Science Quiz

According to the kinetic molecular theory, particles of matter are always in __________, and their motion increases as the __________ increases.

• motion, temperature

• rest, temperature

• motion, pressure

• motion, volume

• rest, pressure

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens at the molecular level when water changes from a solid to a liquid?

• Molecules move closer together

• Molecules move further apart

• Molecules stop moving

• Molecules form a rigid structure

Tags

NGSS.MS-PS1-4

What is an electrolyte?

• A substance that does not conduct electricity in solution.

• A substance that conducts electricity in solution.

• A substance that evaporates quickly.

• A substance that is insoluble in water.

What is the effect of the "sea of electrons" on the conductivity of metals?

• It decreases conductivity.

• It increases conductivity.

• It has no effect on conductivity.

• It makes metals insulators.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which type of solution can dissolve more solute at a given temperature?

• Unsaturated solution

• Saturated solution

• Supersaturated solution

• All solutions can dissolve more solute.

What property of metals is explained by the "sea of electrons" model?

• Brittleness

• Transparency

• Malleability

• Insulation

Why is ice less dense than water?

• Due to ionic bonding.

• Due to covalent bonding.

• Due to hydrogen bonding.

• Due to metallic bonding.

Tags

NGSS.MS-PS1-1

What is the triple point?

• The point where two states of matter coexist.

• The temperature and pressure at which all three states of matter coexist in equilibrium.

• The point where matter changes from solid to liquid.

• The temperature at which water boils.

Why do ionic compounds generally have higher melting points than molecular compounds?

• Because of weaker covalent bonds.

• Because of stronger ionic bonds.

• Because of weaker metallic bonds.

• Because of stronger hydrogen bonds.

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4

What is a solution called where no more solute can dissolve under current conditions?

• Unsaturated solution.

• Dilute solution.

• Saturated solution.

• Concentrated solution.