English Grammar Essentials: Tenses, Verbs, Vocabulary
English Grammar Essentials
Present Simple
PERSON + VERB + COMPLEMENT
| Affirmative | Negative | Interrogative | |
|---|---|---|---|
| I – YO | I run in the park | I don’t run in the park | Do I run in the park? |
| YOU – TU | You run in the park | You don’t run in the park | Do you run in the park? |
| HE – EL | He runs in the park | He doesn’t run in the park | Does he run in the park? |
| SHE – ELLA | She runs in the park | She doesn’t run in the park | Does she run in the park? |
| IT – ESO | It runs in the park | It doesn’t run in the park | Does it run in the park? |
| WE – NOSOTROS | We run in the |
Key Concepts in Biology: From Molecules to Cellular Processes
Pasteur’s Experiment and Spontaneous Generation
Pasteur’s experiment disproved the theory of spontaneous generation. It was a testable and repeatable experiment.
Chemical Bonds and Interactions
Polar vs. Non-Polar Molecules
- Polar: Not balanced.
- Non-Polar: Balanced.
Types of Chemical Bonds
- Covalent Bond: A bond where two atoms share electrons to achieve stability. An atom can share up to four electrons.
- Hydrogen Bond: A weak connection between a hydrogen atom and another atom, such as oxygen or nitrogen
Understanding Mixtures and Solutions: Types and Separation
Mixtures and Solutions
Mixtures are combinations of several pure substances that do not interact chemically. The proportion between the different substances can vary widely, but each retains its composition and properties.
Homogeneous Mixtures
In homogeneous mixtures, the compounds are uniformly disseminated. Any portion of the mixture has the same chemical composition and identical properties. In this case, the mixture is said to have a single phase.
Heterogeneous Mixtures
In heterogeneous mixtures,
Read MoreSulfites and Food Additives: Uses and Risks
Sulfites (E-220 to E-228): Uses and Risks
Sulfites are a group of food additives commonly used for their preservative and antioxidant properties. They include:
- E-220 Sulfur dioxide (SO2)
- E-221 Sodium sulfite (Na2SO3)
- E-222 Sodium hydrogen sulfite (sodium bisulfite) (NaHSO3)
- E-223 Sodium metabisulfite (sodium pyrosulfite) (Na2S2O5)
- E-224 Potassium metabisulfite (potassium pyrosulfite) (K2S2O5)
- E-226 Calcium sulfite (CaSO3)
- E-227 Calcium hydrogen sulfite (calcium bisulfite) (Ca(HSO3)2)
- E-228 Potassium hydrogen
Understanding the Distillation and Production of Spirits
VO. H/ The H of VO can be converted into Russian or Polish versions. Originally, wine was frozen as a primitive version of distillation to subsequently collect the remaining liquid when filtered through charcoal. VO became milder and softer. Lars Olsnon Smith, founder of Absolut VO.
Product/ Wheat and rye are the most common species of grain used in the production of VO, along with potatoes. Aging is not necessary.
Class/ Absolut VO, Smirnoff Red, Black, Sky VO, Grey Goose.
GIN. H/ Produced for the
Read MoreQuantum Physics, Atomic Models, and Chemical Bonds
Quantum Physics and Atomic Models
Max Planck stated that bodies emit and absorb energy in discrete packets called energy quanta: E = hv.
Hertz observed that when metal electrodes are illuminated with ultraviolet light, they discharge. The emission of electrons from certain metals when exposed to light of a specific wavelength is called the photoelectric effect.
Bohr Model
- Electrons revolve around the nucleus in specific circular orbits without losing energy. These orbits are called stationary orbits.