Aquatic plants and animals get oxygen from

Aquatic plants and animals have adapted to their underwater environment in order to obtain the oxygen they need to survive. They have developed various mechanisms to extract oxygen from the water.

1. Aquatic plants
- Aquatic plants have small pores on the surface of their leaves called stomata. These stomata allow for the exchange of gases between the plant and its surroundings.
- Oxygen dissolved in the water enters the plant through these stomata and is transported to the cells where it is used for respiration.
- Aquatic plants can also absorb oxygen directly from the water through their roots. Oxygen in the water is produced by aquatic plants through the process of photosynthesis.

2. Aquatic animals
- Aquatic animals have developed different methods to extract oxygen from the water.
- Fish, for example, have gills which are specialized organs that extract dissolved oxygen from the water.
- The gills are made up of thin filaments that contain numerous blood vessels. As water flows over the gills, oxygen diffuses from the water into the blood vessels and carbon dioxide diffuses out.
- Other aquatic animals like crustaceans and mollusks have gills or specialized respiratory structures that allow them to extract oxygen from the water.

Presence of water vapor in air

One way to observe the presence of water vapor in the air in our daily lives is through the formation of dew. Dew forms when the temperature of the air drops and reaches the dew point, causing the water vapor in the air to condense into tiny droplets on surfaces such as grass, leaves, or car windshields. This is most commonly observed early in the morning when the air is cooler.

Why it is not advisable to sleep in a closed room with burning wood

Sleeping in a closed room with burning wood can be extremely dangerous due to the following reasons:

1. Carbon monoxide poisoning
- Burning wood produces carbon monoxide, a colorless and odorless gas that is toxic to humans.
- When a room is closed, the carbon monoxide concentration can build up to dangerous levels, leading to carbon monoxide poisoning.
- Carbon monoxide poisoning can cause symptoms such as headache, dizziness, nausea, and even death if the exposure is prolonged or severe.

2. Lack of oxygen
- Burning wood consumes oxygen from the air and replaces it with carbon dioxide.
- In a closed room, the oxygen supply can quickly deplete, leading to a lack of oxygen.
- Lack of oxygen can cause symptoms such as shortness of breath, dizziness, confusion, and can be life-threatening in severe cases.

3. Fire hazard
- Sleeping in a closed room with burning wood increases the risk of a fire hazard.
- If the fire is left unattended or if the wood stove or fireplace is not properly maintained, it can lead to an uncontrolled fire that can cause extensive damage to the room and pose a threat to life.

In conclusion, it is important to avoid sleeping in a closed room with burning wood due to the risk of carbon monoxide poisoning, lack of oxygen, and fire hazards. It is crucial to ensure proper ventilation and safety measures when using wood-burning appliances to prevent any potential dangers.