The relationship that exists between the ideas in this sentence is a temporal relationship. The sentence indicates that the children spent an hour in the reptile house before moving on to the aviary, suggesting that the activities occurred consecutively in time.
The relationship between the ideas in this sentence is a sequence or chronological order. The sentence indicates that before the children went to the aviary, they first spent an hour in the reptile house.
The relationship between the ideas in this sentence is a temporal relationship. It states that before the children moved on to the aviary, they spent an hour in the reptile house.
