Question

7- Answer the following questions :-
(a) Name the components of Air.
(b) Write the properties of air.
(c) How is soil formed ?
(d) What are rocks?
(e) Write a short note on the skin.
(f) What are the benefits of regular exercise
(g) Why do we need rest ?
(h) What are Muscles ?
(i) Explain the Pivot Joint.
Write a short note on the Ribcage.​

Answer 1

Explanation:

1) Answer - Air is composed of nitrogen, oxygen, carbon dioxide, many other gases, water vapour and dust particles.

2) Answer - Air takes up space. It's made up of atoms and molecules. ...

Air is made of gases, including nitrogen, oxygen, water vapor, and other materials. These substances are what give air mass.

Air exerts pressure. ...

Air has weight. ...

Air can be compressed. ...

Air is affected by temperature.

3) Answer - Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.

4) Answer - A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. Rocks are usually grouped into three main groups: igneous rocks, metamorphic rocks and sedimentary rocks.

5) Answer - Skin: The body's outer covering, which protects against heat and light, injury, and infection. Skin regulates body temperature and stores water, fat, and vitamin D. The skin, which weighs about 6 pounds, is the body's largest organ. It is made up of two main layers: the epidermis and the dermis.

6) Answer - Benefits of Physical Activity

Immediate Benefits.

Weight Management.

Reduce Your Health Risk.

Strengthen Your Bones and Muscles.

Improve Your Ability to do Daily Activities and Prevent Falls

7) Answer - Increase Your Chances of Living LongerIt's necessary for our health and for being at our best when we are working. Rest has been shown to improve cardiovascular health, and lower blood pressure and cortisol levels. Vacation in particular has also been shown to reduce the risk of heart disease, and increase lifespan.

8) Answer - Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and motion.

Answer 2

Explanation:

A) air is the mixture of gases 78% nitrogen and 21% oxygen with traces of water vapour , carbon dioxide , argon and various other components we usually model air as a uniform gas with properties that are averaged from all the individual components

B) Air takes up space it made up of atoms and molecules

Air is made of gases including nitrogen , oxygen , water vapour and other material these substances are what give are give air mases

Air exerts pressure

Air has weight

Air can be compressed

Air is affected by temperature

C) Soil minerals form the basis of soil they are produced from rocks through the process of weathering and natural erosion water , wind , temperature change , gravity chemical , interaction , living organisms and pressure differences all help breakdown parent material

D) A rock is any natural occuring solid mass or aggregate of minerals or mineraloid water it is categorised by the minerals included its chemical compositions and the way in which it is formed