Across
- 2. of birds
- 3. a unit of measurement of sound
- 4. protection or a safe place, especially for someone or something being chased or hunted
- 7. an animal that hurts and kills other animals for food
- 8. a connection to something
- 10. the plant is called a ...
- 11. equipment to record sound
- 12. the way living things affect each other and the environment
Down
- 1. related to the sea or sea transport
- 2. the number of times a sound is produced in one second
- 3. a plant or animal that has been produced from two different types of plant or animal, especially to get better characteristics
- 4. a set of animals or plants in which the members have similar characteristics to each other and can breed with each other
- 5. sonar equipment to find out where something is underwater
- 6. a small device to record information about activity
- 9. ... of whales
- 10. very small plants and animals that float on the surface of the sea and on which other sea animals feed