Home science ensures that both boys and girls get disciplined in the cleanliness practices that are followed on a daily basis at home. Sometimes Indian parents pamper the boys and do not allow them to perform household duties. Home science teaches boys to get involved in the home activities.

Root pressure is caused by active transport of mineral nutrient ions into the root xylem. Without transpiration to carry the ions up the stem, they accumulate in the root xylem and lower the water potential. Water then diffuses from the soil into the root xylem due to osmosis. Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells. Root pressure provides a force, which pushes water up the stem, but it is not enough to account for the movement of water to leaves at the top of the tallest trees.

Transpirational pull is the main phenomenon driving the flow of water in the xylem tissues of large plants.Transpirational pull results ultimately from the evaporation of water from the surfaces of cells in the interior of the leaves. This evaporation causes the surface of the water to pull back into the pores of the cell wall. Inside the pores, the water forms a concave meniscus. The high surface tension of water pulls the concavity outwards, generating enough force to lift water as high as a hundred meters from ground level to a tree's highest branches. Transpirational pull only works because the vessels transporting the water are very small in diameter, otherwise cavitation would break the water column.

A mixture is a combination of two or more substances (elements or compounds) which is not done chemically.
Mixtures are two types Homogeneous Mixtures and Heterogeneous mixtures.
Homogeneous Mixtures: A Homogeneous mixture has a uniform composition of its components throughout its mass. It does not have visible boundaries of separation between the various components. For example a sugar solution or a salt solution.
Heterogeneous Mixtures: A Heterogeneous mixtures does not have a uniform composition throughout its mass also it has visible boundaries of separation between various components. For example mixture of sand and water.

BEC stands for Bose-Einstein Condensate which is defined as the state of matter of a dilute gas of bosons which is cooled to temperatures very close to absolute zero.

In a cyclic process, the system starts and returns to the same thermodynamic state.
The net work involved is the enclosed area on the P-V diagram. If the cycle goes clockwise, the system does work. A cyclic process is the underlying principle for an engine.
If the cycle goes counterclockwise, work is done on the system every cycle. An example of such a system is a refrigerator or air conditioner.
Example of a Cyclic Process

Expansion at constant temperature (T1).
Removal of heat at constant volume (V2).
Compression at constant temperature (T2).
Addition of heat at constant volume (V1).

We'll show that this process does work. Because the process is cyclic, there is no change in internal energy after each cycle. Therefore the net work done in each cycle equals the heat added to the system. We now analyze each of the steps in the cycle.
Step 1 - Isothermal expansion: The system does work W1 which equals the heat Q1added to the system in the expansion, because the internal energy does not change.
Step 2 - Isochoric process: The work done is W2 = 0. Heat Q2 is removed from the system because the temperature decreases from T1 to T2.
Step 3 - Isothermal compression: The work W3 done by the system is negative, but of smaller magnitude than W1 because the area under the PV curve is less than that in step 1. The internal energy is does not change, so the heat removed is Q3 = W3.
Step 4 - Isochoric process: The reverse of step 2. W4 = 0, while heat Q4 = - Q2 is added to the system.
Cycle Summary
Because W2 and W4 = 0, the net work done is Wnet = W1 + W3
Because Q2 + Q4 =0, the net heat added is Qnet = Q1 + Q3 = Wnet