Why do we have two sets of teeth?
The reason you have two sets of teeth probably comes down to size. A full set of permanent teeth would be too big to fit into a young child's mouth. So milk teeth act as a bridge until the jaw is large enough to accommodate a full set of permanent teeth. The last teeth that emerge are your wisdom teeth.
@askmenow
The reason you have two sets of teeth probably comes down to size. A full set of permanent teeth would be too big to fit into a young child's mouth. So milk teeth act as a bridge until the jaw is large enough to accommodate a full set of permanent teeth. The last teeth that emerge are your wisdom teeth.
@askmenow
What is the dew point?
Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation. A state of saturation exists when the air is holding the maximum amount of water vapor possible at the existing temperature and pressure.
@askmenow
Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation. A state of saturation exists when the air is holding the maximum amount of water vapor possible at the existing temperature and pressure.
@askmenow
How long does it take for light to travel from Earth to Mars?
All communication between Mars and Earth goes through satellites. Because of the distance, there is a substantial delay. As communication signals travel at the speed of light, this means that it can take between 3 and 22 minutes for the information to reach the other end, so a phone call would not be practical.
@askmenow
All communication between Mars and Earth goes through satellites. Because of the distance, there is a substantial delay. As communication signals travel at the speed of light, this means that it can take between 3 and 22 minutes for the information to reach the other end, so a phone call would not be practical.
@askmenow
Which planet has the hottest surface temperature?
Venus, the second closest plant to the Sun, has the highest average temperatures of any planet in our Solar System, regularly reaching temperatures over 460°C. Venus is so hot because of its proximity to the Sun and its thick atmosphere.
@askmenow
Venus, the second closest plant to the Sun, has the highest average temperatures of any planet in our Solar System, regularly reaching temperatures over 460°C. Venus is so hot because of its proximity to the Sun and its thick atmosphere.
@askmenow
Why is it called a wisdom tooth?
Wisdom teeth are called wisdom teeth because they erupt (emerge) into the mouth when people are in their late teens or early twenties, affectionately termed the “Age of Wisdom.” Wisdom teeth are technically referred to as third molars, and they're just like all the other teeth in your mouth.
@askmenow
Wisdom teeth are called wisdom teeth because they erupt (emerge) into the mouth when people are in their late teens or early twenties, affectionately termed the “Age of Wisdom.” Wisdom teeth are technically referred to as third molars, and they're just like all the other teeth in your mouth.
@askmenow
Why does the sun lighten our hair and darken our skin?
Melanin is a pigment found in your skin and hair cells that gives each its color. It does seem weird that the sun bleaches our hair and darkens our skin. This mostly has to do with hair being dead and skin being alive. The sun bleaches and destroys the melanin in your hair giving you lighter hair.
@askmenow
Melanin is a pigment found in your skin and hair cells that gives each its color. It does seem weird that the sun bleaches our hair and darkens our skin. This mostly has to do with hair being dead and skin being alive. The sun bleaches and destroys the melanin in your hair giving you lighter hair.
@askmenow
What is a neutralization reaction and what does it produce?
A neutralization reaction is the reaction between an acid and a base to produce water and a salt. A salt is another name for an ionic compound and the specific salt produced depends on the acid and base involved. The product solution is neutral while the starting solutions are acidic and basic respectively.
@askmenow
A neutralization reaction is the reaction between an acid and a base to produce water and a salt. A salt is another name for an ionic compound and the specific salt produced depends on the acid and base involved. The product solution is neutral while the starting solutions are acidic and basic respectively.
@askmenow
Why does Aspirin help during a heart attack?
Platelets are cells that clump together and help to form blood clots. Aspirin keeps platelets from clumping together, thus helping to prevent or reduce blood clots. During a heart attack. Blood clots form in an already-narrowed artery and block the flow of oxygen-rich blood to the heart muscle.
@askmenow
Platelets are cells that clump together and help to form blood clots. Aspirin keeps platelets from clumping together, thus helping to prevent or reduce blood clots. During a heart attack. Blood clots form in an already-narrowed artery and block the flow of oxygen-rich blood to the heart muscle.
@askmenow
What are the elements that make up living things?
The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Atoms of these elements combine and form thousands of large molecules. These large molecules make up the structures of cells and carry out many processes essential to life.
@askmenow
The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Atoms of these elements combine and form thousands of large molecules. These large molecules make up the structures of cells and carry out many processes essential to life.
@askmenow
Which gas is known as laughing gas?
Laughing gas is nitrous oxide, N2O (more properly called dinitrogen oxide). It is a colorless gas with a sweet odor and taste. Inhalation leads to disorientation, euphoria, numbness, loss of motor coordination, dizziness, and ultimately a loss of consciousness.
@askmenow
Laughing gas is nitrous oxide, N2O (more properly called dinitrogen oxide). It is a colorless gas with a sweet odor and taste. Inhalation leads to disorientation, euphoria, numbness, loss of motor coordination, dizziness, and ultimately a loss of consciousness.
@askmenow
What makes red blood cells and white blood cells?
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.
@askmenow
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.
@askmenow
Can pure water conduct electricity?
A solution conducts current when positive and negative ions are randomly dissolved in it. Pure water doesn't have enough ions but when you add HCl you add a strong electrolyte so, after the addition, solution can conduct electricity very well.
@askmenow
A solution conducts current when positive and negative ions are randomly dissolved in it. Pure water doesn't have enough ions but when you add HCl you add a strong electrolyte so, after the addition, solution can conduct electricity very well.
@askmenow
How long is a football goal post?
The goal posts must be 18 feet, 6 inches wide and the top face of the crossbar must be 10 feet above the ground. Vertical posts extend at least 30 feet above the crossbar. A ribbon 4 inches by 42 inches long is to be attached to the top of each post.
@askmenow
The goal posts must be 18 feet, 6 inches wide and the top face of the crossbar must be 10 feet above the ground. Vertical posts extend at least 30 feet above the crossbar. A ribbon 4 inches by 42 inches long is to be attached to the top of each post.
@askmenow
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Do penguins have a tongue?
Penguins have very specialised tongues that are rarely seen since they don't extend out of the beak. Penguins tongues are covered with lots of little spiky spines that all point backward into the throat so that when a penguin catches a fish it is gripped by the spines and cannot escape.
@askmenow
Penguins have very specialised tongues that are rarely seen since they don't extend out of the beak. Penguins tongues are covered with lots of little spiky spines that all point backward into the throat so that when a penguin catches a fish it is gripped by the spines and cannot escape.
@askmenow
How are comets and asteroids different?
Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material. Both asteroids and comets were formed early in the history of the solar system about 4.5 billion years ago. Asteroids formed much closer to the Sun, where it was too warm for ices to remain solid.
@askmenow
Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material. Both asteroids and comets were formed early in the history of the solar system about 4.5 billion years ago. Asteroids formed much closer to the Sun, where it was too warm for ices to remain solid.
@askmenow
Do evergreen trees lose their leaves?
Deciduous trees shed their leaves usually as an adaptation to a cold or dry season. Most tropical rainforest plants are evergreens, replacing their leaves gradually throughout the year as the leaves age and fall, whereas species growing in seasonally arid climates may be either evergreen or deciduous.
@askmenow
Deciduous trees shed their leaves usually as an adaptation to a cold or dry season. Most tropical rainforest plants are evergreens, replacing their leaves gradually throughout the year as the leaves age and fall, whereas species growing in seasonally arid climates may be either evergreen or deciduous.
@askmenow
How do you get finger prints?
A person's fingerprints are formed when they are a tiny developing baby in their mother's womb. Pressure on the fingers from the baby touching, and their surroundings create what are called "friction ridges", the faint lines you see on your fingers and toes.
@askmenow
A person's fingerprints are formed when they are a tiny developing baby in their mother's womb. Pressure on the fingers from the baby touching, and their surroundings create what are called "friction ridges", the faint lines you see on your fingers and toes.
@askmenow