1. Which part of the plant usually attracts insects?

2. The changing of a liquid into gas is known as

3. When water evaporates from the earth's surface, the vapour condenses in the sky to form _________.

4. A reflection in a mirror is called _________

5. The three states of matter are:

6. Light travels ____________in just one second.

7. The _________ period of an animal is the time from fertilization of egg to the birth of offspring.

8. The boiling point of water is ______°c

9. Seeds germinate into a ________.

10. Which of these is essential for germination?

11. A material that allows all light to pass through is _________.

12. ________________observed that a thin beam of sunlight hitting a glass prism at an angle creates a visible band of colours.

13. Why do shadows change length during the day?

14. Explain how we see things? We see things when ___________.

15. The best material to block light and casts a shadow is ___________.

16. ___________ materials let no light through.

17. ___________mirrors are curved outward, like the outside of a dome.

18. _________ is earth's main source of light.

19. Two things seeds need to germinate are ________________.

20. Brightness of light is measured in lux with a _________.

21. _______________ is the closed path of water from cloud to rain.

22. What happens when light shines on polished, smooth or shiny surfaces?

23. Insects go from the egg to larva to _______ to adult in their life cycle.

24. Which of these materials is transparent?

25. Which of these materials is opaque?

26. Which of these materials is translucent?

27. How long does it take sunlight to reach us on earth?

28. ____________________cells at the back of your eyes receive the light and send messages to your brain.

29. One artificial source of light is ______.

30. Which of the following is not a stage in the life cycle of a flowering plant?