Science Grade 4 activity - Free Printable

Let’s go through each question one by one and fill in the blanks with the correct science answers.

---

1. Vertebrates are animals with ________________.
→ Vertebrates have a backbone (or spine). That’s what makes them different from insects or worms.

2. Mammals and ________________ are warm blooded vertebrates.
→ Birds are also warm-blooded, like mammals. So the answer is “birds”.

3. I am cold blooded, breathe through lungs and have dry scaly skin:
→ This describes reptiles — like snakes or lizards.

4. I am a mammal but lay eggs. What am I?
→ Only two mammals lay eggs: the platypus and the echidna. The most common answer expected here is “platypus”.

5. I live in water and can breathe under water through gills.
→ Fish do this! They use gills to get oxygen from water.

---

Now for questions 6–10: Label the plant parts using these words: Fruit, Leaf, Flower, Root, Stem

Looking at the diagram:

- Top box pointing to green flat parts → Leaf
- Box below that pointing to yellow blooms → Flower
- Box on right pointing to red round things → Fruit
- Box below that pointing to green stalks holding fruit → Stem
- Bottom box pointing to underground part → Root

So order from top to bottom labels:
Top left: Leaf
Below that: Flower
Right middle: Fruit
Below that: Stem
Bottom: Root

Wait — let’s match the boxes as they appear in the image layout:

Actually, looking again:

The diagram has 5 blank boxes:

- Two on the left side (top and middle)
- Two on the right side (middle and lower)
- One at the bottom

From top to bottom, left to right:

Left top box → points to leaf → Leaf
Left middle box → points to flower → Flower
Right upper box → points to tomato (fruit) → Fruit
Right lower box → points to stem branch → Stem
Bottom box → points to roots → Root

Yes, that matches.

---

11. To grow healthily plants need air, water, nutrients and ________________.
→ Plants also need sunlight to make food (photosynthesis). So: sunlight

12. ________________ have a fixed shape but (13) ________________ take the shape of the container.
→ Solids keep their shape. Liquids take the shape of their container.
So:
12. Solids
13. liquids

14. When a liquid is heated it ________________ faster.
→ It evaporates faster. Heat makes molecules move quicker and turn into gas.

15. Water freezes at ________________ degrees celsius.
→ 0°C — that’s basic science fact.

16. Salt ________________ in water.
→ Salt dissolves in water. You can’t see it anymore, but it’s still there.

17. Stone is ________________ in water.
→ Stone does NOT dissolve. It sinks and stays solid. So: insoluble or “does not dissolve” — but since we’re filling blanks simply, probably “not soluble” or just “insoluble”. But in elementary terms, maybe “doesn’t dissolve”. However, the pattern suggests single word or short phrase. Let’s say: insoluble

But wait — sometimes they expect “sinks” or “does not dissolve”. Looking at context, Q16 says “Salt ___ in water” → likely “dissolves”, so Q17 should be opposite → “does not dissolve” or “is insoluble”. Since it’s a blank, and previous was “dissolves”, this should be “does not dissolve”. But to fit neatly, perhaps “insoluble” is acceptable. However, for young students, better to say: does not dissolve

But let’s check standard curriculum — often they use “soluble” and “insoluble”. I’ll go with insoluble for consistency.

Actually, rethinking — if Q16 is “Salt dissolves in water”, then Q17 “Stone is ______ in water” — best fit is “insoluble”. Yes.

18. ________________ is the best way to separate mixed buttons and paperclips.
→ Paperclips are metal, buttons usually aren’t. Use a magnet! Magnet pulls out paperclips.

19. A ________________ is ideal to separate coffee from water.
→ If you’ve made coffee grounds in water, you filter it. So: filter or “coffee filter” — but simplest is filter

20. A ________________ can be used to separate pins from buttons.
→ Pins are metal, buttons may not be. Again, use a magnet

Wait — same as Q18? Possibly. Or maybe sieve? But pins and buttons might be similar size. Magnet is best if pins are steel.

Assuming pins are magnetic, yes — magnet

But let’s confirm all answers now.

---

Final Answers Compiled:

1. backbone
2. birds
3. reptile
4. platypus
5. fish
6. Leaf
7. Flower
8. Fruit
9. Stem
10. Root
11. sunlight
12. Solids
13. liquids
14. evaporates
15. 0
16. dissolves
17. insoluble
18. Magnet
19. filter
20. magnet

Wait — Q17: “Stone is ________________ in water.”
If we said “insoluble”, that’s correct scientifically. But some curricula might prefer “does not dissolve”. However, since Q16 uses “dissolves”, using “insoluble” keeps parallel structure.

Also, Q4: “I am a mammal but lay eggs. What am I?” — while echidna also lays eggs, “platypus” is more commonly taught at this level.

Q19: “separate coffee from water” — if it’s brewed coffee (liquid), you don’t separate; but if it’s grounds, you filter. So “filter” is correct.

Q20: pins and buttons — if pins are metal, magnet works. If both non-magnetic, maybe sieve — but typically pins are steel. So magnet is fine.

All set.

Final Answer:
1. backbone
2. birds
3. reptile
4. platypus
5. fish
6. Leaf
7. Flower
8. Fruit
9. Stem
10. Root
11. sunlight
12. Solids
13. liquids
14. evaporates
15. 0
16. dissolves
17. insoluble
18. Magnet
19. filter
20. magnet