3. Concrete roads have narrow gaps filled with black asphalt as shown in the picture. What is the reason for this? A. To make the road look safer and more pleasing to see B. To make the sizes of the blocks of concrete equal C. To help sleepy drivers become more alert D. To allow expansion during a hot climate 4. A scientist in a space laboratory drops a drop of red ink on a glass of water. Which illustrates the motion of ink in the water? A. B. C. D.
Answer (1)
Answer:3. D. To allow expansion during a hot climate4. No Illustration shown but the explanation is the ink will diffuse and spread out gradually, mixing with the water.
