School work

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Across
  1. 2. is a device that is used to see great distance and that is a
  2. 4. A ______ is something showing the relation between variable quantities, typically of two variables
  3. 7. a _____ is something that device with a screen for receiving television signals
  4. 8. A ____is used to connect different words
Down
  1. 1. a person or company that sells a product or service by phone that is a _____________
  2. 3. qualified to treat disease or injury which is a ______
  3. 5. a distinct period or stage in a series of events or a process of change or development that is a _____
  4. 6. son of one's brother or sister, or of one's brother-in-law or sister-in-law​ ____