Science 8 · Unit 7: Diet and growth · Cambridge Lower Secondary Science Stage 8

Questions

1. 1. Which substance in cigarettes makes smoking addictive?

   • calcium
   • oxygen
   • glucose
   • nicotine
   Check

2. 2. Look at the chart. For which type of disease was death most likely to be caused by smoking?

   • circulatory disease
   • cancer
   • respiratory disease
   • digestive disease
   Check

3. 3. 40% of deaths from respiratory disease in men were caused by smoking. Out of 200 such deaths, how many?

   • 80
   • 160
   • 40
   • 20
   Check

4. 4. 20% of cancer deaths in women were caused by smoking. Out of 500, how many?

   • 100
   • 50
   • 250
   • 20
   Check

5. 5. Look at the chart. Smoking caused a greater percentage of deaths in men than in women. Why might this be?

   • More men than women smoked.
   • Cigarettes affect only men.
   • Women's lungs are stronger.
   • Men never get ill.
   Check

6. 6. Look at the table of smokers in 2016. Which country had the greatest percentage of men smoking?

   • Indonesia
   • Russian Federation
   • Egypt
   • Maldives
   Check

7. 7. Look at the table. Which country had the greatest percentage of women smoking?

   • Indonesia
   • Netherlands
   • Russian Federation
   • Chile
   Check

8. 8. Look at the table. In which country was the difference between men and women smokers biggest?

   • Netherlands
   • Egypt
   • Maldives
   • Indonesia
   Check

9. 9. Why did most people who failed to give up go back to smoking?

   • Their health improved.
   • They could not manage without cigarettes.
   • Their doctor told them to.
   • It was cheap.
   Check

10. 10. How might e-cigarettes help people give up smoking?

    • They are more harmful.
    • They contain no nicotine at all.
    • They make people ill.
    • They supply nicotine with fewer harmful chemicals while the habit is reduced.
    Check

11. 11. Which part of tobacco smoke causes cancer?

    • water vapour
    • nitrogen
    • oxygen
    • tar
    Check

12. 12. Which gas in smoke reduces the oxygen the blood can carry?

    • helium
    • nitrogen
    • carbon monoxide
    • oxygen
    Check

13. 13. Why is it hard to stop smoking when everyone around you smokes?

    • It is illegal to stop.
    • Social pressure and seeing others smoke trigger cravings.
    • Others force you to.
    • Smoke is good for you.
    Check

14. 14. Name one way to keep the body healthy as it grows.

    • avoid all fat forever
    • skip meals
    • eat a balanced diet and exercise regularly
    • smoke occasionally
    Check

15. 15. Look at the chart. For which type of disease was death least likely to be caused by smoking?

    • digestive disease
    • circulatory disease
    • respiratory disease
    • cancer
    Check

16. 16. How is development different from growth?

    • Development only means getting taller.
    • They mean exactly the same.
    • Growth happens only before birth.
    • Development is forming tissues and organs and gaining new skills, not just getting bigger.
    Check

17. 17. How do the particulates in tobacco smoke damage the lungs?

    • They make the heart beat faster.
    • They turn into tar in the blood.
    • They make the lungs grow bigger.
    • They make the walls of the alveoli break down.
    Check

18. 18. How does nicotine damage a smoker's blood vessels?

    • It makes them wider.
    • It makes them narrower, so blood flows less easily.
    • It turns them into tar.
    • It fills them with air.
    Check