Is calcium carbonate soluble in water?
Under normal conditions calcium carbonate is water insoluble. When carbon dioxide is present carbonic acid is formed, affecting calcium compounds. Elementary calcium reacts with water. Calcium compounds are more or less water soluble.
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Under normal conditions calcium carbonate is water insoluble. When carbon dioxide is present carbonic acid is formed, affecting calcium compounds. Elementary calcium reacts with water. Calcium compounds are more or less water soluble.
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Which is the largest blackwater river in the world?
Anonymous Quiz
23%
Zambezi River
39%
Nile River
26%
Rio Negro River
11%
Murray River
Is smoke a state of matter?
Smoke is particulate material suspended in a gas (air). The particulates may be very finely divided solids or aerosol particles composed of liquid materials. Smoke is neither solid or gas, it is a colloidal dispersion that is a different arrangement of matter.
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Smoke is particulate material suspended in a gas (air). The particulates may be very finely divided solids or aerosol particles composed of liquid materials. Smoke is neither solid or gas, it is a colloidal dispersion that is a different arrangement of matter.
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How long does a caterpillar stay in a cocoon?
The process from egg to butterfly is weather dependent and also depends on the regional climate. It can take about four weeks in the peak of the summer in warmer climates. The egg takes 5 to 10 days, the larva/caterpillar and pupa/chrysalis each take about 10 to 14 days.
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The process from egg to butterfly is weather dependent and also depends on the regional climate. It can take about four weeks in the peak of the summer in warmer climates. The egg takes 5 to 10 days, the larva/caterpillar and pupa/chrysalis each take about 10 to 14 days.
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Which Rh factor is dominant?
A baby may have the blood type and Rh factor of either parent, or a combination of both parents. Rh factors follow a common pattern of genetic inheritance. The Rh positive gene is dominant (stronger) and even when paired with an Rh negative gene, the positive gene takes over.
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A baby may have the blood type and Rh factor of either parent, or a combination of both parents. Rh factors follow a common pattern of genetic inheritance. The Rh positive gene is dominant (stronger) and even when paired with an Rh negative gene, the positive gene takes over.
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Do whales drink salt water?
DOLPHINS and other sea-dwelling mammals can obtain water from their food and by producing it internally from the metabolic breakdown of food. Although some marine mammals are known to drink seawater at least on occasion, it is not well established that they routinely do so.
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DOLPHINS and other sea-dwelling mammals can obtain water from their food and by producing it internally from the metabolic breakdown of food. Although some marine mammals are known to drink seawater at least on occasion, it is not well established that they routinely do so.
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How many pairs of legs does a hermit crab have?
A hermit crab has two pairs of antennae and round eyes on the ends of eyestalks. Hermit crabs have 10 legs, but only 6 legs show. These front 6 legs are known as walking legs. Hermit crabs keep their 4 back legs inside their shell.
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A hermit crab has two pairs of antennae and round eyes on the ends of eyestalks. Hermit crabs have 10 legs, but only 6 legs show. These front 6 legs are known as walking legs. Hermit crabs keep their 4 back legs inside their shell.
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What causes a double rainbow?
Secondary rainbows are caused by a double reflection of sunlight inside the raindrops, and appear 10° outside of the primary rainbow at an angle of 50–53°. As a result of the second reflection, the colours of a secondary rainbow are inverted compared to the primary bow, with blue on the outside and red on the inside.
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Secondary rainbows are caused by a double reflection of sunlight inside the raindrops, and appear 10° outside of the primary rainbow at an angle of 50–53°. As a result of the second reflection, the colours of a secondary rainbow are inverted compared to the primary bow, with blue on the outside and red on the inside.
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Is the sun a yellow dwarf star?
The sun is classified as a G-type main-sequence star, or G dwarf star, or more imprecisely, a yellow dwarf. Actually, the sun — like other G-type stars — is white, but appears yellow through Earth's atmosphere. Stars generally get bigger as they grow older.
@askmenow
The sun is classified as a G-type main-sequence star, or G dwarf star, or more imprecisely, a yellow dwarf. Actually, the sun — like other G-type stars — is white, but appears yellow through Earth's atmosphere. Stars generally get bigger as they grow older.
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Do plants move on their own?
Plants cannot move around like animals, but they still show movements. Shoots grow; leaves turn toward the Sun. If a plant has flowers, they open and close. Climbing plants have fine tendrils, or stems, that reach out until they find something firm to grip onto.
@askmenow
Plants cannot move around like animals, but they still show movements. Shoots grow; leaves turn toward the Sun. If a plant has flowers, they open and close. Climbing plants have fine tendrils, or stems, that reach out until they find something firm to grip onto.
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Is sodium and salt the same thing?
Salt and sodium are not the same thing. "Salt" is the term commonly used for sodium chloride (NaCl) which is table salt. Sodium chloride is just 40% sodium and 60% chloride. One teaspoon of table salt contains 2,325 mg of sodium.
@askmenow
Salt and sodium are not the same thing. "Salt" is the term commonly used for sodium chloride (NaCl) which is table salt. Sodium chloride is just 40% sodium and 60% chloride. One teaspoon of table salt contains 2,325 mg of sodium.
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What months are the equinoxes?
The vernal equinox occurs on March 20 or 21 and the autumnal equinox on September 22 or 23, marking the beginning of spring and autumn, respectively, in the Northern Hemisphere (and the reverse in the Southern Hemisphere). The days on which an equinox falls have about equal periods of sunlight and darkness.
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The vernal equinox occurs on March 20 or 21 and the autumnal equinox on September 22 or 23, marking the beginning of spring and autumn, respectively, in the Northern Hemisphere (and the reverse in the Southern Hemisphere). The days on which an equinox falls have about equal periods of sunlight and darkness.
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How long can an armadillo hold its breath?
Armadillos like to swim, and they are very good at it. They have a strong dog paddle, and can even go quite a distance underwater, walking along the bottom of streams and ponds. They can hold their breath for four to six minutes at a time.
@askmenow
Armadillos like to swim, and they are very good at it. They have a strong dog paddle, and can even go quite a distance underwater, walking along the bottom of streams and ponds. They can hold their breath for four to six minutes at a time.
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Do penguins fly in the air?
Penguins are birds, so they do have wings. However, the wing structures of penguins are evolved for swimming, rather than flying in the traditional sense. Penguins do “fly” underwater at speeds of up to 15 to 25 miles per hour . As adept swimmers, penguins spend a lot of time in the water.
@askmenow
Penguins are birds, so they do have wings. However, the wing structures of penguins are evolved for swimming, rather than flying in the traditional sense. Penguins do “fly” underwater at speeds of up to 15 to 25 miles per hour . As adept swimmers, penguins spend a lot of time in the water.
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What makes a firefly glow?
Fireflies light up to attract a mate. To do this, the fireflies contain specialized cells in their abdomen that make light. The cells contain a chemical called luciferin and make an enzyme called luciferase. To make light, the luciferin combines with oxygen to form an inactive molecule called oxyluciferin.
@askmenow
Fireflies light up to attract a mate. To do this, the fireflies contain specialized cells in their abdomen that make light. The cells contain a chemical called luciferin and make an enzyme called luciferase. To make light, the luciferin combines with oxygen to form an inactive molecule called oxyluciferin.
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How many moons does Mars have?
Mars has two moons, Phobos and Deimos, which are thought to be captured asteroids. Both satellites were discovered in 1877 by Asaph Hall and are named after the characters Phobos (panic/fear) and Deimos (terror/dread) who, in Greek mythology, accompanied their father Ares, god of war, into battle.
@askmenow
Mars has two moons, Phobos and Deimos, which are thought to be captured asteroids. Both satellites were discovered in 1877 by Asaph Hall and are named after the characters Phobos (panic/fear) and Deimos (terror/dread) who, in Greek mythology, accompanied their father Ares, god of war, into battle.
@askmenow
Do fish sleep at night?
Yes, I would say that fish do sleep. Some fish actually lie on the bottom at night. Some of them even produce a gooey covering as a protection against other fish who might be looking for an easy meal. In the dark many fish have a lower rate of metabolism (their body machinery slows down), and that is much like sleep.
@askmenow
Yes, I would say that fish do sleep. Some fish actually lie on the bottom at night. Some of them even produce a gooey covering as a protection against other fish who might be looking for an easy meal. In the dark many fish have a lower rate of metabolism (their body machinery slows down), and that is much like sleep.
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What kind of animal is a platypus?
The platypus (Ornithorhynchus anatinus) also known as the duck-billed platypus is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
@askmenow
The platypus (Ornithorhynchus anatinus) also known as the duck-billed platypus is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
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What is the instrument used to measure sunshine?
Measurement is performed by instruments called sunshine recorders. For the specific purpose of sunshine duration recording, Campbell–Stokes recorders are used, which use a spherical glass lens to focus the sun rays on a specially designed tape.
@askmenow
Measurement is performed by instruments called sunshine recorders. For the specific purpose of sunshine duration recording, Campbell–Stokes recorders are used, which use a spherical glass lens to focus the sun rays on a specially designed tape.
@askmenow