Able to be broken down naturally by bacteria and other living things
Paper bags are biodegradable, unlike plastic bags.
biodiversityNoun
/ˌbaɪ.oʊ.daɪˈvɜːr.sə.ti/
The variety of different plants and animals living in a particular area
The Amazon rainforest has incredible biodiversity with thousands of species.
carbon footprintNoun
/ˈkɑːr.bən ˈfʊt.prɪnt/
The amount of carbon dioxide someone or something produces through daily activities
Taking public transport instead of driving reduces your carbon footprint.
climate changeNoun
/ˈklaɪ.mət tʃeɪndʒ/
Long-term changes in Earth's weather patterns, especially global warming
Climate change is causing more extreme weather like stronger hurricanes.
conservationNoun
/ˌkɑːn.sərˈveɪ.ʃən/
The protection and careful use of natural resources and the environment
Water conservation is important during the summer when there is less rain.
deforestationNoun
/diːˌfɔːr.ɪˈsteɪ.ʃən/
The cutting down of large areas of forest
Deforestation in the Amazon is destroying the homes of many animals.
eco-friendlyAdjective
/ˈiː.koʊ ˈfrend.li/
Not harmful to the environment
She always buys eco-friendly cleaning products to protect nature.
ecologicalAdjective
/ˌiː.kəˈlɑː.dʒɪ.kəl/
Related to the environment and the relationship between living things and their surroundings
The oil spill caused serious ecological damage to the ocean.
ecosystemNoun
/ˈiː.koʊˌsɪs.təm/
All the plants, animals, and their environment in a particular area working together
A coral reef ecosystem includes fish, plants, and coral living together.
endangeredAdjective
/ɪnˈdeɪn.dʒərd/
In danger of disappearing or becoming extinct
Pandas are endangered animals that need our protection.
fossil fuelsNoun
/ˈfɑː.səl fjuːlz/
Energy sources like oil, coal, and gas that formed from ancient plants and animals
Many countries are trying to use less fossil fuels and more clean energy.
greenhouse effectNoun
/ˈɡriːn.haʊs ɪˈfekt/
The process where gases in the atmosphere trap heat from the sun, warming the Earth
The greenhouse effect is natural, but human activities are making it stronger.
hazardousAdjective
/ˈhæz.ər.dəs/
Dangerous and likely to cause harm
Factory workers must wear special clothes when handling hazardous materials.
organicAdjective
/ɔːrˈɡæn.ɪk/
Grown or produced without using artificial chemicals or pesticides
Organic vegetables are healthier because they contain no harmful chemicals.
pristineAdjective
/prɪˈstiːn/
In perfect, original condition; completely clean and unspoiled
The national park has pristine forests that have never been cut down.
renewableAdjective
/rɪˈnuː.ə.bəl/
Able to be replaced naturally and used again, like wind or solar energy
Wind power is a renewable energy source that never runs out.
reusableAdjective
/riːˈuː.zə.bəl/
Able to be used again many times
I bring a reusable water bottle to school instead of buying plastic ones.
sustainableAdjective
/səˈsteɪ.nə.bəl/
Able to continue for a long time without harming the environment or using up natural resources
Solar energy is a sustainable way to power our homes.
toxicAdjective
/ˈtɑːk.sɪk/
Poisonous and harmful to living things
The factory released toxic waste into the river, killing many fish.
vulnerableAdjective
/ˈvʌl.nər.ə.bəl/
Easily hurt or damaged; at risk
Small islands are vulnerable to rising sea levels caused by climate change.
🔗
Vocabulary Matching
Match the vocabulary word with its correct definition.
#
Ans.
Word
Definition
✏️
Fill in the Blank
Complete each sentence with the correct word from the word bank.
🃏
Flashcards Multiple Choice
1 / 20
✍️
Complete the Sentences
Use the vocabulary words to complete the sentences below. You may change the tense of the word, change it from singular to plural, and add prepositions or other connectors as needed for grammatical accuracy. Sentences with one blank must use a vocabulary word in the blank. Sometimes multiple vocabulary options may be correct. Sentences with two blanks must include a vocabulary word in one of the blanks, but you may use whatever words you want in the other blank.
Using participial and verbal phrases to create sentence variety and conciseness
A RAV is a shortened (reduced) form of an adverb clause or verbal phrase that adds detail to a sentence without requiring a full clause. RAVs eliminate unnecessary words, making writing more sophisticated and fluid.
RAV = A participial phrase, infinitive phrase, or reduced adverb clause that modifies the subject of the sentence. It typically begins with a present participle (-ing), past participle (-ed / -en), or an infinitive (to + verb).
Types of RAVs
1. Present Participial Phrase (–ing): Shows an action happening at the same time as the main verb.
Full clause: Because she studied all night, Maria aced the exam.RAV: Having studied all night, Maria aced the exam.
2. Past Participial Phrase (–ed / –en): Shows a completed or passive action.
Full clause: Because he was exhausted from the hike, James collapsed on the sofa.RAV: Exhausted from the hike, James collapsed on the sofa.
3. Infinitive Phrase (to + verb): Typically shows purpose.
RAV: To improve her vocabulary, Layla reads a chapter every night.
⚠ Watch out for dangling modifiers! The RAV must modify the subject of the main clause. “Running through the park, the trees looked beautiful” is incorrect because the trees weren’t running.
Appositives
Renaming and adding essential detail right beside a noun
An appositive is a noun or noun phrase placed next to another noun to rename, identify, or describe it. Appositives add information efficiently, eliminating the need for a separate sentence.
Two kinds:
• Nonrestrictive (nonessential): Extra info — set off with commas. Can be removed without changing the sentence’s meaning.
• Restrictive (essential): Needed to identify the noun — no commas.
Nonrestrictive Appositives
Ms. Carter, our biology teacher, assigned a 10-page research paper.The Nile, the longest river in Africa, flows northward into the Mediterranean.
Restrictive Appositives
The poet Robert Frost wrote “The Road Not Taken.”My friend Daniel is moving to Portland.
Notice that no commas surround restrictive appositives because the information is essential to identifying the noun.
💡 Tip: If you can remove the appositive and the reader still knows exactly who or what you mean, it’s nonrestrictive — use commas. If its removal creates ambiguity, it’s restrictive — no commas.
Complex-Compound Sentences
Combining coordination and subordination for sophisticated sentence craft
A compound-complex sentence contains at least two independent clauses and at least one dependent (subordinate) clause. It blends the strengths of compound sentences (showing equal ideas) with complex sentences (showing relationships like cause, time, or condition).
Formula: Independent Clause + Independent Clause + Dependent Clause (in any order)
Building Blocks
Independent clause (IC): A complete thought that can stand alone. The storm arrived.
Dependent clause (DC): Begins with a subordinating conjunction (because, although, when, if, while, since…) or a relative pronoun — cannot stand alone. When the storm arrived…
DC + IC, conj. IC: Although the deadline was tight, the team finished the project, and they celebrated afterward.IC, conj. IC + DC: Sarah studied hard, and she passed the exam because she stayed focused.IC + DC, conj. IC: The company thrived while the economy struggled, but investors remained cautious.
💡 Key punctuation rule: Use a comma before the coordinating conjunction that joins two independent clauses. Use a comma after an introductory dependent clause. No comma before a dependent clause that follows an independent clause (unless it’s nonessential).
Punctuation Essentials
Commas, semicolons, colons, dashes, and more — and when to use each
Commas
Compound sentence: Use a comma before FANBOYS joining two independent clauses. I finished the book, and I started a new one.
Introductory element: After an introductory phrase or clause. After the rain stopped, we went outside.
Series/list: Between items (use the Oxford comma). We bought apples, bananas, and grapes.
Nonessential elements: Around appositives, nonrestrictive clauses, and parenthetical expressions.
Semicolons
Join related ICs: The concert was sold out; we watched the livestream instead.With conjunctive adverbs: She trained for months; however, the race was canceled.
Colons
Use a colon after an independent clause to introduce a list, explanation, or elaboration.
She packed three essentials: a flashlight, a compass, and a map.
Dashes & Parentheses
Em dashes (—) add emphasis or set off a dramatic aside. Parentheses downplay inserted information.
The final score—a shocking 42 to 7—left the crowd speechless.The experiment (conducted over three months) yielded surprising results.
⚠ Common error: Never use a comma to join two independent clauses without a coordinating conjunction. That’s a comma splice. Use a semicolon, a period, or add a conjunction.
Parallel Structure
Keeping grammatical forms balanced for clarity and rhythm
Parallel structure (parallelism) means using the same grammatical form for items in a series, comparisons, or paired expressions. It creates balance, clarity, and a pleasing rhythm.
Rule: Items joined by coordinating conjunctions or correlative conjunctions (both…and, either…or, neither…nor, not only…but also) must match in grammatical form.
Fixing Faulty Parallelism
✗ Not parallel: She likes hiking, swimming, and to bike.✓ Parallel: She likes hiking, swimming, and biking.
✗ Not parallel: The coach told the players to eat well, to sleep enough, and that they should practice daily.✓ Parallel: The coach told the players to eat well, to sleep enough, and to practice daily.
Parallelism with Correlative Conjunctions
✗ She is not only a talented singer but also plays guitar.✓ She is not only a talented singer but also a skilled guitarist.
💡 Quick test: Stack the parallel items vertically. Do they all start with the same type of word (noun, verb, adjective, phrase type)? If not, revise until they match.
Embedding Quotes
Integrating source material smoothly and correctly
Effective academic and professional writing requires weaving quotations into your own sentences rather than dropping them in without context. A well-embedded quote flows naturally within the grammar of your sentence.
Three Methods of Embedding
1. Full-sentence introduction with a colon:
Dr. King stated his vision clearly: “Injustice anywhere is a threat to justice everywhere.”
2. Signal phrase with a comma:
According to the report, “renewable energy investments grew by 17% in 2025.”
3. Blended (no comma — the quote completes your sentence):
The author argues that modern education must focus on teaching students “how to think, not what to think.”
Key Rules
Periods and commas always go inside closing quotation marks (in American English).
Semicolons and colons always go outside closing quotation marks.
Question marks and exclamation points go inside if they’re part of the quote, outside if they’re part of your sentence.
Use brackets [ ] to change a word for grammatical fit: The study showed that “[participants] responded positively.”
Use ellipses (…) to indicate omitted words from the middle of a quote.
A quote within a quote uses single quotation marks: She said, “I loved the poem ‘The Road Not Taken.’”
⚠ Avoid dropped quotes! Never place a quotation as a standalone sentence without introduction. Always provide context with a signal phrase or blend it into your sentence.
📝 Comprehension Quiz
Select the best answer for each question, then click Check Answers to see your score.
Small talk is the foundation on which good rapport and deeper connections are built.
1. The F.O.R.D. Method
If you’re stuck for what to say, use the F.O.R.D. framework to find safe, engaging topics that people love to talk about:
Letter
Topic
Example Questions
F
Family
“Do you have any family in the area?” / “Are you from around here?”
O
Occupation
“What do you do for work?” / “How did you get into that field?”
R
Recreation
“What do you like to do for fun?” / “Have you seen any good movies lately?”
D
Dreams
“Where is the next place on your travel bucket list?” / “What’s a project you’re excited about?”
2. The Power of Open-Ended Questions
The fastest way to kill a conversation is with a “yes/no” question. Instead, ask questions that invite a story or an opinion.
❌ Closed: “Do you like this event?” ✅ Open: “What’s been the most interesting part of the event for you so far?”
❌ Closed: “Are you having a good day?” ✅ Open: “What’s been the highlight of your week?”
3. The “Statement-Question” Technique
Avoid making the conversation feel like an interview. Share a small piece of information about yourself first to build trust, then follow up with a question.
“I’ve never been to this part of the city before, it’s really beautiful. Do you live nearby or did you travel in for this?”
4. Active Listening & “The Hook”
Listen for “hooks”—small details the other person mentions that you can use to expand the conversation.
They say: “I’m a bit tired, I just got back from a hiking trip.”
The Hook: “A hiking trip? Where did you go? I’ve been looking for some new trails to explore.”
5. Body Language & Etiquette
How you present yourself is as important as what you say. Focus on these three pillars:
Eye Contact:Maintain friendly, relaxed eye contact to show you are present.
The Smile:A genuine smile makes you appear approachable and trustworthy.
The Exit:Leave on a high note. “It was so great meeting you! I’m going to go grab another drink, but I hope to see you later.”
The placement of the “to be” verb (am, is, are, was, were) in relation to question words (who, what, where, when, why, how, which, whose) depends on whether the question is direct or indirect, and whether the question word is part of a larger phrase.
1. When to Put “To Be” Immediately After the Question Word
In Direct Questions, we use a process called inversion. This means the verb comes before the subject. When “to be” is the main verb or the auxiliary verb, it typically follows the question word directly.
A. When “To Be” is the Main Verb
If you are asking about a state, identity, or location where “to be” is the only verb, it follows the question word.
Question Word
“To Be” Verb
Subject
Example
Where
is
the library?
Where is the library?
Who
are
those people?
Who are those people?
Why
was
he late?
Why was he late?
What
is
your name?
What is your name?
B. When “To Be” is an Auxiliary Verb
In the Present Continuous or Past Continuous tenses, “to be” acts as a helping verb. It still follows the question word.
What are you doing?
Where was she going?
Who is calling you?
2. When NOT to Put “To Be” Immediately After the Question Word
There are three primary scenarios where the “to be” verb does not follow the question word immediately.
A. Indirect (Embedded) Questions
This is the most common mistake for English learners. When a question is “hidden” inside another sentence or follows a polite opening, we use statement word order (Subject + Verb). We do not use inversion.
Direct Question (Inversion)
Indirect Question (Statement Order)
Where is he?
Do you know where he is?
What is the time?
Could you tell me what the time is?
Why were they angry?
I wonder why they were angry.
Who is that man?
I don’t know who that man is.
Rule of Thumb: If the sentence starts with “Do you know…”, “I wonder…”, or “Tell me…”, the “to be” verb usually moves to the end of the clause.
B. Question Word + Noun/Adjective Phrases
Sometimes the question word is part of a larger phrase. In these cases, the “to be” verb follows the entire phrase, not just the question word.
How old is your brother? (Not: How is old…)
Which book is yours? (Not: Which is book…)
What color was the car?
Whose bag are these?
C. Subject Questions (with specific emphasis)
In most subject questions with “to be,” the verb still follows the question word (e.g., “Who is the boss?”). However, if you are using “to be” as an auxiliary in a complex sentence where the question word is the subject, the order remains Subject + Verb.
Who is coming to the party? (“Who” is the subject, “is” follows it).
What is happening?
3. Summary Table: Direct vs. Indirect
Scenario
Structure
Example
Direct Question
Question Word + Be + Subject
Why is it cold?
Indirect Question
Phrase + Question Word + Subject + Be
I don’t know why it is cold.
Noun Phrase
[Q-Word + Noun] + Be + Subject
What time is the meeting?
Adjective Phrase
[Q-Word + Adj] + Be + Subject
How far is the station?
4. Common Pitfalls to Avoid
Correct: How cold is the water?
The “Do” Confusion: Never use “do/does/did” with the “to be” verb in a question.
Incorrect: Where does he be?
Correct: Where is he?
Forgetting to Revert in Indirects:
Incorrect: I asked him where is the station.
Correct: I asked him where the station is.
Splitting the Phrase:
Incorrect: How is the water cold? (Unless you mean “In what way is the water cold?”)