Answer:
True
Explanation:
Smiling is considered as a universal sign of happiness. Smiling is something that makes a person happy internally. During birth babies smile. Some people smile even during sleep. It has been observed that when people are exposed to something they love or enjoy, they usually smile such as song, music, old photographs etc. Smiling is not a learned behaviour , it is considered as a sign of pleasure and openness across various cultures.
Hence, the given statement is true
The Van der Waal’s forces are the forces, which are formed by the attraction of two opposite charged bodies. This charge exists due to the formation of the dipoles in the molecules or atom. The dipoles formed due to the movement of the electron in the atoms. The strength of the dipole or Van der Waal attraction depends on the size of the atoms or the molecule. As the size increases, the strength of the Van der Waal force increases. The positive and the negative regions are shown in the attached picture.
Answer:
KLJ & EFH
Explanation:
Right angles have a 90° angle
To be simple and easy, your answer would be:
1. Mars
2. Mercury
3. Venus
The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or <span>Catastrophic events.
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