1. How does light travel? a. In a curve line bin a straight line c. in a zigzag line d. in all kinds of line B 2. You put a metal spoon in hot water in a glass after few minutes the spoon heated. Describe how heat travel? The hot water from the bottom of the glass rises. b. The metal spoon has a direct contact in hot water so it's heated. c. The heated air from hot water expands and transfer to metal spoon. d. The metal spoon has an indirect contact in hot water so it's heated. 3. What happens when you step out of your classroom and stay under the sun? a. You feel the radiant heat coming from the sun. b. You feel the excitement of going outside. c. You feel cold d. The heat coming from the sun is unnoticeable. 4. How does heat travel by convection? a. When liquid or gas is heated, the molecules of the heated part move faster and away from each other. Warm liquid rises and cold liquid sinks. b. When liquid or gas is heated, the molecules move slowly. Warm liquid sinks and cold liquid rises. C. When the heat travels across an empty space. d. When heat transfers to or from a substance through direct contact. 5. How does sound travel in solid material? a. The particles are closer together so the sound wave travels more easily b. The particles are farther apart so the sound wave doesn't travel fast. c. Sound waves tend to move a little less quickly and bounce back less easily. d. The particles are farther apart so the sound waves travel more easily​