The Population of the Earth at the End of 2018

question 110

Multiple Choice

The population of the Earth at the end of 2018 was approximately 7.7 × 10⁹ people. Which of the following is the correct way of representing this number?

• A) 7,700,000,000 people
• B) 77,000,000,000 people
• C) 77,000,000,000,000 people
• D) none of these

---

Definitions:

Habituation

Decreased responsiveness to a stimulus after repeated presentations.

Contiguous Occurrences

Contiguous occurrences refer to events that happen in close proximity in terms of both time and space.

Contingent Occurrences

Events that happen dependent on certain conditions or situations, often in a causal relationship.

Neutral Stimulus

A neutral stimulus is initially unrelated and unresponsive to any specific response until it becomes associated with a conditioned stimulus in classical conditioning.