Define the following:
1) Contraction
2) Chemical change
3) Buoyant force
4) Texture
5) BMI
6) Dietary fibers
Answers
Answer:
1. The process of becoming smaller.
2.Chemical change occurs when a substance combines with another to form a new substance called chemical synthesis into two or more different substances.
3.Buoyant force is an upward force exerted by a fluid that oposses the weight of partially or fully immersed object.
Explanation:
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Answer:
(1. )Definition of contraction
1a: the action or process of contracting
The hot metal undergoes contraction as it cools.
: the state of being contracted
b: the shortening and thickening of a functioning muscle or muscle fiber
c: a reduction in business activity or growth
d: the act of acquiring or incurring (something, such as a debt) or catching (something, such as an infection)
(2. )Chemical Changes
Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called the reactants, and the end results are called the products. The change from reactants to products is signified by an arrow:
Reactants → Products
The formation of gas bubbles is often the result of a chemical change (except in the case of boiling, which is a physical change). A chemical change might also result in the formation of a precipitate, such as the appearance of a cloudy material when dissolved substances are mixed.
Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds. For example, burned wood becomes ash, carbon dioxide, and water. When exposed to water, iron becomes a mixture of several hydrated iron oxides and hydroxides. Yeast carries out fermentation to produce alcohol from sugar.
An unexpected color change or release of odor also often indicates a chemical change. For example, the color of the element chromium is determined by its oxidation state; a single chromium compound will only change color if it undergoes an oxidation or reduction reaction. The heat from cooking an egg changes the interactions and shapes of the proteins in the egg white, thereby changing its molecular structure and converting the egg white from translucent to opaque.
The best way to be completely certain whether a change is physical or chemical is to perform chemical analyses, such as mass spectroscopy, on the substance to determine its composition before and after a reaction.
(3.) the three types of buoyancy are positive buoyancy, negative buoyancy, and neutral buoyancy. Positive buoyancy is when the immersed object is lighter than the fluid displaced and this is the reason why the object floats.
(4.) texture
the way that something feels when you touch it
(5.) If the BMI value is below the 5th percentile for children, they are considered underweight. If the BMI value is over 95th percentile value, they are considered obese. A value within 85th and 95th percentile is considered overweight and from 5th to 85th percentile, the value is considered as normal.
(6.)Dietary fiber consists of non-starch polysaccharides and other plant components such as cellulose, resistant starch, resistant dextrins, inulin, lignins, chitins (in fungi), pectins, beta-glucans, and oligosaccharides.
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