Let's solve each question step by step based on the content of the worksheet and general scientific knowledge.
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1. What is Galaxy?
A
galaxy is a massive system of stars, gas, dust, and dark matter bound together by gravity. Galaxies can contain billions to trillions of stars and are often grouped into clusters or superclusters.
✔ Answer: A galaxy is a large group of stars, gas, dust, and dark matter held together by gravity.
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2. What is the name of our galaxy?
Our galaxy is called the
Milky Way.
✔ Answer: Milky Way
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3. How many types of galaxies are there?
There are
three main types of galaxies:
- Spiral galaxies
- Elliptical galaxies
- Irregular galaxies
✔ Answer: 3 (Spiral, Elliptical, Irregular)
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4. What is the Big Bang theory?
The
Big Bang theory is the leading explanation for how the universe began. It states that the universe started from an extremely hot and dense point approximately 13.8 billion years ago and has been expanding ever since.
✔ Answer: The Big Bang theory is the idea that the universe began with a massive explosion and has been expanding ever since.
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5. Name the galaxies
We are given three images and asked to match them with the correct type:
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Image 1 (Top left):
- Shows a spiral shape with arms rotating around a central bulge.
➡️ This is a
Spiral galaxy.
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Image 2 (Top right):
- Has an oval or round shape, smooth and featureless appearance.
➡️ This is an
Elliptical galaxy.
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Image 3 (Bottom left):
- Appears chaotic, with no clear structure or symmetry.
➡️ This is an
Irregular galaxy.
✔ Answers:
- Top left:
Spiral galaxy
- Top right:
Elliptical galaxy
- Bottom left:
Irregular galaxy
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✔ Final Answers Summary:
1.
Galaxy: A large system of stars, gas, dust, and dark matter held together by gravity.
2.
Our galaxy: Milky Way
3.
Types of galaxies: 3 (Spiral, Elliptical, Irregular)
4.
Big Bang theory: The universe began from a hot, dense point and has been expanding since.
5.
Name the galaxies:
- First image:
Spiral galaxy
- Second image:
Elliptical galaxy
- Third image:
Irregular galaxy
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Parent Tip: Review the logic above to help your child master the concept of big bang theory worksheet.
