Question

Q1 why solid is hard?
Q2 what is particle?
Q3 what is condensation?
Q4 why should we wear cotton clothes?
Q5 what is molecule?
Q6 what is atom?
Q7 what laws of constant motion?
Q8 what is molecular mass?
Q9 what is a unit mass?
Q10 what is mole concept?
Q11 what is tissue?
Q12 how many types of tissue are there?
Q13 what is meristematic tissue where it is present where it is important?
Q14 what is a permanent tissue describe its type?
Q15 what is a stomach describe it and use.
Q16 what is phloem and xylem ? what is its function and uses.
Q17 what is epidermis?
Q18 describe different types of simple permanent tissue?
Q19 what is animal tissue?
Q20 what are the types of animal tissue present?
Q21 what is epithelium tissue? where it is present, what are the types give example of each.
Q22 write the characteristic of epithelium tissue.
Q23 what is the connective tissue where it is use what are their types with example?
Q24 which connective tissue is present around the blood vessels and write their uses?
Q25 which tissue help joining two bones?
Q26 which tissue connect muscles and bones?
Q27 which is muscular tissue what are their uses and how they work?
Q28 which tissue smoothens the join?
Q29 which muscle tissue involunter work
Q30 what is nervous tissue make a structure of neurones describe it's each parts and how single is past
Q31 how wind blows?
Q32 what is water cycle?
Q33 what is Oxygen cycle?
Q34 what is nitrogen cycle?
Q35 what is pollution what are there type?
Q36 what is greenhouse effect?
Q37 what is ozone layer by which it get depleted? Where it is depleted?
Q38 why we need to conserve ozone layer?
Q39 what is air pollution?
Q40 what is resources?
Q41 what is resources what are their types why we need to conserve it?
Q42 draw the structure of muscular tissue?
Q43 draw the structure of the xylem.
Q44 draw the structure of phloem

class 9th science​

Answer 1

Answer:

1. In solids the positions of constituent particles like atoms or molecules or ions are fixed i.e., they are not free to move. They are stationary in their fixed position. They have strong intermolecular or interionic forces of attraction. Hence solids are hard.
2. In the physical sciences, a particle is a small localized object to which can be ascribed several physical or chemical properties such as volume, density or mass
3. small drops of liquid that are formed when warm air touches a cold surface
4. We wear cotton clothes during summer as cotton absorbs sweat from the body, exposing to the atmosphere for easy evaporation. ... Cotton allows better air circulation which helps to absorb and removing body moisture caused by sweat via evaporation.
5. the smallest unit into which a substance can be divided without changing its chemical nature
6. the smallest part into which an element can be divided
7. Every object persists in its state of rest or uniform motion in a straight line until it is compelled to change that state by forces pressed upon it.” 2. ... “At least one concrete thing in our world must constantly be in a state of motion at any given time

I CANNOT ANSWER FULL BECAUSE ITS IS TOO LENGTHY PLZ FOLLOW ME AND WHAT IS YOUR NAME IS EXAM GOING ON THEN TELL I WILL HELP YOU

Answer 2

Answer :

A1 - Solids is hard because of its high attractive force abd inter molecular force.

A2- A particle is a tiny bit of matter that makes up everything in the universe.

A3- Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor.

A4- We wear cotton clothes during summer as cotton absorbs sweat from the body, exposing to the atmosphere for easy evaporation.

A5- A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

A6- Atom, smallest unit into which matter can be divided without the release of electrically charged particles.

A7- Every object persists in its state of rest or uniform motion in a straight line until it is compelled to change that state by forces pressed upon it.

A8- Molecular mass is a number equal to the sum of the atomic masses of the atoms in a molecule.

A9- The SI unit of mass is the kilogram (kg).

A10- The mole concept is a convenient method of expressing the amount of a substance.

A11- A tissue, in biology, is defined as a group of cells that possess a similar structure and perform a specific function.