Explanation

The loss of water vapor to the atmosphere through stomata is a passive process, meaning that metabolic energy in the form of ATP is not required for water movement.

The energy driving transpiration is the difference in energy between the water in the soil and the water in the atmosphere.

Explanation

there are different types of wind

1. when there is no wind we say it is calm.
2. a little wind is called a breeze.
3. A strong wind is called Gale
4. Hurricane is a very strong wind

Explanation

Cigarette smoke and radon are two of the most common indoor hazards.

Most people spend upward of 90% of their time indoors. Without proper ventilation, many pollutants can accumulate indoors.

Explanation

Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun. 

When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets.

Explanation

Gigantic clouds of dust and gas in space are called nebulae

Primarily hydrogen and helium, plus dust (silicates, carbon, ice). 

Occupying the space between stars and acting as a nursery for new stars

Explanation

·         The path of traffic noise can be locked by constructing vertical barriers along the highways.

·         Proper highway planning and design are essential for controlling traffic noise.

·         Establishing lower speed limits for highways also reduced the noise.

Explanation

Answer:

It looks dark to astronauts. On the earth, the blue sky can be seen due to the existence of the atmosphere. The atmosphere blocks the rays of the sun and you can see the color of the sky. In the universe, because there is no atmosphere, the rays reach the astronomer's eyes without refraction and appear dark.

Explanation

Answer:

A

The proportion in the sea is decreasing. Seawater is denser than river water, so ships suffer more damage.

Explanation

Answer:

C

Forests and trees contribute significantly to food security by helping maintain the environmental conditions required for agricultural production. They stabilize the soil, prevent erosion, increase the water storage capacity of the soil, and reduce air temperature and soil temperature.

Explanation

Ozone depletion occurs commonly due to Chlorofluorocarbons

اوزون کی کمی عام طور پر کلورو فلورو کاربن کی وجہ سے ہوتی ہے۔