Answer:
Solar energy
Explanation:
This is because the sun is used
The sun's energy drives various processes on earth. One of these processes is photosynthesis in plants whereby light energy is converted into chemical energy by forming carbohydrates from carbon dioxide plus water, which is a process which usually gives off oxygen which animals need to breathe. Another process driven by the sun's energy could be evaporation of water into the air to form water vapour and clouds which then precipitate when cooled off over mountains so is involved in the water cycle.
Answer:
The letters of DNA pair up because they form hydrogen bonds: each contains hydrogen atoms, which are attracted to nitrogen or oxygen atoms in their partner
Explanation:
The options attached to this question are given below:
A. Their masses are always equal.
B. Each element always contributes the same number of atoms.
C. Atoms of different elements always combine in the same way.
D. Their volumes are always equal.
ANSWER
The correct option is C.
John Dalton was an English Chemist, he was the one who proposed the statements that are called Dalton's atomic theory. The theory is made up of five main points, they include the following:
1. All matters are made up of atoms.
2. Atoms of the same elements are identical.
3. Atoms of different elements vary in size and mass.
4. Compounds are formed when elements combined in whole ratios.
5. A chemical reaction result in rearrangement of the atoms in the reactants to form products.
Dalton atomic theory has been extensively revised.
