The federal Centers for Disease Control in Atlanta recently lowered the threshold of concern for lead levels in children’s blood. Lead levels in blood as low as 10 micrograms of lead per deciliter of blood can result in subtle effects of lead toxicity. What is the lead level expressed in grams of lead per liter of blood?

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary