Activity B

Complete the missing information in the sentence definitions below with your own ideas.

1. Photosynthesis is _________________ by which a plant uses carbon dioxide from the air, water from the ground, and the energy from the light of the sun to produce its own food and oxygen.
   
   
2. Momentum is the force that _________________________________________________.
   
   
3. A _________________ is a machine used to rub or press something until it becomes a powder.
   
   
4. A retina is ________________ at the back of the eye that receives light and sends pictures of what the eye sees to the brain.
   
   
5. Aluminium is a light, silver-coloured metal which __________________________________________.
   

Source: https://dictionary.cambridge.org/