Have you ever wondered why some objects float in water while others sink? Or why do you feel lighter when you swim? These are all about water pressure and buoyancy. These are two important concepts in science. This test consists of everyday science MCQs made to explore these exciting topics in a simple and fun way.
Through this test, you will answer multiple-choice questions that explain how water pushes on objects, why boats float and how pressure changes underwater.
Everyday Science MCQs: Water Pressure and Buoyancy
Why does wood float on water?
- Wood is lighter than water.
- Wood pushes water down.
- Water pulls wood up.
- Wood is heavier than water.
Right Answer: (A) Wood is lighter than water.
Why does a piece of iron sink in water?
- It is heavier than water.
- Water cannot hold it up.
- Iron breaks water molecules.
- Iron absorbs water.
Right Answer: (A) It is heavier than water.
What makes an object float or sink in water?
- The shape of the object.
- The color of the object.
- The weight of the object compared to the weight of the water it moves.
- How fast the object is dropped in water.
Right Answer: (C) The weight of the object compared to the weight of the water it moves.
The force that makes things float is called ________.
- Gravity
- Pressure
- Buoyancy
- Friction
Right Answer: (C) Buoyancy
Why do ships made of iron float in water?
- They are filled with air, which makes them lighter than water.
- The water pushes the ship up.
- The ship changes its weight in water.
- Iron becomes lighter in water.
Right Answer: (A) They are filled with air, which makes them lighter than water.
What happens if water fills a ship through a hole?
- The ship becomes heavier and sinks.
- The ship floats higher.
- The ship moves faster.
- The ship stays the same.
Right Answer: (A) The ship becomes heavier and sinks.
How can you find the volume of an irregular object like a rock?
- By measuring its sides.
- By putting it in water and measuring how much water it moves.
- By breaking it into smaller pieces.
- By weighing it.
Right Answer: (B) By putting it in water and measuring how much water it moves.
Why do objects with a lower density than water float?
- They are bigger than water.
- Water pushes them up.
- They are lighter than the water they move.
- Water doesn’t touch them.
Right Answer: (C) They are lighter than the water they move.
What is density?
- The size of an object.
- How heavy or light something is compared to its size.
- The weight of water.
- How fast an object sinks.
Right Answer: (B) How heavy or light something is compared to its size.
What happens if an object is heavier than the water it moves?
- It floats.
- It sinks.
- It disappears.
- It stays on top of the water.