8.6 8.6 Matter and energy.

What is the chemical symbol for Sodium?

• Na

• S

• N

• So

Tags

TEKS.SCI.7.6B

Which of the following is a chemical change?

• Melting ice

• Burning wood

• Tearing paper

• Dissolving sugar in water

Tags

TEKS.SCI.7.6C

Identify the element with atomic number 6 on the periodic table.

• Oxygen

• Carbon

• Nitrogen

• Hydrogen

Tags

TEKS.SCI.6.6C

Which of the following best describes the conservation of mass in a chemical reaction?

• Mass is lost during the reaction.

• Mass is gained during the reaction.

• Mass remains constant during the reaction.

• Mass is irrelevant in chemical reactions.

Tags

TEKS.SCI.8.6E

• 1

• 2

• 3

• 4

Tags

TEKS.SCI.7.6B

Which of the following is a metalloid?

• Silicon

• Iron

• Gold

• Helium

Tags

TEKS.SCI.6.6C

Explain why photosynthesis is considered a chemical change.

• It involves a change in state.

• It involves the rearrangement of atoms to form new substances.

• It involves a change in temperature.

• It involves a change in color.

Tags

TEKS.SCI.7.6C

Which of the following equations represents the conservation of mass in photosynthesis?

Tags

TEKS.SCI.8.6E

Predict the outcome if a metal reacts with a nonmetal.

• Formation of a covalent compound

• Formation of an ionic compound

• No reaction occurs

• Formation of a metallic compound

Tags

TEKS.SCI.6.6C

• Yes, because the number of each type of atom is the same on both sides.

• No, because there are more molecules on the right side.

• Yes, because the total number of molecules is the same.

• No, because the equation is not balanced.

Tags

TEKS.SCI.8.6E