Density

Q.

6. Give five examples each of objects that float and sink in water.

Q.

Comment on the following statements: Sponge though compressible is a solid?

Q.

State the conditions for flotation of bodies.

Q. A mass of the substance per unit volume is called its .

1. density
2. weight
3. area

Q.

What happens when water is added to kerosene?

1. Water forms a layer above

2. Can't say, need more information

3. They both mix well and layers are not seen.

4. Kerosene forms a layer above water.

Q.

How does density of a substance change with temperature.

Q.

Does wood sink in water?

Q.

State the effect of temperature on the density of a substance.

Q.

Among Water, Kerosene, and Oil, which do you think is heavier?

1. Water

2. Oil

3. Can't say

4. Kerosene

Q.

An aluminum can floats on water because the density of aluminum is less than that of water.

1. True
2. False

Q. Which among the following objects will not float on water?

1. A metal key
2. A sheet of paper
3. A leaf
4. A wooden cork

Q. Rohit placed a sponge and a stone in two different bowls filled with water. What would he observe?

1. Stone floats on water.
2. Sponge floats on water.
3. Both floats on water.
4. Both sinks in water.

Q.

Equal masses of different substances have___ volumes.

Q. Among ice, water, kerosene, and petrol which do you think is the heaviest?

1. Ice
2. Petrol
3. Kerosene
4. Water

Q.

Liquids are less dense than solids.

1. True
2. False

Q.

The density of an object is slightly lesser than that of water. Will it float or sink in water?Why?

Q. Arrange the following in the ascending order of their densities: vegetable oil, corn syrup and water.

1. Vegetable oil, Water, Corn syrup
2. Corn syrup, Vegetable oil, Water
3. Water, Corn syrup, Vegetable oil
4. Cannot be determined

Q.

Why do different liquids have different densities?

Q.

Substance with equal mass will always have equal volume.

1. True
2. False

Q.

Equal masses of two substance may have different volume.

1. True
2. False

Q.

Define the term volume

Q.

The cloud floats in the atmosphere because of its low

1. Temperature

2. Pressure

3. Velocity

4. Density

Q. Objects that are more dense than water will ____ in it.

1. dissolve
2. sink
3. float
4. sink then float

Q. A 448 ml of mixture of O2 and O3 measured at STP has mass 0.8 gram. What is the volume of O3 in the mixture at STP?

Q. Why does 1 kg of iron occupies less space compared to 1 kg of sponge?

1. Iron has less density than sponge.
2. lron and sponge have equal densities.
3. Iron has more density than sponge.
4. Weight of iron per unit volume is less than that of sponge.

Q.

Equal volumes of different substances have ___________ masses.

Q.

Why do objects made of wood or plastic float in water?

Q.

Why human being sink in water when he was living while it's body floats on water when it was died

Q.

The space a substance occupies is called its ____.

Q.

Why iron nail sink in water and ship floats in water?