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Spell Bee Word: Theory


What does theory mean?

Word: Theory

Part of Speech: Noun

Meaning: Theory means an idea that tries to explain why or how something happens. Scientists test a theory to see if it is right.

Synonyms: explanation

How do you spell theory?

Syllables: the - o - ry

Tricky part: After th comes e and then o, and that o is hardly heard. Children often fill the gap with the wrong vowel or add an extra one.

Watch out for: theery, thery, teory

Memory tip: Draw a big round O in the middle of theory, like a thought bubble.

Theory in a sentence

Example 1: Kavya has a theory about why the milk keeps boiling over.

Example 2: We learnt the theory first and then did the experiment.

Example 3: My theory is that the cat ate the missing biscuits.

Fun Fact

Theory comes from the Greek theoria, meaning looking at or watching. A theory is a way of looking at a problem.

Practise the CREST Way

Spell-o-Spell

Choose the incorrectly spelt word:

a) experiment
b) planet
c) theorie
d) science

Show answer

c) theorie. Theory ends in a plain y, like story.

Word Connection

Choose the antonym of the word: theory

a) belief
b) guess
c) idea
d) practice

Show answer

d) practice. Theory is thinking about how something works; practice is actually doing it.

Word Cookie

Find the extra letter in the word:

theorry

a) y
b) o
c) h
d) r

Show answer

d) r. Theory has a single r, just as story does.

Multiple Choice Questions

1. Which of these is a theory?

a) We bought the plant on Sunday.
b) I think it wilted from lack of sun.
c) Please water the plant daily.
d) The plant sits by the window.

Show answer

b) I think it wilted from lack of sun.

2. The scientist has a theory about why the lake turns green. This means she ____.

a) has an idea to explain it
b) has cleaned the lake
c) has never seen it
d) knows it for certain

Show answer

a) has an idea to explain it

Associated Words

supposecontentmentacquirewisdomcampfire
shamecommitgoodislandadvantage

Next steps

How to participate in CREST International Spell Bee

The CREST International Spell Bee (CSB) is conducted in two editions – CREST International Spell Bee - Summer (CSB) and CREST International Spell Bee - Winter (CSBW) – giving students across the globe an opportunity to showcase and enhance their spelling proficiency. Designed for young learners from Senior KG to Class 8, the competition focuses on word-building, pronunciation, and vocabulary enrichment, helping students develop strong linguistic skills.

Steps to Participate:

Step 1: Visit the registration page and complete the registration with your desired subject.

Step 2: After Registration done, do login at www.crestolympiads.com/login.

Step 3: After login, go to dashboard and click on Book slot/Take Exam

Step 4: Schedule your exam date and preferred time.

Step 5: Log in with your credentials on the exam day at the scheduled time and take the exam.

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