Some plastics are _________, meaning you cannot see through them at all.

Keep practicing — related questions

• Some glass is _________, meaning you can see through it somewhat, but not perfectly.
• Glass is usually _________, meaning you can see through it perfectly.
• Materials that allow light to pass but through which objects cannot be clearly seen are said to be _______
• __________ materials do not allow light to pass through them.
• Glass, cellophane and plastic sheet are examples of __________ objects.
• If you are able to see clearly through an object, it is allowing light to pass through it and is __________.
• _____________ objects allow light to pass through them partially.
• Objects through which we cannot see clearly are called _____.