Density

Q.

Take a small cotton ball and place it in a tumbler/ bowl filled with water. Observe it for at least $10$minutes. Will it float or sink in water and why?

Q. Why cannot a person sink in the dead sea?

1. Excessive salt content decreases the density of water
2. The density of a person decreases in the water of the dead sea.
3. Excessive salt content increase the density of water
4. The density of a person increases in the water of the dead sea.

Q.

What will happen when a football is thrown into a swimming pool?

1. It will float

2. It will burst

3. It will fly away

4. It will sink

Q. A wooden ball floats on water. Its density is that of water

1. lesser than
2. greater than
3. equal to

Q. Why cannot a person sink in the dead sea?

1. Excessive salt content increase the density of water
2. The density of a person increases in the water of the dead sea.
3. Excessive salt content decreases the density of water
4. The density of a person decreases in the water of the dead sea.

Q.

If salt is dissolved in water, state its effect on :

Density of water

Q.

If dropped in water, this object will:

1. Sink

2. Float

3. Freeze

4. Burn

Q.

Pick the objects that float on water.

1. 

2. 

3. 

4. 

Q.

The empty wooden bowl will float on the surface of water.

1. True
2. False

Q.

If the inverted bowl is placed on water in a tank, it will sink.

1. True

2. False

Q.

Objects made of plastic usually ____ when dropped in water.

1. float

2. freeze

3. burn

4. sink

Q. Density of water in dead sea is _______ the density of Arabian sea.

1. less than
2. more than
3. equal to
4. not comparable to

Q.

Most plastic objects ___ on/in water.

Q.

Objects made of metal usually ____ when dropped in water.

1. sink

2. float

3. burn

4. freeze

Q. Roger will sink, if he jumps into the Dead sea.

1. True
2. False

Q.

Which of the following will float and sink in water?

Q.

When the object given below is dropped in water, it will ______.

1. condense
2. evaporate
3. sink
4. float

Q. Which factor is responsible for the increase in the density of dead sea?

1. Less salts
2. More water
3. Less water
4. More salts

Q. Which ball is denser than water?

1. 
2. 
3. 

Q.

Objects made of plastic usually ____ when dropped in water.

1. sink

2. float

3. burn

4. freeze

Q.

Which of the following will float and sink in water?

Q.

Why do ice float on water?

Q. Mixing salt in water increases the density of water

1. False
2. True