Science Grade 4 activity - Free Printable

Let's solve the problems step by step:

---

Section 1: Vertebrates and Animals

1. Vertebrates are animals with _______________.
- Answer: backbones (or spinal columns)

2. Mammals and ____________ are warm-blooded vertebrates.
- Answer: birds

3. I am cold-blooded, breathe through lungs, and have dry scaly skin. What am I?
- Answer: reptile (e.g., snakes, lizards)

4. I am a mammal but lay eggs. What am I?
- Answer: platypus or echidna (monotremes)

5. I live in water and can breathe underwater through gills.
- Answer: fish

---

Section 2: Labeling Parts of the Plant

The plant diagram shows different parts that need to be labeled using the words provided: Fruit, Leaf, Flower, Root, Stem.

- Top part (yellow structure): Flower
- Red structures hanging from the plant: Fruit
- Green structures attached to the stem: Leaf
- Main vertical structure supporting the plant: Stem
- Underground structures: Root

So the labels are:
- Top: Flower
- Hanging red structures: Fruit
- Green structures: Leaf
- Vertical structure: Stem
- Underground: Root

---

Section 3: Plant Growth and States of Matter

11. To grow healthily, plants need air, water, nutrients, and _____________.
- Answer: sunlight

12. __________ have a fixed shape but (13) __________ take the shape of the container.
- Answer for 12: solids
- Answer for 13: liquids

14. When a liquid is heated, it ___________ faster.
- Answer: evaporates

15. Water freezes at __________ degrees Celsius.
- Answer: 0

16. Salt ____________ in water.
- Answer: dissolves

17. Stone is ____________ in water.
- Answer: insoluble

18. ___________ is the best way to separate mixed buttons and paperclips.
- Answer: magnet (paperclips are magnetic, buttons are not)

19. A ____________ is ideal to separate coffee from water.
- Answer: filter

20. A ____________ can be used to separate pins from buttons.
- Answer: sieve (pins are smaller and will pass through, while buttons are larger and will stay behind)

---

Final Answers:

1. backbones (or spinal columns)
2. birds
3. reptile
4. platypus or echidna
5. fish
6-10: Labels for the plant diagram:
- Top: Flower
- Hanging red structures: Fruit
- Green structures: Leaf
- Vertical structure: Stem
- Underground: Root
11. sunlight
12. solids
13. liquids
14. evaporates
15. 0
16. dissolves
17. insoluble
18. magnet
19. filter
20. sieve

---

Boxed Final Answer:

\[
\boxed{
\text{1. backbones (or spinal columns), 2. birds, 3. reptile, 4. platypus or echidna, 5. fish, 6-10: Flower, Fruit, Leaf, Stem, Root, 11. sunlight, 12. solids, 13. liquids, 14. evaporates, 15. 0, 16. dissolves, 17. insoluble, 18. magnet, 19. filter, 20. sieve}
}
\]