Grade level: 4 – 5th

Skills:  Measurement (Length)

Related environmental issues:  Biodiversity & Deforestation

Area level: Global

Cross River gorillas are critically endangered species, and there are only 200 to 300 Cross River gorillas left in the wild. Their population became smaller because their habitat in forests were destroyed by humans that cleared forests for agriculture and livestock purposes as well as for timbers. Cross River gorillas also have been illegally hunted.

1. When we measured a Cross River gorilla, its height was as shown in the picture. How tall is the Cross River gorilla? Use feet and inches.
2. Kim is 4 feet 9 inches.  How many inches is the Cross River gorilla taller than Kim?

Source:  WWF

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Answer keys

1. 5 feet 2 inches
2. 5 inches (5 feet 2 inches – 4 feet 9 inches = 4 feet 14 inches – 4 feet 9 inches =5 inches)