My science teacher trying to be cool

Verizon [17]

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

6 0

3 years ago

Which element would mostly have chemical properties similar to that of magnesium (Mg)?

DanielleElmas [232]

The elements of same group are placed in same group as they have similar properties. So Calcium is the element which resembles Mangesium.

Calcium and Magnesium both are alkaline earth metals.

They have similar properties as they have similar outer or valence shell electronic configuration

The general electronic configuration of alkaline earht metal is ns2

The electronic configuration of Mg [atomic number 12] and Ca [atomic number 20] are

$[Ne]3s^{2}$ and $[Ar]4s^{2}$ respectively.

7 0

3 years ago

A graduated cylinder contains 20.8 mL of water. What is the new water level, in milliliters, after 35.2 g of silver metal is sub

stepladder [879]

Answer: The new water level of the cylinder is 24.16 mL

Explanation:

To calculate the volume of water displaced by silver, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of silver = 10.49 g/mL

Mass of silver = 35.2 g

Putting values in above equation, we get:

$10.49g/mL=\frac{35.2g}{\text{Volume of silver}}\\\\\text{Volume of silver}=\frac{35.2g}{10.49g/mL}=3.36mL$

We are given:

Volume of graduated cylinder = 20.8 mL

New water level of the cylinder = Volume of graduated cylinder + Volume of water displaced by silver

New water level of the cylinder = (20.8 + 3.36) mL = 24.16 mL

Hence, the new water level of the cylinder is 24.16 mL

5 0

3 years ago

Which statement below about contrasting Hb and Mb is FALSE?

olchik [2.2K]

Answer:

C. Hb binds O2 more tightly than Mb.

Explanation:

Hb and Mb are both oxygen carrier protiens which contain the heme group. Hb has 4 heme units in 1 moleucle which work via coperative effect. On the other hand, Mb has only one heme unit.

From above theory, statement A and B are correct.

Although the heme group of the Mb is identical to those of Hb, Mb has a higher affinity for carrying oxygen than hemoglobin.

Hence, Statement C is wrong.

Thats why the function of hemoglobin is to transport oxygen and that of myoglobin is to store oxygen.

When a curve is plotted between oxygen accepted and the pressure of the oxygen, Hb shows sigmoidal, whereas Mb shows hyperbolic oxygen saturation curves. The statement D is correct.

Bohr effect and various factors decribe the statement : Hb-oxygen binding is dependent on physiological changes in pH, whereas Mb-oxygen binding is not. The statement E is also correct.

7 0

3 years ago

What part of the geocentric model was incorporated in the heliocentric model?

boyakko [2]

C. A central body is the center of the universe.

4 0

3 years ago