Answer the following question given this paragraph: A solution is a homogeneous mixture with tiny particles. An example is salt water. The particles of a solution are too small to reflect light. As a result, you cannot see them. That's why salt water looks the same as pure water. The particles of solutions are also too small to settle or be filtered out of the mixture. Q: A homogeneous mixture with tiny particles in it is known as what? Choices: - element - plasmid - structure - solution A:
solution

Answer the following question given this paragraph: If you look at your hand, what do you see? Of course, you see skin, which consists of cells. But what are skin cells made of? Like all living cells, they are made of matter. In fact, all things are made of matter. Matter is anything that takes up space and has mass. Matter, in turn, is made up of chemical substances. In this lesson you will learn about the chemical substances that make up living things. Q: What term is used to describe anything that takes up space and has mass? Choices: - size - weight - opacity - matter A:
matter

Answer the following question given this paragraph: Many circuits have switches to control the flow of current through the circuit. When the switch is turned on, the circuit is closed and current can flow through it. When the switch is turned off, the circuit is open and current cannot flow through it. Q: A switch in a circuit controls the flow of what, specifically, within the circuit? Choices: - pressure - resistance - density - current A:
current