Science online Exam worksheet - Free Printable

Let's solve each part of this science exam step by step and explain the solutions clearly.

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1. Life Cycle of a Butterfly

Task: Drag the correct image to match each stage of the butterfly life cycle.

The stages in order are:
1. Butterfly egg
2. Caterpillar (larva)
3. Pupa (chrysalis)
4. Adult butterfly

Now, let’s match the images:

- Butterfly egg: The small white dot on the leaf → This is the egg.
- Caterpillar: The yellow worm-like creature on the leaf → This is the caterpillar.
- Pupa: The green cocoon hanging from a twig → This is the pupa or chrysalis.
- Adult butterfly: The orange and black winged insect → This is the adult butterfly.

✔ Correct Matching:
- Butterfly egg → Image of egg on leaf
- Caterpillar → Image of caterpillar on leaf
- Pupa → Image of green chrysalis
- Adult butterfly → Image of flying butterfly

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2. Match the Vocabulary Words with the Picture

We have three pictures and three vocabulary terms:
- Direct development
- Metamorphosis
- Life Cycle

Let’s analyze each picture:

#### Picture 1: Chickens (egg → chick → adult chicken)
- This shows a simple transformation where the young looks like a smaller version of the adult.
- There is no major physical change in form.
- This is an example of Direct development.

✔ Match: Chicken cycle → Direct development

#### Picture 2: Bear (baby bear → adult bear)
- Baby bear looks like a small version of the adult bear.
- No dramatic change in body structure.
- Also an example of Direct development.

Wait! But there are only three vocabulary words, and we have three pictures. Let's recheck.

Actually, both chickens and bears show direct development, but here's the key:
- Metamorphosis is when an organism undergoes a complete or partial transformation in form (like a caterpillar becoming a butterfly).
- Life Cycle refers to the entire sequence of stages an organism goes through from birth to reproduction.

So let's re-analyze:

- Chicken cycle → Shows stages from egg to chick to adult → This is a life cycle.
- Bear pictures → Show baby bear growing into adult → This is direct development.
- Butterfly cycle → Shows egg → caterpillar → pupa → butterfly → This is metamorphosis.

Wait — but the third picture is butterflies hanging in chrysalis → that’s metamorphosis.

So:

- Chicken diagram → Shows a life cycle (stages of development)
- Bear pictures → Show direct development (young look like adults)
- Butterfly chrysalis → Shows metamorphosis

✔ Correct matching:

- Chicken cycle → Life Cycle
- Bear pictures → Direct development
- Butterfly chrysalis → Metamorphosis

> Note: The term "Life Cycle" is broad and applies to all organisms, but here it's being used to describe the sequence of stages shown in the chicken diagram. So it fits best with the chicken cycle.

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3. Organisms can:

Task: Type the correct answer above the pictures.

There are three pictures:

1. Newborn baby → Represents human development
2. Chick hatching from egg → Represents birth from egg
3. Dandelion seed dispersal → Represents reproduction and spread

The sentence says: "Organisms can:"

We need to fill in what organisms can do based on these images.

Let’s think about the common theme:

- Babies grow and develop → grow and develop
- Chicks hatch → reproduce or be born
- Dandelion seeds fly away → spread their seeds → reproduce

So the three main things organisms can do:

1. Grow and develop → newborn baby
2. Reproduce → chick hatching (new life), dandelion spreading seeds
3. Disperse offspring → dandelion

But since there are three boxes, and likely one word per box, we need to find three general abilities.

Looking at the images:

- Baby → Grow
- Chick hatching → Be born
- Dandelion → Reproduce / Disperse seeds

But the phrase is “Organisms can:” so we need verbs.

A better interpretation:

- Baby → Develop or Grow
- Chick → Hatch or Be born
- Dandelion → Reproduce or Disperse seeds

But perhaps the intended answers are:

- Grow → baby
- Reproduce → chick (new life), dandelion (seeds)
- Survive? Not quite.

Alternatively, the three boxes might represent:

1. Birth → chick hatching
2. Growth → baby
3. Reproduction → dandelion

But the baby isn't reproducing yet.

Wait — maybe the dandelion represents reproduction, the chick represents birth, and the baby represents development.

But the sentence is: "Organisms can:" and then three blanks.

Best fit:

- Grow → baby
- Be born → chick
- Reproduce → dandelion

But "be born" is not a verb for the organism itself — it's passive.

Better: Think of what all organisms can do.

Common biological processes:

- Grow
- Reproduce
- Respond to stimuli?

But the images don’t show response.

Alternative idea:

The dandelion shows dispersal of seeds → part of reproduction
The chick shows hatching → birth
The baby shows infancy → growth

So likely the intended answers are:

1. Grow → baby
2. Be born → chick
3. Reproduce → dandelion

But again, "be born" is not something an organism *does* — it happens to it.

Better: Think of the processes.

Perhaps the answer is:

- Develop → baby
- Hatch → chick
- Spread seeds → dandelion

But that’s too specific.

Wait — the dandelion is showing seed dispersal, which is reproduction.

The chick is showing birth.

The baby is showing early development.

But the most logical general biological abilities are:

- Grow
- Reproduce
- Survive

But survival isn't directly shown.

Another possibility: The three boxes represent stages of life:

- Born → chick
- Grow → baby
- Reproduce → dandelion

Yes — that makes sense.

So the sentence would be:

Organisms can: Be born, Grow, Reproduce

So:

- Yellow box (baby) → Grow
- Blue box (chick) → Be born
- Pink box (dandelion) → Reproduce

✔ Final Answer:

- Grow → over the baby
- Be born → over the chick
- Reproduce → over the dandelion

Or more naturally:

- Grow → baby
- Hatch → chick
- Disperse seeds → dandelion

But since it says "Organisms can:", the most accurate general terms are:

👉 Grow, Be born, Reproduce

So:

- Baby → Grow
- Chick → Be born
- Dandelion → Reproduce

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✔ Final Answers:

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#### 1. Life Cycle of a Butterfly

| Label | Correct Image |
|-----------------|---------------|
| Butterfly egg | Egg on leaf |
| Caterpillar | Worm on leaf |
| Pupa | Green chrysalis |
| Adult butterfly | Flying butterfly |

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#### 2. Match Vocabulary

- Chicken cycle → Life Cycle
- Bear pictures → Direct development
- Butterfly chrysalis → Metamorphosis

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#### 3. Organisms can:

- Grow → over the baby
- Be born → over the chick
- Reproduce → over the dandelion

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📝 Explanation Summary:

- Butterfly life cycle follows complete metamorphosis: egg → larva (caterpillar) → pupa → adult.
- Direct development: Young resemble adults (e.g., humans, bears).
- Metamorphosis: Dramatic change in form (e.g., caterpillar to butterfly).
- Life cycle: The entire sequence of stages from birth to death.
- Organisms can grow, be born, and reproduce — these are fundamental biological processes shown in the images.

Let me know if you'd like this formatted as a printable answer sheet!