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3 years ago

1) Humans have how many sets of teeth?

1 answer:

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1) Humans have how many sets of teeth?

C) 4

2) Adults have how may permanent teeth?

B) 32

3) What type of food products make teeth stronger?

Cheese and Yogurt

4) What is the visible part of the tooth?

C) crown

5) What part of the tooth is harder than bone?

D) dentin

6) What part of the tooth is soft and contains the nerves?
A) pulp

7) What refers to the alignment of the teeth?

Occlusion

8) The lower teeth protect what?

D) tongue

9) Malocclusion is the least common reason for referral to orthodontists.

False

10) Usually, malocclusion is hereditary.
True

11) Which type of malocclusion is commonly referred to as an overbite?

Class Two

12) Bacteria are living organisms than cause cavities.
True

13) What is the whitish film that grows on your teeth called?

Plaque

14) What is the best fighter of cavities?

Fluoride

Gingivitis is the inflammation of the
A) gums

16) Gingivitis is permanent.

False

17) Name 2 ways to fight gingivitis.

Proper Toothbrushing and Flossing
Professional Dental Cleanings

18) The cause of gum disease is

B) bacteria

19) Untreated, periodontitis will progress until your teeth loosen and fall out.
True

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Fusion is a type of _____. chemical reaction physical reaction nuclear reaction

Inessa05 [86]

Answer: Fusion is a type of nuclear reaction.

Explanation:

Nuclear reaction is defined as those reaction in which nucleus of an atom is involved. There are two types of nuclear reaction:

Fusion : In this type, two or more smaller atomic nuclei are combined together to form larger nucleus with release in energy
Fission : In this type, one large unstable nucleus breaks down into two smaller nuclei with release in energy.

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3 years ago

Read 2 more answers

If dissolving carbon dioxide in water to form carbonic acid is the forward reaction, what is the reverse reaction that balances

kenny6666 [7]

Answer:

$H_2CO_3\rightleftharpoons H_2O + CO_2$

Explanation:

When carbon dioxide dissolves and reacts with water, the water and the gaseous $CO_2$ reacts to form a dilute mixture solution of $H_2CO_3$ (carbonic acid ).

The reaction is $H_2O + CO_2\rightleftharpoons H_2CO_3$

This is a forward reaction. And the symbol $\rightleftharpoons$ shows that the reaction can be reversible. It means that the reaction can be carried in forward direction as well as in the backward direction.

The reaction attains chemical equilibrium until the reactants and the products no longer changes with time.

The carbonic acid can also dissociates into carbon dioxide and water in the backward direction.

$H_2CO_3\rightleftharpoons H_2O + CO_2$

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4 years ago

*Name three ways the organisms in a food web get energy.

Anuta_ua [19.1K]

Answer:

1.)photosynthesis, chemosynthesis, and the consumption, this is three ways how organisms in a food web gets energy.

2.)Cells use energy in order to grow, regulate metabolism and reproduce. This energy is obtained from a source such as food molecules or light from the sun, and through processes like glycolysis, the citric acid cycle and oxidative phosphorylation, an energy-rich molecule is then created. The cell can then use the energy in the protein molecule to help it function.

3.)Food webs vary according to habitat, but all food webs have some things in common. Primary producers make up the base of a food web. Phytoplankton . Consumers cannot make their own food so they need to get food from other sources. This means that we are close to being a consumer because we cant make up our own food and we have to get other food from animals and plants and our drinks from many things that go through the food web.

Explanation:

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3 years ago

What is the weighted average atomic mass of an element?

const2013 [10]

Average atomic mass also considers the mass of the isotope of that element found in nature

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4 years ago

Compound A (C9H12) shows prominent peaks in its mass spectrum at m/z 120 and 91. Compound B (also C9H12) shows prominent peaks a

vodka [1.7K]

Answer:

Compound A: Propylbenzene

Compound B: Cumene

Explanation:

On this case, we have two clues:

1) The mass spectrometry info

2) The formation of benzoic acid

If we have the formation of benzoic acid with a strong oxidant ( $H_2CrO_4$ ). It means that we have an alky group bonded to benzene. Therefore we have to add three carbons to a benzene ring in order to obtain the mass of the compound (120).

The next question is how these three additional carbons are bonded to the benzene. For this, we have to check the mass info. For compound A we have a fragmentation moeity on 91 therefore we have a loss of an ethyl group. Therefore compound A have a linear structure for the aditional three carbons.

For compound B we have a fragmentation moeity on 105 this means a loss of 15 units of mass therefore we loss a methyl group. This indicates that we have a non linear structure fo the three additional carbons.

See figures 1 and 2.

I hope it helps!

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4 years ago