Explanation

• Stomata are small openings on the surface of leaves that allow for gas exchange.
• Including the release of water vapor (transpiration) and the entry of carbon dioxide.
• This process is essential for photosynthesis and regulation of water balance in plants.

Explanation

• Navigation satellites are used for identifying the location of objects on Earth.
• Example: GPS (Global Positioning System) for navigation.

Explanation

• Comets are the small broken pieces of ice, dust, and gases found beyond the orbits of Neptune and Pluto in the solar system.
• Comets originate from regions such as the Kuiper Belt and the Oort Cloud, where they are composed of volatile substances like ice and dust.

Explanation

• A mirror with a reflecting surface that bulges outwards, like the back side of a spoon, is called a Convex Mirror.
• This type of mirror is used in applications such as security mirrors, rear-view mirrors, and surveillance mirrors, as it provides a wider field of view.

Explanation

• Filtration is a process used to separate insoluble solids from a mixture by passing the mixture through a filter.
• Which traps the solids and allows the liquid to pass through.

Explanation

• The flash of light from lightning is a form of electromagnetic radiation, and as such, it travels at the speed of light.
• It is denoted by the letter c.

It is equal to:

• 3 x 10^8 meters per second (m/s) in scientific notation
• 300,000 kilometers per second (km/s) in metric units
• 186,282 miles per second (mi/s) in imperial units

Explanation

• Suspensions are heterogeneous mixtures that contain particles that are visible to the naked eye and settle out of the mixture over time.
• This is in contrast to solutions, which are homogeneous mixtures that contain dissolved particles that are not visible and do not settle out.

Explanation

• Carbon dioxide (CO2) is a greenhouse gas that plays a significant role in the Earth's greenhouse effect.
• It traps heat radiated from the Earth's surface, maintaining the Earth's temperature and keeping it warm enough to support life.
• Other greenhouse gases include methane (CH4), water vapor (H2O), and nitrous oxide (N2O).

Explanation

• The old name of Nitrogen is Azote.
• This name, derived from the Greek word "azotikos" meaning "no life".
• It was given because nitrogen gas does not support respiration, making it inert or "lifeless" in this context.

Explanation

• The speed of sound is minimum in gases because the particles are farthest apart, resulting in a slower transmission of vibrations.
• In gases, the speed of sound is approximately 343 meters per second at room temperature and atmospheric pressure.