second term exam for 2nd year sc stream

Activity 1: Put the verbs in brackets into their correct form.
1. If you (to throw) a piece of wood into a pond or a pool, it (to float).
……………………………………………………………………………….
2. If we (not hurry), we (to arrive) late to our meeting.
……………………………………………………………………………….
3. UV rays (to penetrate) oceans if the marine life (to damage) by chemicals.
………………………………………………………………………………..
4. Phosphorus (to burn) when you expose it to air.
………………………………………………………………………………..

Activity2: Put the following sentences into active or passive.
1. Rain has been polluted by acids.
………………………………………………………………………..
2. Acid rain poisons water, kills fish and destroys trees and crops.
…………………………………………………………………………….
3. Chlorine attacks the ozone molecules.
…………………………………………………………………………….
4. There will be dangerous diseases if we don’t fight pollution.
…………………………………………………………………………….

Activity 3: Form the adjectives of the following words by adding the appropriate suffixes.

-appreciate →……………….. –attract →……………………..
-favour→……………………. –operation→……………………
-technology→………………….. – profit →……………………….
-real →……………………. – essence →…………………….

Activity 4: Mark the stress on the following words.
- Chemicals
- Pathology
- Scientific
- Protection
- Possibility
- Understand
- Report (n)
- Report (v)

thanks