instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Momentum is a vector quantity that has the same direction as the velocity of the object. Answer: object ' s velocity
answer:
Momentum is a vector quantity that has the same direction as what?

question:
Passage: Note Organic and biochemical equations are frequently written showing only the organic reactants and products. In this way, we focus attention on the organic starting material and product, rather than on balancing complicated equations. Ethanol is oxidized in the liver to acetaldehyde:. Answer: products
answer:
Organic and biochemical equations show the initial and final products of the equation, respectively known as the reactants and what else?

question:
Passage: You might have noticed that plants bend toward the light. This is an example of a tropism where light is the stimulus, known as phototropism ( Figure below ). To obtain more light for photosynthesis, leaves and stems grow toward the light. On the other hand, roots grow away from light. This is beneficial for the roots, because they need to obtain water and nutrients from deep within the ground. Answer: phototropism
answer:
A tropism where light is the stimulus is known as what?