Physical Science Exam Review

Which substance is most likely classified as a colloid?

• soft drink
• oxygen gas
• water
• fog

Atoms of which two elements will form an ionic bond?

• Mg and Cl
• N and O
• Fe and Co
• Rb and Al

Tags

NGSS.HS-PS1-2

Which compound will most likely be formed when lithium (Li) and nitrogen (N) are chemically combined?

• LiN
• Li₃N
• LiN₃
• Li₃N₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which compound results from covalent bonding?

• NH₄Cl
• K₂SO₄
• NaCl
• CO2

Why are beta particles able to penetrate objects better than alpha particles are?

• because beta particles are larger than alpha particles
• because beta particles are smaller than alpha particles
• because beta particles are negatively charged, while alpha particles are neutral
• because beta particles travel in a straight line, while alpha particles travel in waves

This graph represents the cooling curve for a pure substance in a liquid state at t=0 min. Why does temperature remain constant from when t = 2 min to when t = 5 min?

• because the substance absorbs the heat energy as it changes from a liquid to a solid
• because heat energy is released from the substance as it changes from a liquid to a solid
• because heat energy is released from the substance as it changes from a liquid to a gas
• because the substance absorbs heat energy as it changes from a liquid to a gas

Tags

NGSS.MS-PS1-4

This diagram represents a closed series circuit. What would happen if the voltage were doubled?

• The current would quadruple.
• The current would double.
• The current would remain constant.
• The current would be reduced by half.

Tags

NGSS.HS-PS3-5

How would decreasing the diameter of the wires in a circuit influence the resistance and flow of electrons in the circuit?

• It would decrease the resistance, causing fewer electrons to flow through the circuit.
• It would increase the resistance, causing fewer electrons to flow through the circuit.
• It would decrease the resistance allowing more electrons to flow through the circuit.
• It would increase the resistance by allowing more electrons to flow through the circuit.

Tags

NGSS.MS-PS2-3

How could the strength of an electromagnet be increased?

• by reducing the length of the core of the electromagnet
• by using rubber material as the core for the electromagnet
• by decreasing the amount of current in the electromagnet
• by increasing the number of coils in the wires of the electromagnet

Tags

NGSS.HS-PS2-5

How does a step-down transformer alter the amount of voltage from a power line to a building?

• It increases output voltage by increasing the number of wire turns in the secondary coil.
• It decreases output voltage by decreasing the number of turns in the secondary coil.
• It increase output voltage by decreasing the number of wire turns in the secondary coil.
• It decreases output voltage by increasing the number of turns in the secondary coil.