Advance Unit 3 Review

Why are these changes classified as chemical changes?

• A. New substances formed

• B. Materials take different shapes

• C. Temperature affects the objects

• D. Some energy is absorbed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When baking soda reacts with vinegar, bubbles form and the container feels cold. This is an example of:

• A. Exothermic reaction - energy is released.

• B. Endothermic reaction - energy is absorbed from the surroundings.

• C. Neither endothermic nor exothermic - no energy transfer occurs.

• D. The coldness is due to the vinegar, not the reaction itself.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-1

The formation of an ionic bond involves the

• transfer of electrons.

• sharing of neutrons.

• transfer of neutrons.

• sharing of protons.

The formation of a covalent bond involves the

• transfer of electrons.

• sharing of electrons.

• transfer of neutrons.

• sharing of protons.

Tags

NGSS.HS-PS1-1

Which type of matter can be separated by physical means?

• atom

• element

• compound

• mixture

The chart below lists samples of three materials. Classify each sample in the chart as an element, a compound, or a mixture by selecting the correct classification from the drop down menu.

• Element

• Noble Gas

• Mixture

• hydrogen chemically combined with oxygen

• compound

• Salt dissolved in water

Tags

NGSS.MS-PS1-2

In this equation, the total mass of the reactants is

• greater than the total mass of the products

• equal to the total mass of the products

• equal to the mass of AgCl

• less than the mass of AgCl

Tags

NGSS.MS-PS1-5

The diagram below represents two atoms in a molecule of oxygen that combine chemically with one atom of carbon to form a carbon dioxide molecule. Carbon dioxide is an example of:

• a mixture

• an element

• a solution

• a compound

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Which property of water allows it to dissolve many different substances?

• It is a polar molecule.

• It contains hydrogen atoms.

• It has a high melting point.

• It has a low density.