EOT REVIEW LESSON - GRADE 8

Multiple Choice

Which of the following terms identifies the change from a liquid to gas?

• Vaporization

• Condensation

• Deposition

• Sublimation

Multiple Choice

When the temperature of matter increases the particles...

• speed up and move closer

• speed up and move farther apart

• slow down and move closer together

• slow down and move farther apart

Multiple Choice

Phase change from a solid to a gas.

• sublimation

• deposition

• condensation

• evaporation

Multiple Choice

Which state of matter has molecules that slide past each other but stay close together? They do not form a regular pattern.

• solid

• liquid

• gas

Multiple Choice

What happens when a liquid freezes?

• The particle lose kinetic energy and turn into a gas

• The particles lose kinetic energy and turn into a solid

• The particles gain kinetic energy and turn into a solid

• The liquid turns cold

Multiple Choice

You put a cold glass of water outside on a hot, sunny day. After an hour, "sweat" begins to form on the outside of the glass. Where did this liquid come from?

• the liquid inside the glass moved to the outside

• someone sprayed the glass with a water bottle

• the water vapor in the air condensed into a liquid

• it rained

Multiple Choice

What is a physical property?

• How two chemicals react with one another when combined

• A property that we can measure or observe with our 5 senses or other tools

• When two chemicals react with one another to form a new substance

• When a change occurs but it does not result in the formation of a new substance

Multiple Choice

How does heat transfer when you hold an ice cube in your hand?

• from the cold ice cube to your warm hand

• the cold ice cube makes your hand cold

• from your warm hand to the cold ice cube

• very carefully

Multiple Choice

The temperature of a substance increases as___.

• the substance expands

• the average kinetic energy of its particles increases

• the substance's volume increases

• the substance's mass increases

Multiple Choice

If the particles of two substances have the same average kinetic energy, then___.

• the specific heats of the substances are identical 

• the particles will not react chemically

• the substances have equal thermal energies

• the substances have equal temperatures

Multiple Choice

What does the average kinetic energy of an object's particles tell you?

• how hot the object is

• how cold the object is

• the temperature of the object 

• how fast the particles are moving

Multiple Choice

Both elements and compounds are pure substances.

• Agree

• Disagree

Multiple Choice

Can be broken down into a simpler substance

• Elements

• Compounds

• Both

Multiple Choice

Composed of at least two different elements

• Elements

• Compounds

• Both

Multiple Choice

Cannot be broken down into a simpler substance

• Elements

• Compounds

• Both

Multiple Choice

Is this a physical or chemical change?

• Physical

• Chemical

Multiple Choice

In this example, what is the evidence a chemical change has occurred?

• volume is increased

• no energy is released

• gas is being released

• a precipitate has formed

Multiple Choice

Bubbles form when water boils. Is this evidence of chemical change?

• Yes, because water is changing.

• Yes, because the water is reacting.

• No, because the vapor is still water.

• No, because water doesn't react with anything.

Multiple Choice

Which type of change is occurring in the picture?

• Chemical

• Physical

Multiple Choice

Isotopes are

• atoms of the different element with same atomic number but different mass numb

• atoms of the same element with same atomic number and same mass number

• atoms of the same element with same atomic number but different mass number

• atoms of the same element with different atomic number but different mass number

Multiple Choice

the mass of ---------------is negligble

• neutron

• proton

• electron

• nuleus

Multiple Choice

Group 1 elements are called

• alkali metals

• alkaline earth metals

• transition elements

• Noble gas

Multiple Choice

Group 2 elements are called

• alkali metals

• alkaline earth metals

• transition elements

• noble gas elements

Multiple Choice

Transition elements are

• group 1 elements

• group 2 elements

• group 3-12 elements

• group 18 elements

Multiple Choice

Noble gas elements are

• group 18

• group1

• group 2

• group 3-12

Open Ended

For the following two chemical reactions, determine the unknown mass of one reactant from the given mass of the other reactant and the product?

H2+O2→H2O2; mass O2=32 g and mass of H2O2=34 g

Open Ended

For the following two chemical reactions, determine the unknown mass of one reactant from the given mass of the other reactant and the product?

Ba+2I2→BaI2; mass Ba=137 g and mass of BaI2=391 g

Multiple Choice

Element used for treating bipolar disorder

• Magnesium

• lithium

• calcium

• Aluminum

Multiple Choice

Magnesium is used for making cars and air craft because it is

• very heavy and soft

• very light and strong

• very heavy and brittle

• very heavy and strong

Multiple Choice

---------------------- is the main ingredient in steel

• lead

• cobalt

• Iron

• phosphorous

Multiple Choice

A glowing lightbulb filament is made from

• iron

• copper

• tungsten

• cobalt

Open Ended

why tungsten is used for making filament of bulb