What is the formula for density?

Density (d) = Mass of the substance (M) ÷ Volume of the substance (V)

True or False: The density of a substance changes with its shape or size.

False. The density of a substance does not change with its shape or size.

Riddle: I am a property that tells how much mass is packed in a given volume. What am I?

Density

Fill-in-the-blanks: The SI unit of density is ______.

Kg/m³

Which of the following materials has a higher density than wood? A) Iron B) Cork C) Water D) Air

A) Iron

What happens to the density of a substance when it is heated?

The density decreases when it is heated because its volume increases.

Fill-in-the-blanks: The unit of relative density is ______.

Dimensionless

True or False: A piece of ice sinks in water because its density is less than that of water.

False. Ice floats on water because its density (0.917 g/cm³) is less than water's density (1.0 g/cm³).

Riddle: I can be measured using a beam balance, and my weight is equal to the buoyant force when floating. What am I?

Weight of the object

What is the relationship between mass and volume in determining density?

Density increases when mass increases or volume decreases, and vice versa.

Fill-in-the-blanks: To find the volume of a cube, we use the formula ______.

Volume of cube = (one side)³

Which of the following statements about buoyant force is true? A) It always pulls objects down. B) It pushes objects upwards. C) It has no effect on floating. D) It is equal to the mass of the object.

B) It pushes objects upwards.

True or False: The density of water is maximum at 0°C.

False. The density of water is maximum at 4°C.

What method is used to measure the volume of an irregular solid?

Displacement method

Fill-in-the-blanks: The law of floatation states that the weight of a floating body equals the weight of the ______ displaced by the submerged part of the body.

Liquid

Which of the following is the correct density for cork? A) 0.25 g/cm³ B) 1.0 g/cm³ C) 7.8 g/cm³ D) 0.917 g/cm³

A) 0.25 g/cm³

What is the density of a liquid if 200 g of liquid occupies 200 cm³?

1 g/cm³

Fill-in-the-blanks: A density bottle is used to measure the ______ of a liquid.

Density

Riddle: I can make ships float even though I'm denser than water. What am I?

A hollow ship

True or False: Gases generally have a higher density than liquids.

False. Gases have a lower density than liquids.

What is the relative density of a substance with a density of 2 g/cm³ compared to water?

2

Fill-in-the-blanks: The buoyant force depends on the volume of the body in the liquid and the ______ of the liquid.

Density

Which of the following substances has a density greater than water? A) Ice B) Cork C) Iron D) Oil

C) Iron

What happens to the density of a gas when the temperature decreases?

The density increases.

Fill-in-the-blanks: According to the principle of floating, the weight of the liquid displaced by the submerged part equals the ______ of the object.

Total weight

Which of the following correctly describes the relationship between density and floating? A) Higher density floats. B) Lower density sinks. C) Higher density sinks. D) Density does not affect floating.

C) Higher density sinks.

What is the mass of 50 cm³ of a liquid that has a density of 1 g/cm³?

50 g

Riddle: I float on water yet am made of ice, only a small part is submerged. What am I?

Ice

True or False: Relative density has units.

False. Relative density is a dimensionless quantity.

What is the formula for density?

Density (d) = Mass (M) ÷ Volume (V)

True or False: The density of a substance changes with its shape or size.

False. The density of a substance does not change with its shape or size.

Riddle: I can help you measure how heavy something is for a given space, written as mass per volume. What am I?

Density

Fill in the blanks: The unit of density in the SI system is ______.

Kg/m³