Jamal lives in a place where it is hot in the summer and cold in winter. His family decided to improve the insulation in their house. Infer what happened to the cost of heating and cooling their house. Explain why?

Which best describes the direction of heat? 1) from a substance with no thermal energy to a substance with high amounts of thermal energy 2) from a substance with less thermal energy to a substance with more thermal energy 3) from a cooler substance

What is the definition of an abiotic factor?

Define: 1. acids, 2. strong acids, 3. weak acids.

Is taking a glass of water and freezing it by placing in the freezer chemical change?

Molar solubility of CuBr Ksp = 6.3 x 10-9

Which of the following is the largest volume? 1.2 x 101 m3 1.2 x 108 cm3 2.0 x 104 dm3 1.2 x 108 mm3

Many substances can go through physical and chemical changes. Which of the following is an example of a physical change?

Which contains more molecules: a mole of hydrogen or a mole of chlorine

How are sex chromosomes different from other chromosomes

If we place the like poles of two magnets facing each other what will happen? A. Nothing B. They will both become negative. C. They will attract each other. D. They will repel each other.