Combined Science EOY Revision 2023

What happens to the molecules of a solid when it is heated?

• Slow down
• Speed up
• Don't change speed
• Shrink

The liquid in a thermometer ______________ as the temperature increases.

• expands
• disappears
• freezes
• explodes

Many objects, such as train tracks and road joints, are specifically designed to allow extra space for ...

• thermal energy
• specific heat
• thermal expansion
• conductors

What happens to air particles when they are heated?

• Particles move faster and expand
• Particles move faster and become closer together.
• Particles move slower and the air expands
• Particles move faster become further apart

Thermal expansion occurs when particles of matter move farther apart as temperature increase.

• True

• False

Ionic bonds are formed when electrons get

• Shared between two atoms

• Removed from both atoms

• Transferred from one atom to another

• Added to both atoms

Ionic bonds typically form between

• A metal and a nonmetal

• Two nonmetals

• Two metals

• A metalloid and a metal

What is the correct formula for Sodium Chloride?

• SCl

• NaCl

• SC

• NaCl₂

Cations _______ electrons, becoming _______ charged.

• Gain; positively (+)

• Gain; negatively (-)

• Lose; positively (+)

• Lose; negatively (-)

What is a double bond?

• a bond between two atoms

• one pair of electrons shared between two atoms

• two pairs of electrons shared between two atoms

• three pairs of electrons shared between two atoms