Devon knows that there are 3 teaspoons (tsp) in 1 tablespoon (tbsp). his cookie recipe calls for 6 tbsp of honey.

which expressions can be used to find the number of tsp in 6 tbsp?

Answer is: 6 tbsp × 3 tsp / 1 tbsp.

number of tsp (teaspoon) in 6 tbsp (tablespoon) = 6 tbsp × (3 tsp / 1 tbsp).

number of tsp (teaspoon) in 6 tbsp (tablespoon) = 18 tsp (teaspoon).

3 tsp / 1 tbsp, this expression means there are three teaspoons (tsp) in one tablespoon (tbsp), multiply this expression with six tablespoon (6 tbsp) because there are six tablespoons of honey in recipe.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.