Answer:
True
Explanation:
When we use sterilized containers for storing preserves and it must have air tight covers because the cover protect the preserve from the contact of oxygen, moisture and other environmental components that can degrade or spoil the preserve.
Better sealing of the containers keeps the preserve fresh and protect from reaction with environmental factors.
Hence, the given statement is "true."
Air pollution can negatively affect climate and health.
Answer:
The difference between a radio wave and X- ray is that Radio waves have a much longer wavelength when it's in visible light. x-rays have a smaller wavelength and higher frequency compared to visible light.
Explanation:
During an asthma attack the muscle wall contracts and the lining of the airways becomes swollen and inflamed. These changes cause a narrowing of the airways which is further aggravated by an increase in secretions from the mucus membrane, which may actually block the smaller airways hope this helps
The correct answer is A, experiencing tiredness,sneezing and headache. this is because these are symptoms of infectious disease which can be passed on to co-workers
