Plants and animals are put into different categories on the basis of Mode of nutrition. Plants are autotrophs, while animals are heterotrophs. Cell wall is present in plant cells, while it is absent in animal cells. Also, locomotion, absence of chloroplasts etc. make them different. Plants do not need to move from one place to another, while most of the animals need to move in search of food.

1. Solids have a definite shape and a definite volume because the particles are locked into place.
2. Solids do not flow easily because the particles cannot move/slide past one another.
3. Solids are not easily compressiblebecause there is little free space between particles .

At room temperature (25°C), water is a liquid because it has the following characteristics of liquid:

1. At room temperature, water has no shape but has a fixed volume i.e., it occupies the shape of the container in which it is kept.
2. At room temperature, water flows easily.

Pressure has no effect on solid and liquid whereas the volume of gas decrease with increase in pressure. This leads to the conversion of the gaseous state into a liquid state and eventually into a solid state.
The volume of the gas decreases on applying pressure on gases because gases are compressible.

To calculate instantaneous speed, we need to divide part of the total distance traveled by time. However, we don't want to use the distance of the entire trip, because that will give us average speed. Instantaneous speed is the exact speed that a body is moving at, at a given instant in time. It is a true measure of the body's motion for that point in time. An average speed tells you how much distance a body covers during a certain time span, but it does not tell you much about the actual motion that occurred.

Chromatin is a substance within a chromosome consisting of DNA and protein. The DNA carries the cell's genetic instructions. The major proteins in chromatin are histones, which help package the DNA in a compact form that fits in the cell nucleus. Chromatin is a complex of DNA and protein found in eukaryotic cells. Its primary function is packaging long DNA molecules into more compact, denser structures.

The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system. The human heart works like a pump sending blood around your body to keep you alive. This blood delivers oxygen and nutrients to all parts of your body, and carries away unwanted carbon dioxide and waste products.

The nucleus of an atom is the central region of an atom where the majority of the mass is concentrated. The Nucleus of an atom consists of a tightly packed arrangement of protons and neutrons. These are the two heavy particles in an atom and hence 99.9% of the mass is concentrated in the nucleus. 

Diffusion is the movement of particles down their concentration gradient, meaning they flow from places of high concentration to places of low concentration. ... The two main types of diffusion are passive diffusion and facilitated diffusion. The two main types of osmosis are regular osmosis and chemiosmosis. The three main types of this phenomenon are expansion diffusion, stimulus diffusion, and relocation diffusion.

The SER appears smooth uner microscope due to absence of ribosomes. It also manufactures fat molecules or lipids that are important for proper functioning of cell and detoxyfies the poisons present in liver cells of vertebrates.

• The Solid State:

Properties of solids:

1. Solids have a fixed shape and a fixed volume.
2. Solids cannot be compressed much.
3. Solids have high densities. They are heavy.
4. Solids do not fill their container completely.
5. Solids do not flow.

• The Liquid State:

Properties of liquids:

1. Liquids have a fixed volume but they have no fixed shape.
2. Like solids, liquids cannot be compressed much.
3. Liquids have moderate to high densities. They are usually less dense than solids.
4. They do not fill their container completely.
5. They generally flow easily.

The aquatic animals can breathe under water due to the presence of dissolved oxygen in water. Thus, we may conclude that solids, liquids and gases can diffuse into liquids. The rate of diffusion of liquids is higher than that of solids. This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.

• The Gaseous State:

Properties of gases:

1. Gases have neither a fixed shape nor a fixed volume.
2. They can be compressed easily.
3. They have low densities.
4. They fill their container completely.
5. They flow easily.

Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

We know that phase changes occur when materials change state, going from liquid to solid (as when water freezes), solid to liquid (as when rocks melt into lava), liquid to gas (as when you boil water for tea), and so on. When the material in question changes to a new state — liquid, solid, or gas — some heat goes into or comes out of the process without changing the temperature. You can even have solids that turn directly into gas. As dry ice gets warmer, it turns into carbon dioxide gas. This process is called sublimation. Imagine you’re calmly drinking your lemonade at an outdoor garden party. You grab some ice to cool your lemonade, and the mixture in your glass is now half ice, half lemonade (which you can assume has the same specific heat as water), with a temperature of exactly 0 degrees Celsius.

We know that phase changes occur when materials change state, going from liquid to solid (as when water freezes), solid to liquid (as when rocks melt into lava), liquid to gas (as when you boil water for tea), and so on. When the material in question changes to a new state — liquid, solid, or gas — some heat goes into or comes out of the process without changing the temperature. You can even have solids that turn directly into gas. As dry ice gets warmer, it turns into carbon dioxide gas. This process is called sublimation. Imagine you’re calmly drinking your lemonade at an outdoor garden party. You grab some ice to cool your lemonade, and the mixture in your glass is now half ice, half lemonade (which you can assume has the same specific heat as water), with a temperature of exactly 0 degrees Celsius.

Animal cells are generally smaller than plant cells.  Another defining characteristic is its irregular shape. This is due to the absence of a cell wall. But animal cells share other cellular organelles with plant cells as both have evolved from eukaryotic cells.

Health is the level of functional and metabolicefficiency of a living organism. In humans it is the ability of individuals or communities to adapt and self-manage when facing physical, mental, psychological and social changes with environment. The World Health Organization (WHO) defined health in its broader sense in its 1948 constitution as "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity."This definition has been subject to controversy, in particular as lacking operational value, the ambiguity in developing cohesive health strategies, and because of the problem created by use of the word "complete". Other definitions have been proposed, among which a recent definition that correlates health and personal satisfaction. Classification systems such as the WHO Family of International Classifications, including the International Classification of Functioning, Disability and Health (ICF) and the International Classification of Diseases (ICD), are commonly used to define and measure the components of health.

Important to establish to types of health; physical and mental health. Mental health refers to a persons psychological well-being and how they feel. Physical health has many different components such as physical activity, nutrition and diet and sleep/rest. Physical health can have a major impact on mental health and vice versa.

Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis. Another adaptation that they have is root hair cells have a large permanent vacuole. Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient. Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption.

The basic principle behind the working of an air cooler is evaporative cooling. As on a hot, dry day, the temperature is high and humidity is low, the evaporation rate is higher. The water takes energy from the air and gets converted to vapour. This makes the air cooler.