he change the voltage of the source?

A: make the voltage three times larger

Q: Answer the question

Which piece of lab equipment is necessary to determine the mass of 2 teaspoons of sand?

A:
balance