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
Let's solve each question step by step and provide explanations.
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1. Vertebrates are animals with _________________.
✔ Answer: backbones
🔹 *Explanation:* Vertebrates are animals that have a backbone or spinal column, which is made up of vertebrae. This includes mammals, birds, reptiles, amphibians, and fish.
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2. Mammals and _____________ are warm-blooded vertebrates.
✔ Answer: birds
🔹 *Explanation:* Both mammals and birds are warm-blooded (endothermic), meaning they can regulate their body temperature internally. Other vertebrates like reptiles, amphibians, and fish are cold-blooded.
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3. I am cold-blooded, breathe through lungs and have dry scaly skin:
✔ Answer: Reptile
🔹 *Explanation:* Reptiles (like snakes, lizards, turtles) are cold-blooded, breathe air through lungs, and have dry, scaly skin. This distinguishes them from amphibians (which have moist skin) and mammals/birds (which are warm-blooded).
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4. I am a mammal but lay eggs. What am I?
✔ Answer: Monotreme
🔹 *Explanation:* Monotremes are egg-laying mammals. Examples include the platypus and echidna. They are rare exceptions among mammals.
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5. I live in water and can breathe underwater through gills.
✔ Answer: Fish
🔹 *Explanation:* Fish are aquatic animals that use gills to extract oxygen from water. Most fish live entirely in water and have fins and scales.
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6–10. Label the parts of the plant using these words: Fruit, Leaf, Flower, Root, Stem
Looking at the image:
- Top yellow part → Flower
- Green flat structures → Leaf
- Red round things → Fruit
- Green central support → Stem
- Underground structure → Root
✔ Labels:
- Top arrow → Flower
- Middle left → Leaf
- Right side (red) → Fruit
- Bottom right → Leaf (or another leaf)
- Bottom underground → Root
- Central stem → Stem
But based on the arrows:
From top to bottom:
1. Arrow pointing to flower → Flower
2. Arrow pointing to leaves → Leaf
3. Arrow pointing to red tomatoes → Fruit
4. Arrow pointing to green stem → Stem
5. Arrow pointing to roots → Root
So fill in:
- First box (top): Flower
- Second box: Leaf
- Third box (right): Fruit
- Fourth box (right): Stem
- Fifth box (bottom): Root
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11. To grow healthily plants need air, water, nutrients and ________________.
✔ Answer: sunlight
🔹 *Explanation:* Sunlight is essential for photosynthesis, the process by which plants make their own food.
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12. ________ have a fixed shape but (13)________ take the shape of the container.
✔ Answer:
- 12. Solids
- 13. Liquids
🔹 *Explanation:* Solids maintain their shape, while liquids flow and take the shape of their container.
---
14. When a liquid is heated it ____________ faster.
✔ Answer: evaporates
🔹 *Explanation:* Heating increases the kinetic energy of liquid molecules, causing them to escape into the air more quickly as vapor.
---
15. Water freezes at __________ degrees Celsius.
✔ Answer: 0
🔹 *Explanation:* At standard atmospheric pressure, water freezes at 0°C (32°F).
---
16. Salt ____________ in water.
✔ Answer: dissolves
🔹 *Explanation:* Salt dissolves in water because water molecules surround salt ions, breaking them apart and dispersing them.
---
17. Stone is ____________ in water.
✔ Answer: insoluble
🔹 *Explanation:* Stones (like rocks or pebbles) do not dissolve in water — they remain solid and sink.
---
18. ____________ is the best way to separate mixed buttons and paperclips.
✔ Answer: Using a magnet
🔹 *Explanation:* Paperclips are made of metal (usually steel), which is magnetic. Buttons are typically not magnetic. So a magnet can attract paperclips, leaving buttons behind.
---
19. A ____________ is ideal to separate coffee from water.
✔ Answer: filter
🔹 *Explanation:* A filter (like in a coffee maker) allows water to pass through while holding back coffee grounds.
---
20. A ____________ can be used to separate pins from buttons.
✔ Answer: magnet
🔹 *Explanation:* Pins are usually made of metal and are magnetic, while buttons are not. So a magnet will pick up the pins.
---
1. backbones
2. birds
3. reptile
4. monotreme
5. fish
6–10:
- Top: Flower
- Left middle: Leaf
- Right middle: Fruit
- Right lower: Stem
- Bottom: 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!
---
1. Vertebrates are animals with _________________.
✔ Answer: backbones
🔹 *Explanation:* Vertebrates are animals that have a backbone or spinal column, which is made up of vertebrae. This includes mammals, birds, reptiles, amphibians, and fish.
---
2. Mammals and _____________ are warm-blooded vertebrates.
✔ Answer: birds
🔹 *Explanation:* Both mammals and birds are warm-blooded (endothermic), meaning they can regulate their body temperature internally. Other vertebrates like reptiles, amphibians, and fish are cold-blooded.
---
3. I am cold-blooded, breathe through lungs and have dry scaly skin:
✔ Answer: Reptile
🔹 *Explanation:* Reptiles (like snakes, lizards, turtles) are cold-blooded, breathe air through lungs, and have dry, scaly skin. This distinguishes them from amphibians (which have moist skin) and mammals/birds (which are warm-blooded).
---
4. I am a mammal but lay eggs. What am I?
✔ Answer: Monotreme
🔹 *Explanation:* Monotremes are egg-laying mammals. Examples include the platypus and echidna. They are rare exceptions among mammals.
---
5. I live in water and can breathe underwater through gills.
✔ Answer: Fish
🔹 *Explanation:* Fish are aquatic animals that use gills to extract oxygen from water. Most fish live entirely in water and have fins and scales.
---
6–10. Label the parts of the plant using these words: Fruit, Leaf, Flower, Root, Stem
Looking at the image:
- Top yellow part → Flower
- Green flat structures → Leaf
- Red round things → Fruit
- Green central support → Stem
- Underground structure → Root
✔ Labels:
- Top arrow → Flower
- Middle left → Leaf
- Right side (red) → Fruit
- Bottom right → Leaf (or another leaf)
- Bottom underground → Root
- Central stem → Stem
But based on the arrows:
From top to bottom:
1. Arrow pointing to flower → Flower
2. Arrow pointing to leaves → Leaf
3. Arrow pointing to red tomatoes → Fruit
4. Arrow pointing to green stem → Stem
5. Arrow pointing to roots → Root
So fill in:
- First box (top): Flower
- Second box: Leaf
- Third box (right): Fruit
- Fourth box (right): Stem
- Fifth box (bottom): Root
---
11. To grow healthily plants need air, water, nutrients and ________________.
✔ Answer: sunlight
🔹 *Explanation:* Sunlight is essential for photosynthesis, the process by which plants make their own food.
---
12. ________ have a fixed shape but (13)________ take the shape of the container.
✔ Answer:
- 12. Solids
- 13. Liquids
🔹 *Explanation:* Solids maintain their shape, while liquids flow and take the shape of their container.
---
14. When a liquid is heated it ____________ faster.
✔ Answer: evaporates
🔹 *Explanation:* Heating increases the kinetic energy of liquid molecules, causing them to escape into the air more quickly as vapor.
---
15. Water freezes at __________ degrees Celsius.
✔ Answer: 0
🔹 *Explanation:* At standard atmospheric pressure, water freezes at 0°C (32°F).
---
16. Salt ____________ in water.
✔ Answer: dissolves
🔹 *Explanation:* Salt dissolves in water because water molecules surround salt ions, breaking them apart and dispersing them.
---
17. Stone is ____________ in water.
✔ Answer: insoluble
🔹 *Explanation:* Stones (like rocks or pebbles) do not dissolve in water — they remain solid and sink.
---
18. ____________ is the best way to separate mixed buttons and paperclips.
✔ Answer: Using a magnet
🔹 *Explanation:* Paperclips are made of metal (usually steel), which is magnetic. Buttons are typically not magnetic. So a magnet can attract paperclips, leaving buttons behind.
---
19. A ____________ is ideal to separate coffee from water.
✔ Answer: filter
🔹 *Explanation:* A filter (like in a coffee maker) allows water to pass through while holding back coffee grounds.
---
20. A ____________ can be used to separate pins from buttons.
✔ Answer: magnet
🔹 *Explanation:* Pins are usually made of metal and are magnetic, while buttons are not. So a magnet will pick up the pins.
---
✔ Final Answers Summary:
1. backbones
2. birds
3. reptile
4. monotreme
5. fish
6–10:
- Top: Flower
- Left middle: Leaf
- Right middle: Fruit
- Right lower: Stem
- Bottom: 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 worksheet for 4th grade science.
