B. a solid must dissolve in a liquid
C. the solvent must be water
D. a gas must dissolve in a liquid
Answer:
1.A
2.A
3.A
4.A
100% RIGHT
Explanation:
Microevolution is based on fossils, geology, and comparisons to living organisms.
Both plants and animals are autotrophs because they can make their own food.
Parasites often show cospeciation because they must evolve with ther hosts.
Answer:
Parasites often show cospeciation because they must evolve with ther hosts.
Explanation:
Answer:
Temperature and humidity
Explanation:
Crystallization occurs in super saturated solution. These are the solutions that have solute to solvent ratio of 2:1 or more. Typical honey is 70% sugar and 20% water (the solute concentration is too high).
Two things cause honey to crystallize.
If temperature is lowered the rate of crystallization increases. This is because at low temperature the molecules of solvent come closer and the space between them reduces. This causes the additional solute molecules to be pushed up to form crystals.
Secondly, humidity also plays a key role. If the humidity reduces, the water molecules evaporates from honey into air. This increases the relative concentration of the solute inside the honey, which causes the honey to crystallize.
Ionic compounds form when a metal and nonmetal bond, as the metal loses its valence electrons which the nonmetal gains, resulting in an ionic bond. Covalent compounds form when two nonmetals bond, as they tend to share electrons allowing them to complete their valence shells resulting in a covalent bond.
The formation of ionic and covalent compounds depends on the elements involved and their properties. Metals, generally, have few valence (outer shell) electrons, while nonmetals have more. When a metal and nonmetal bond, the metal tends to lose its valence electrons, becoming a positively charged ion or cation, and the nonmetal gains these electrons, becoming a negatively charged ion or anion. This transfer of electrons results in an ionic bond.
On the other hand, when two nonmetals bond, they tend to share electrons because neither atom can completely overcome the other's attraction for electrons. These shared electrons allow them to complete their valence shells. This sharing of electrons results in a covalent bond.
#SPJ6
II. the thickness of a wire
III. the temperature of a wire
I and II
I and III
II and III
I, II, and III
Answer:
l and lll
Explanation:
The longer the wire, the more resistance that there will be and heating a metal conductor makes it more difficult for electricity to flow through it.
a) False.
Hydroelectric power is arenewable source of energy generated from moving water
b) True.
Oil is a non-renewable source used to make jet fuel
c) False
Propane is a byproduct of natural gas which is a non-renewable source of energy
d) False
Energy from the sun is a renewable source of energy
Ans : b) True
Answer:
B
Explanation: