When you use a chemical cold pack, you squeeze the room temperature contents together until the mixture becomes very cold. A friend comments that chemical reaction must be “giving off coldness”, so that your hands are "freezing cold". Comment on the validity of this statement given your understanding of thermodynamics.

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Sugar is dissolved in water. which is the solute? sugar neither both water