Why Dinosaurs Disappeared – Teacher Answers

Teacher answer key

1. Warm-up: answers will vary.
2. Vocabulary: asteroid = a rocky object that moves around the Sun; impact = a powerful collision; atmosphere = the gases surrounding Earth; disrupted = interrupted or disturbed; extinction = the complete disappearance of a species
3. Reading comprehension: 1) About 66 million years ago. 2) Near the Yucatán Peninsula in Mexico. 3) It was reduced. 4) Large volcanic eruptions in India. 5) All non-avian dinosaurs.
4. Grammar: 1) because of; 2) therefore / as a result; 3) because of; 4) As a result / Therefore
5. Listening script: “The impact site is linked with a huge buried crater called Chicxulub. Scientists study rocks from the period for evidence such as unusual levels of iridium, shocked minerals and layers of material thrown out by the impact.”
   Answers: 1) Chicxulub. 2) Rocks from the period. 3) Iridium, shocked minerals, or impact material. 4) The asteroid impact.
6. Speaking: answers will vary.
7. Something fun: answers will vary.
8. Writing: answers will vary. Encourage students to use details from the lesson and accurate target language.

Puzzle/Game: answers will vary. Encourage students to use lesson vocabulary and explain their choices.

Success criteria: this is a student self-check. No single answer is required.

For open-ended tasks, accept different answers when students can explain or support them clearly.