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Explanation:

Reasons to Move

Most animals that MIGRATE do so to find food or more LIVABLE conditions. Some animals migrate to breed. ... Some crustaceans also migrate for breeding. In many species of crabs, the females will move into shallow coastal waters to mate and lay her eggs, then they return to DEEPER ocean waters.

ong>Answer:

Tooth decay (dental caries) is damage to a tooth that can HAPPEN when decay-causing bacteria in your mouth make acids that attack the tooth's surface, or ENAMEL. This can lead to a small hole in a tooth, called a cavity. If tooth decay is not treated, it can cause PAIN, infection, and even tooth LOSS.

1538°

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...

Types of MOTION Example

(a) LINEAR A motion of stone falling

(B) Translatory Buses

(c) Circular Ceiling fan

(d) Periodic Pendulum of c

Explanation:

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Luminous objects-aun,lighted candle,electric BULB,firefly,star,moon

non luminous objects-table,wall,chair,tree,SHOE,BOOK, blackboard,pencil

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false

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pt

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ong>Answer:

TAILS and gills

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ong>Answer:

MAY be goldsmith had WASHED up the JEWELLERY very hardly due to which it may be lost the weight .

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ong>Answer:

Villus, PLURAL villi, in ANATOMY any of the small, slender, vascular projections that increase the surface area of a membrane. ... The villi of the small intestine PROJECT into the intestinal cavity, GREATLY increasing the surface area for food absorption and ADDING digestive secretions

Explanation:

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recommended increased PROVISION in government's BUDGET for expenditure

on EDUCATION of neglected section like the SC/ST

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Protein, vitamins, CARBOHYDRATE the names of components of FOOD which PROVIDE energy

ogen as alkali metal?

The only thing hydrogen has in common with alkali metals is in having ONE electron in its outermost shell and having a valency (combining power) of one. Unlike the group one ELEMENTS hydrogen is clearly not a metal (it is a gas at room temperature) and is a poor conductor of heat and electricity. It does not readily form H+ cations and forms covalent bonds in most compounds, whereas group 1 metals readily form cations and form only ionic bonds. Also, alkali metals form basic oxides while hydrogen oxide (water) is amphoteric (both acidic and basic).

Hydrogen as a halogen?

Hydrogen, like the halogens, has one electron short of a complete outer shell and can form H- ions like Cl- and therefore forms ionic compounds with reactive metals – NaH similar in structure to NaCl. Hydrogen also exists as a diatomic gas like fluorine and chlorine. However, here the similarity ends – hydrogen is a reducing agent while the halogens are oxidising agents, hydrogen reacts vigorously with oxygen but not with most metals while the reverse is true of the halogens. Furthermore, hydrogen oxide (water) is amphoteric, while halogen oxides are acidic only.

So hydrogen is neither an alkali metal nor halogen.

POSITION Of Hydrogen

1)Hydrogen is the first ELEMENT in the periodic table.

2)It is the lightest element known.

3)It atomic form exists only at high temperature.

4)It exist as a diatomic MOLECULE i.e. H2 .That is why it is also called dihydrogen.

5) It was discovered by Henry Cavendish in 1766.

6) Its electronic configuration is 1s1

Unique position of Hydrogen in periodic table

A proper position could not be assigned to it because of the following reason:

1) In some properties it resembles alkali such, it can be placed in group 1 of the periodic table along with alkali metals.

2) In some other properties, hydrogen resembles such, it can be placed in group 17 along with halogens.

3) In some hydrogen differs from both alkali metals and halogens.

Resemblance with alkali metals

Hydrogen resembles alkali metals i.e. Li , K , Na , K, Rb ,Cs and Fr of group 1 of the periodic table.

1) Electronic configuration : Like alkali metals, hydrogen also contains 1 electron in its outermost shell.

Hydrogen 1s1

Lithium 1s2 2s1

Sodium 1s2 2s2 2p6 3s1

2) Electropositive character: Like alkali metals ,hydrogen also loses its only electron to form hydrogen ion i.e. H+

H ——-> H+ + e‾

Na ———-> Na+ + e‾

Hydrogen like alkali metals exhibit electropositive character.

ong>ANSWER:

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ong>Explanation:

Oxygen, heat, and fuel are FREQUENTLY referred to as the "fire triangle." Add in the FOURTH element, the chemical REACTION, and you actually have a fire "tetrahedron." The important thing to remember is: TAKE any of these four THINGS away, and you will not have a fire or the fire will be extinguished.

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Microsoft EXCEL is a helpful and powerful program for data analysis and documentation. It is a spreadsheet program, which contains a number of COLUMNS and ROWS, where each intersection of a column and a row is a “cell.” Each cell contains one point of data or one piece of information.

ong>Answer:

Fire control is the practice of reducing the HEAT output of a fire, reducing the area over which the fire exists, or SUPPRESSING or extinguishing the fire by depriving it of fuel, oxygen, or heat (see fire TRIANGLE).

EXPLANATION:

ong>Explanation:

Types of Teeth and Their Functions

Incisors – The four front teeth in both the UPPER and lower jaws are called incisors. ...

CANINES – There are four canines in the oral cavity. ...

Premolars (Bicuspids) – These teeth are LOCATED behind and adjacent to the canines and are DESIGNED to crush food. ...

Molars – The most posterior teeth in the mouth are the molars.

petroleum jelly

Explanation:

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SWEET potato I think it is correct TELL if it is wrong

FATTY acid

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Explanation:

ong>Explanation:

Three different types of ANIMALS EXIST: HERBIVORES, OMNIVORES, and carnivores. Herbivores are animals that EAT only plants. Carnivores are animals that eat only meat. Omnivores are animals that eat both plants and meat

ong>Answer:

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if it soft or moist USE hair drier or PUT them in sun light

A contour line of a function of two variables is a curve along which the function has a constant value, so that the curve JOINS points of equal value. It is a plane section of the three-dimensional graph of the function F parallel to the-plane.

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chromatography is the METHOD involving colour BAND

it's TRUE...

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ong>Answer:

area= SQUARE metre

Symbiotic PLANT = lichens

Density= kg/ cubic metre

soil=plasticity

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calcium

Explanation:

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Sodium carbonate + acetic ACID → Sodium acetate + CARBON dioxide + waterSodium carbonate + acetic acid → Sodium acetate + carbon dioxide + water

5.3g 6g 8.2g 2.2g 0.9g

As per the law of conservation of mass, the total mass of reactants must be equal to the total mass of

products

As per the above reaction, LHS = RHS i.e., 5.3g + 6g = 2.2g + 0.9 g + 8.2 g = 11.3 g

Hence the observations are in agreement with the law of conservation of mass.

ong>Answer:

a RADIANCE of Thine. Shine through me and be so in me that every soul I COME in contact with may feel Thy PRESENCE in my soul. Let them look up and see no LONGER me but only Jesus. Stay with me and then I SHALL begin to shine as you shine, so to shine as to be a light to others. Amen.

ong>Answer:

Answer the following questions,

1. The old farmer is a KIND person. What EVIDENCE o

kindness do you find in the first two paragraphs.

2. What did the dog do to lead the farmer to the hidden

3. (i) How did the spirit of the dog help the farmer first

(II) How did it help him

Explanation:

in the question only answer is there check it THOROUGHLY

OPTION number one is the answer

ong>Answer:

Jupiter is the LARGEST planner in our solar system.

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ong>EXPLANATION:

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ong>carbon dioxide- CO2

Magnesium oxide - Mgo

SODIUM chloride- NaCI

copper SULPHATE - CuSO4

sulphuric ACID - H2(SMALL 2)SO4(small 4)

nitric acid - HNO3(small 3)

sodium hydroxide - NaOH

Sulphur dioxide- SO2(small 2)

Water - H2O

ammonia gas - NH3

sodium chloride - NaCI

potassium chloride -KCI

carbon monoxide - CO

magnesium chloride - MgCI

hydrogen sulphide - H2(small 2)S

Methan - CH4

hydrochloric acid - HCI

ammonium sulphate - (NH4{small 4} )2{small 4} SO4{small 4}

calcium nitrate- Ca(NO3)2

iron sulphide - FeS

sodium phosphate- Na3(small 3)PO4(small 4 )

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ong>Answer:

Phosphorus

is a very reactive non-metal. It catches FIRE if exposed to air. To PREVENT the contact of phosphorus with ATMOSPHERIC oxygen, it is stored in WATER.

Given: ATOMIC mass of helium atom = 4u, 2 protons in helium nucleus

Atomic mass = number of protons + number of NEUTRONS

4 = 2 + number of neutrons

Number of neutrons = 4 – 2 = 2

Hence, Helium has 2 neutrons.

Explanation:

2.charge

3.common or NON toxic

4.temperature

Q2 don't know the answer

Q3

a)almond

b)ash

c)RAILWAY accident

like particles that contains the mail reproductive parts are called​ Pollen.

Pollen is a powdery substance CONSISTING of pollen grains which are MALE microgametophytes of SEED plants, which produce male gametes (sperm cells).

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ong>Answer:

Chemistry, 01.04.2021 20:00 tonimgreen17p6vqjq

I NEED THE ANSWER ASAP The graph shows the amount of pesticides and fertilizers detected in a pond ecosystem that had cricket FROGS, alligators, and mosquitoes. A graph with the title Amount of Chemicals. The y axis title is Chemicals and next to it is an arrow pointing upwards. The x axis title is Year and the values 1, 2, 3 4. 5 are marked on the x axis. A solid graph line is SHOWN sloping steeply upwards. A broken graph line is also shown with a lesser slope. A key is shown at the bottom RIGHT of the graph. Next to the straight line is written Pesticides and next to the broken line is written Fertilizers.

Explanation:

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ong>Answer:

Wool obtained from hair of Yak, SHEEP, camel and buffalo are called as fleece. Thick covering of the wool on a sheep and the covering are useful for making the piece of clothing are called as the Fleece.

Weather is the STATE of the atmosphere at any given time including things like temperature, precipitation, air pressure, and cloud cover. Although daily changes in weather are due to winds and storms, the SEASONAL changes we live with are due to the earth revolving around the sun.

The cellular process of releasing energy from FOOD through a series of enzyme-controlled reactions is called respiration . Some of the energy released is used to produce ATP. ... Aerobic respiration occurs if oxygen is PRESENT in the cell.

ong>ANSWER:

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EXPLANATION:

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Explanation:

The magnetic FIELD disappears when the CURRENT is turned off. The wire turns are often wound AROUND a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic FLUX and makes a more powerful magnet.