Matter Test GIO

Taylor is learning about pure substance and mixture. In her notes, she included a table with the properties of pure substances and mixtures.Which option BEST describes the error in her table?

• Elements and compounds are considered mixtures.

• Mixtures contain two or more substances.

• Pure substances can be separated using physical means.

• Mixtures are substances that are not chemically combined.

Select the element from the choices below.

• HCl

• O

• MgBr

• NaCl

There are 3 unknown substances A, B, and C that need to be classified as element, mixture or compound.. Substance A can be broken down by a physical change. Substance B cannot be broken down by a chemical or physical change. Substance C can only be broken down by a chemical change. How would you classify these substances based on the given information?

• Substance A is an element, substance B is a compound, and substance C is a mixture.

• Substance A is a compound, substance B is an element, and substance C is a mixture.

• Substance A is a compound, substance B is a mixture, and substance C is an element.

• Substance A is a mixture, substance B is an element, and substance C is a compound.

Which statement best describes what is happening at portion C?

• The energy is increasing, but the temperature stays the same.

• Both the energy and temperature remain the same.

• The energy is increasing and the temperature is also increasing.

Tags

NGSS.MS-PS1-4

What phase of matter does picture A represent?

• Gas

• Solid

• Liquid

• Plasma

Which phase change occurs when particles are slowing down and moving closer together?

• Condensation

• Melting

• Evaporation

• Boiling

Tags

NGSS.MS-PS1-4

Which of the following is a physical property of potassium?

• Freezing point

• Reactivity with an acid

• Combustibility

• Flamability

A liquid has a mass of 25 grams (g) and a volume of 10 milliliters (mL). Calculate the density of the liquid.

• 0.4 g/mL

• 4.0 g/mL

• 2.5 g/mL

• 250 g/mL

A student observes a raw egg float in concentrated salt water but sink in tap water. What can the student conclude from this observation?

• A raw egg has equal density as salt water.

• A raw egg, salt water, and tap water have equal densities.

• A raw egg is less dense than tap water but more dense than salt water.

• A raw egg is less dense than salt water but more dense than tap water.

Which of the following will NOT happen when a liquid undergoes a physical change?

• The molecules will rearrange to form new chemical bonds.

• The kinetic energy of the molecules increases.

• The motion of the molecules will decrease.

• The molecules become more closely packed.

Tags

NGSS.MS-PS1-4