When vaporization occurs _________.

d) a liquid gains energy and becomes a gas

a) a gas gains energy and becomes a liquid

b) a gas loses energy and becomes a liquid

c) a liquid loses energy and becomes a gas

How does thermal energy move? Thermal energy always flows from ____.

a) a warmer substance to a cooler substance.

b) a cooler substance to a warmer substance.

c) one substance to another substance having the same temperature.

When melted steel becomes a solid, ____________

energy is released which is an exothermic process.

energy is absorbed which is an exothermic process.

energy is absorbed which is an endothermic process.

energy is released which is an endothermic process.

What are amorphous solids?

Solids where the particles are not arranged and they do not have a specific melting point. They just get softer and softer.

Solids where the particles are highly ordered. They have a specific melting point. They get harder.

A state of matter similar to gas, all atoms have lost some electrons

The amount of force on a specific object

A liquid with a definite volume

Which container would have the greatest average motion of the particles and why?

The one with the highest temperature, which means it has the most kinetic energy and particles move rapidly in all directions

The one with the lowest temperature, which means it has the least kinetic energy and particles move rapidly in all directions

Which container would have the greatest amount of thermal energy?

The one with most mass and highest temperature.

The one with least mass and lowest temperature.

Which container would have the least energy needed to raise temperature

The one with the smallest volume of water

The one with the greatest volume of water

When ice is added to a frying pan it melts and forms water. The water eventually starts to boil, forming water vapor. When all of the water has boiled off the frying pan, the pan will contain nothing but air. However, when a block of dry ice (carbon dioxide) is added to a frying pan something completely different happens. The block of dry ice disappears completely and no liquid is formed. Explain why the water remains when the ice melts, but the block of dry ice completely disappears.

Water remains because it melts into a liquid, while dry ice sublimates directly into gas.

Water and dry ice both melt into liquid, but dry ice evaporates faster.

Water turns into gas immediately, while dry ice remains as a solid.

Both water and dry ice turn into gas, but water leaves a residue.

The air pressure in a car’s tires is lower before the car has been driven for an hour because:

since the tires are cold, air molecules move slower, lowering pressure.

since the tires are cold, air molecules move faster, lowering pressure.

since the tires are warm, air molecules move slower, lowering pressure.

since the tires are warm, air molecules move faster, lowering pressure.

What causes the zip-lock bag to explode when dry ice and water are added?

The dry ice absorbs heat, sublimates into gas, and increases pressure inside the bag.

The water freezes the dry ice, causing it to expand rapidly.

The bag reacts chemically with the dry ice, creating an explosion.

The water evaporates quickly, forcing the bag to burst.

A small amount of water and a piece of dry ice are added to the zip lock bag. After several minutes the bag explodes. Use the graphic organizer below to show how thermal energy transfer causes the bag to explode. Your explanation should include information about molecular collision and pressure. Describe the process that connects the cause and effect. Why does this happen?

The thermal energy causes the dry ice to sublimate, increasing gas pressure.

The water reacts chemically with the dry ice, creating an explosive gas.

The bag material weakens over time, causing it to burst.

The water evaporates, reducing the volume inside the bag.

What are crystalline solids?

Solids that have a definite melting point and the particles are arranged in a pattern

Crystalline solids are composed of randomly arranged particles.

Crystalline solids are always liquid at room temperature.

Crystalline solids are amorphous materials with no long-range order.

How is plasma formed?

Plasma is formed when atoms of a gas are given large amounts of energy, which causes some of the electrons to leave the atom

Plasma is generated through chemical reactions that cause small amounts of energy.

Plasma is formed by cooling gases. that cause atoms the join the atom

Plasma is created from solid materials which are losing energy.

If I have the same size and shape spoon made out of different materials, which material will heat up the fastest?

The one with the lowest specific heat

The one with the highest specific heat

If I have the same size and shape spoon made out of different materials, which material will heat up the slowest?

The one with the highest specific heat

The one with the lowest specific heat

Science 6 Chemistry Test 2

Authored by Allison Gelbstein

Science

6th Grade

Used 2+ times

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50 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You can cause water to change state by removing or adding

matter

particles

energy

surface tension

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the temperature at which a substance changes from a solid to a liquid?

melting point

boiling point

evaporation point

sublimation point

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When energy is absorbed (taken in) by a substance during a change, it is called

an endothermic change

an exothermic change

freezing

condensation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following changes of state is exothermic?

evaporation

freezing

sublimation

melting

MULTIPLE SELECT QUESTION

30 sec • 1 pt

The element gallium, has a melting point of 30°C. Your normal body temperature is around 37°C. Gallium would melt in your hand because energy

is transferred from gallium to your hand.

is transferred from your hand to gallium.

from your hand causes gallium to boil.

from your hand breaks apart the particles of gallium.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The resistance of a material to flow is called

surface tension

boiling point

viscosity

melting point

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which of the following statements describes evaporation?

Evaporation is a form of vaporization.

Evaporation occurs in a liquid when the temperature is lower than its boiling point.

Evaporation occurs at the surface of a liquid.

all of the above

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Science 6 Chemistry Test 2

You can cause water to change state by removing or adding

What is the temperature at which a substance changes from a solid to a liquid?

When energy is absorbed (taken in) by a substance during a change, it is called

Which of the following changes of state is exothermic?

The element gallium, has a melting point of 30°C. Your normal body temperature is around 37°C. Gallium would melt in your hand because energy

The resistance of a material to flow is called

Which of the following statements describes evaporation?

What is the change of state from a solid directly to a gas called?

Which of the following changes a liquid to a gas?

Which of the following is MOST likely to undergo sublimation?

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