The video is a lecture presentation that explains the difference between scalar and vector quantities in physics. The presentation also covers how vector quantities can be combined, with examples of forces acting in the same direction,...

The video is a lecture presentation on variation, specifically discussing the causes and types of variation within populations. They delve into the concept of acquired characteristics and how they do not affect offspring, as well as the...

In this lesson, we will learn about the perfect progressive tense, also known as the perfect continuous te

nse.

In previous lessons, we’ve learned that the PROGRESSIVE TENSE, also called the CONTINUOUS TENSE...

Adverb clauses also known as adverbial clauses function as one part of speech: the adverb. We know that an adverb answer modifies a verb, an adjective, and another adverb. It answers the question “when?”, “where?”, “how?”, “why?” “to...

The video is a lecture presentation on adaptive features in animals and plants. It describes various physical characteristics that help organisms survive and reproduce in their environments, using examples such as the fennec fox and...

Monitoring Heart Rate

The Harvard Printing Press was the Internet of its day. The first of its kind in the US, it kickstarted the publishing industry and helped everyday Americans to stay informed.

In this lesson, you will learn about pronoun case. There are four common pronoun cases: subject, object, possessive, and reflexive. Examples are given. My apologies for the sound. Was having trouble with the mic. :-)

A group of words that may take the place of a part of speech is called a phrase. In an earlier lesson, I explained the seven types of phrases, but in this lesson, I expand on the prepositional phrase. The prepositional phrase is a...

The video is a lecture presentation focused on physical quantities and measurements. The speaker begins by defining what a physical quantity is, and explains how different quantities like length, mass, and volume can be measured using...

The video is a lecture presentation on the topic of the expanding universe. The speaker discusses evidence and the Big Bang theory, which suggests that the universe began from a small, dense region and has been expanding for...

A sentence may consist of only two words, a substantive (noun or pronoun) and a predicate, verb or verb phrase. However, subjects and predicates usually include other words that explain or complete their meaning. Learn about the simple...

Voice is one of the five properties of verbs. The voice of a verb determines whether the subject performs or receives the ac

tion.

In today's lesson, you will learn about the two grammatical voices: active and...