Match the humidities with their description.

1. reading with the most water in the air.
2. reading with 80% water in the air.
3. reading that shows the air could hold 80% more water.
4. reading with the lowest amount of water in the air.
a. humidity of 20%
b. humidity of 10%
c. humidity of 90%
d. humidity of 80%

What is the most common reason for matter changing its state?

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.