IAPS semester 1 review

If you place a solid in water you can determine:

• the density of the solid relative to water

• the toxicity

• the flammability of the solid

• the reactivity of the solid

The center of an atom where its neutrons and protons are is called the _____________.

• nucleus

• electron cloud

• center

Which one of the following tests could help you narrow down the identity of the substance?

• Placing the substance in water.

• Holding a magnet near the substance.

• Observing that the substance is a solid.

• Carefully smelling the substance.

Matt has a blue balloon and a red balloon that are the same volume but filled with different gases. The red balloon floats in air, but the blue balloon does not float in air. How does the density of the gas in the balloons compare to the density of the surrounding air?

• A. The gases in both balloons are less dense than air.

• The gas in the red balloon is less dense than the air.

• The gas in the blue balloon is less dense than the air

• The gases in both balloons have the same density as the

Chad adds several drops of oil to a sample of water.

Which of the following does Chad make?

• mixture

• solution

• compound

• pure substance

Which statement is an example of a prediction?

• metal is shiny and brittle

• the sugar had a mass of 15g.

• The type of sugar will affect the respiration rate of yeast.

• The amount of oxygen produced by the plant decreased as the amount of light decreased.

Jane measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 mL. What is the density of the piece of metal?

• 20g/cm3

• 10g/ cm3

• 5g/cm3

• .2g/cm3

A piece having a length of 4.0 cm was cut from a much longer, uniform rod. The piece has a volume of 3.0 cm³ and a mass of 24 g. Suppose another piece from the same rod is five times as long. What is its mass in grams?

• 32

• 40

• 96

• 120

Elizabeth wants to know the volume of a glass figurine that is irregularly shaped. She learns that the density of the glass used to make the figurine is 3.1 grams/cubic centimeter (g/cm³). She measures the mass to be 403 g. The equation for density is d = m/V. What is the volume of the glass figurine?

• 0 cm³

• 0.0077 cm³

• 130 cm³

• 1,250

  cm3

Erin makes a sugar solution by adding a 1 teaspoon of sugar at a time to 100 mL of water until no more sugar dissolves. Then she makes a salt solution by adding 1 teaspoon of salt at a time to 100 mL of water until no more salt dissolves. She observes that she adds fewer teaspoons of salt before it stops dissolving. What does she conclude about the solubility of sugar and salt in water?

• They have no solubility.

• They have the same solubility.

• Salt

  has a higher solubility than sugar

• Sugar has a higher solubility than salt.