Science Grade 4 activity - Free Printable
Educational worksheet: Science Grade 4 activity. Download and print for classroom or home learning activities.
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Show Answer Key & Explanations
Step-by-step solution for: Science Grade 4 activity
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Show Answer Key & Explanations
Step-by-step solution for: Science Grade 4 activity
Here’s the completed worksheet with answers and explanations for each question:
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1. Vertebrates are animals with _a backbone (or spinal column)_.
✔ Explanation: Vertebrates are defined by having an internal skeleton with a backbone that protects the spinal cord. Examples include mammals, birds, reptiles, amphibians, and fish.
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2. Mammals and _birds_ are warm-blooded vertebrates.
✔ Explanation: Warm-blooded animals (endotherms) can regulate their own body temperature. Only mammals and birds are warm-blooded among vertebrates. Reptiles, amphibians, and fish are cold-blooded.
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3. I am cold blooded, breathe through lungs and have dry scaly skin: _I am a reptile._
✔ Explanation: Reptiles are cold-blooded, breathe air using lungs, and have dry, scaly skin to prevent water loss. Snakes, lizards, turtles, and crocodiles are examples.
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4. I am a mammal but lay eggs. What am I? _A platypus or echidna (monotreme)._
✔ Explanation: Most mammals give birth to live young, but monotremes (like the platypus and echidna) are egg-laying mammals — a rare exception in the animal kingdom.
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5. I live in water and can breathe under water through gills. _I am a fish._
✔ Explanation: Fish are aquatic vertebrates that use gills to extract oxygen from water. They are cold-blooded and typically have fins and scales.
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6–10. Label the parts of the plant:
*(From top to bottom, left to right based on standard tomato plant diagram)*
- Top left arrow → Flower
- Second from top left → Leaf
- Right side, top → Fruit
- Right side, bottom → Stem
- Bottom left → Root
✔ Explanation:
- Flower: Reproductive part, produces seeds.
- Leaf: Site of photosynthesis.
- Fruit: Contains seeds; develops from flower.
- Stem: Supports plant and transports water/nutrients.
- Root: Anchors plant and absorbs water/minerals.
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11. To grow healthily plants need air, water, nutrients and _sunlight_.
✔ Explanation: Sunlight is essential for photosynthesis — the process plants use to make their own food.
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12. _Solids_ have a fixed shape but (13) _liquids_ take the shape of the container.
✔ Explanation:
- Solids maintain their own shape.
- Liquids flow and conform to the shape of their container.
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14. When a liquid is heated it _evaporates_ faster.
✔ Explanation: Heating increases the kinetic energy of molecules, causing them to escape as vapor more quickly.
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15. Water freezes at _0_ degrees Celsius.
✔ Explanation: This is the standard freezing point of pure water at sea level.
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16. Salt _dissolves_ in water.
✔ Explanation: Salt (sodium chloride) is soluble in water — it breaks into ions and mixes evenly to form a solution.
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17. Stone is _insoluble_ in water.
✔ Explanation: Stone does not dissolve in water — it remains solid even when submerged.
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18. _Using a magnet_ is the best way to separate mixed buttons and paperclips.
✔ Explanation: Paperclips are usually made of iron or steel (magnetic), while buttons are typically plastic or wood (non-magnetic). A magnet attracts only the paperclips.
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19. A _filter_ is ideal to separate coffee from water.
✔ Explanation: Filtration separates solids (coffee grounds) from liquids (brewed coffee) using a porous barrier like a filter paper or mesh.
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20. A _magnet_ can be used to separate pins from buttons.
✔ Explanation: Pins are often made of metal (iron/steel) and are magnetic; buttons are usually non-metallic. A magnet will attract pins, leaving buttons behind.
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✔ Final Answer Summary:
1. a backbone (or spinal column)
2. birds
3. reptile
4. platypus or echidna (monotreme)
5. fish
6. Flower
7. Leaf
8. Fruit
9. Stem
10. Root
11. sunlight
12. Solids
13. liquids
14. evaporates
15. 0
16. dissolves
17. insoluble
18. Using a magnet
19. filter
20. magnet
Let me know if you’d like this formatted as a printable answer sheet! 🌿🔬
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1. Vertebrates are animals with _a backbone (or spinal column)_.
✔ Explanation: Vertebrates are defined by having an internal skeleton with a backbone that protects the spinal cord. Examples include mammals, birds, reptiles, amphibians, and fish.
---
2. Mammals and _birds_ are warm-blooded vertebrates.
✔ Explanation: Warm-blooded animals (endotherms) can regulate their own body temperature. Only mammals and birds are warm-blooded among vertebrates. Reptiles, amphibians, and fish are cold-blooded.
---
3. I am cold blooded, breathe through lungs and have dry scaly skin: _I am a reptile._
✔ Explanation: Reptiles are cold-blooded, breathe air using lungs, and have dry, scaly skin to prevent water loss. Snakes, lizards, turtles, and crocodiles are examples.
---
4. I am a mammal but lay eggs. What am I? _A platypus or echidna (monotreme)._
✔ Explanation: Most mammals give birth to live young, but monotremes (like the platypus and echidna) are egg-laying mammals — a rare exception in the animal kingdom.
---
5. I live in water and can breathe under water through gills. _I am a fish._
✔ Explanation: Fish are aquatic vertebrates that use gills to extract oxygen from water. They are cold-blooded and typically have fins and scales.
---
6–10. Label the parts of the plant:
*(From top to bottom, left to right based on standard tomato plant diagram)*
- Top left arrow → Flower
- Second from top left → Leaf
- Right side, top → Fruit
- Right side, bottom → Stem
- Bottom left → Root
✔ Explanation:
- Flower: Reproductive part, produces seeds.
- Leaf: Site of photosynthesis.
- Fruit: Contains seeds; develops from flower.
- Stem: Supports plant and transports water/nutrients.
- Root: Anchors plant and absorbs water/minerals.
---
11. To grow healthily plants need air, water, nutrients and _sunlight_.
✔ Explanation: Sunlight is essential for photosynthesis — the process plants use to make their own food.
---
12. _Solids_ have a fixed shape but (13) _liquids_ take the shape of the container.
✔ Explanation:
- Solids maintain their own shape.
- Liquids flow and conform to the shape of their container.
---
14. When a liquid is heated it _evaporates_ faster.
✔ Explanation: Heating increases the kinetic energy of molecules, causing them to escape as vapor more quickly.
---
15. Water freezes at _0_ degrees Celsius.
✔ Explanation: This is the standard freezing point of pure water at sea level.
---
16. Salt _dissolves_ in water.
✔ Explanation: Salt (sodium chloride) is soluble in water — it breaks into ions and mixes evenly to form a solution.
---
17. Stone is _insoluble_ in water.
✔ Explanation: Stone does not dissolve in water — it remains solid even when submerged.
---
18. _Using a magnet_ is the best way to separate mixed buttons and paperclips.
✔ Explanation: Paperclips are usually made of iron or steel (magnetic), while buttons are typically plastic or wood (non-magnetic). A magnet attracts only the paperclips.
---
19. A _filter_ is ideal to separate coffee from water.
✔ Explanation: Filtration separates solids (coffee grounds) from liquids (brewed coffee) using a porous barrier like a filter paper or mesh.
---
20. A _magnet_ can be used to separate pins from buttons.
✔ Explanation: Pins are often made of metal (iron/steel) and are magnetic; buttons are usually non-metallic. A magnet will attract pins, leaving buttons behind.
---
✔ Final Answer Summary:
1. a backbone (or spinal column)
2. birds
3. reptile
4. platypus or echidna (monotreme)
5. fish
6. Flower
7. Leaf
8. Fruit
9. Stem
10. Root
11. sunlight
12. Solids
13. liquids
14. evaporates
15. 0
16. dissolves
17. insoluble
18. Using a magnet
19. filter
20. magnet
Let me know if you’d like this formatted as a printable answer sheet! 🌿🔬
Parent Tip: Review the logic above to help your child master the concept of science worksheet for grade 4.
