Science Work, Help Please!

2 answers:

6 0

Diffusion is the movement of particles from a higher concentrated area to a lower concentrated area
Omosis is the movement of solvent particles across a sermipermeable membrane from a dilute solution into a concentrated solution

Mandarinka [93]3 years ago

4 0

Answer:

Diffusion is the spreading of something more widely. When you drop a sugar cube in hot tea the sugar cube spreads out and the sugar starts to dissolve in the tea. Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane. If the concentration of water molecules ouside the cell is lower than the concentration of water molecules outside the cell then the water moves out through osmosis. Water travels through the cell membrane.

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How does refraction and reflection of light waves help explain the production of a rainbow after a thunderstorm

Ray Of Light [21]

Answer:

White light is made up of different colors. When white light enters water (like moisture in the air) it is bent (refracted). However the different colors are bent (refracted) by different amounts. So this different amount of bending has the effect of separating the white light into its colors and we see this as a rainbow.

Explanation:

7 0

4 years ago

Define meiosis, mitosis, and heredity

Korvikt [17]

Meiosis: A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.

Mitosis: A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

Heredity: The passing on of physical or mental characteristics genetically from one generation to another.

5 0

4 years ago

A patient with single lung transplantation has a body temperature of 99° f, fatigue, shortness of breath, and an oxygen saturati

pashok25 [27]

The patient's symptoms indicate that he probably suffers from acute lung rejection. Acute rejection consists an immune reaction to the tissue introduced into the body and it could happen after a week of the transplant procedure. The patient should be administered corticosteroids, as they have been shown to have anti-inflammatory effects and they could reduce the fever. In addition, the patient should be administered prednisone, which is a synthetic corticosteroid drug very commonly used as a suppressor of the immune system.

3 0

3 years ago

3.Why should a model of the carbon cycle include the burning of fossil fuels?(1 point)

user100 [1]

Answer:

Burning fossil fuels moves carbon from the geosphere to the atmosphere.

Explanation:

Fossil fuels such as coal, petroleum and natural gas are produced and stored in the geosphere. i.e. the part of the Earth that includes the Earth's interior, landforms, rocks and minerals.
Fossil fuels, extracted from the geosphere are burned to generate energy.
Combustion of fossil fuels releases the stored carbon into the atmosphere in the form of carbon dioxide.

5 0

3 years ago

Which type of primary brain tumor usually arises in the walls of the fourth ventricle in children and in the lateral ventricles

larisa86 [58]

Answer:

Primitive neuroectodermal tumor (PNET)

Explanation:

They usually occur in early childhood but may become symptomatic in adult life. In children, they commonly occur in or near a spinal fluid sac known as the fourth ventricle and are called medulloblastomas.

5 0

2 years ago