Mod J Unit 1 Lesson 1 : Properties of Matter

Which statement describes an example of a chemical property of a metal statue?

• It is a solid.

• It is shiny.

• It is silver.

• It can tarnish.

Which of these is an example of physical property?

• the fact that iron rusts

• the texture of a piece of chocolate

• the effect of acid rain on automobiles

• the fact that gasoline in a car combusts

Which of these is a chemical property of a sheet of paper?

• The paper can be burned.

• The paper can be crumbled.

• The paper does not attract a magnet.

• The paper does not conduct electricity.

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NGSS.MS-PS1-2

Hydrogen gas (H₂) can be found in trace amounts in Earth's atmosphere. Which of these statements describes a physical property of hydrogen?

• Hydrogen is found in acids.

• Hydrogen gas is highly flammable.

• Hydrogen reacts with oxygen to form water.

• Hydrogen gas is less dense than oxygen gas.

Which properties describe all matter?

• being able to be seen in nature

• having energy and temperature

• being able to be measured

• having mass and taking up space

The table lists densities of common materials at 20^oC.

If a scientists has 10 grames of each material, which material has the greatest volume?

• milk

• water

• mercury

• gasoline

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NGSS.MS-PS1-2

Which statement best describes physical properties?

Physical properties ...

• behave identically for all matter under the same conditions

• can be observed without changing the identity of a substance

• are observed by seeing how a substance reacts with other substances

• cause atoms and molecules to change structure when substanes are mixed

The mass of a lenght of wire is 45g. When the wire is placed in water, it displaces 5ml of water. What is the density of the metal?

• 0.1 g/cm³

• 9 g/cm³

• 40 g/cm³

• 225 g/cm³

Answer explanation

Density is equal to mass divided by volume.

D =m÷ v

D= 45 g ÷ 5 mL

D= 9 g/ml (or 9 g/cm³)

The photo shows mercury. Which of the following are physical properties of mercury that you can observe in the photo? Select two (2) that apply.

• Its density os similar to the density of water.

• It is in the liquid state.

• It is shiny and gray.

• It is not attracted to magnets

• It is able to react with oxygen.

Answer explanation

You can see that the mercury is a shiny, gray liquid without changing the mercury into another substance. Just because mercury is a liquid, you cannot assume that its density is similar to water.

Old thermometers contained very small amounts of mercury. The mercury in the photo has a melting point of −38.8 °C. What can you conclude about the melting point of the mercury in old thermometers?

• Its melting point can only be determined when the mercury is burned.

• Its melting point changes as the mercury’s temperature changes.

• ts melting point equals −38.8 °C because it is mercury.

• Its melting point is less than −38.8 °C because its volume is smaller.

Answer explanation

The melting point is a characteristic property, so the melting point of mercury is −38.8 °C for very small amounts or very large amounts of mercury.

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NGSS.MS-PS1-2