Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---

made of two different elements.

The law of conservation of mass states that....

Matter can neither be made or destroyed

Which of the following describes a precipitate?

a solid forms when one liquid is poured into another

a liquid forms when a block of metal is heated

a gas forms when a solid is placed in a liquid

bubbles form when an acid is poured on a rock

Which of the following is an example that includes evidence of a chemical reaction?

Sugar that is burned gives off an odor and turns brown and then black.

A sample of zinc is placed in water and it settles to the bottom

A solid block of ice is heated and it completely melts into a liquid.

A tomato is placed into a blender and chopped up into smaller pieces.

What is a chemical equation?

A written description of a chemical reaction.

Describes the number of elements in a compound.

One or two letters that represent the elements on the periodic table.

The number to the lower right of an element that shows the number of atoms bonded.

What is surface tension?

The strength of the cohesion of all the water molecules combined

Water's ability to stick to itself

Water's ability to stick to other substances

Water's ability to stick to itself

The strength of the cohesion of all the water molecules combined

As water freezes, it expands and its density decreases.

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together

The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet

The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

Why does ice stay at the top of oceans instead of sinking to the bottom?

Ice is less dense than liquid water.

Ice is colder than liquid water.

Ice is more dense than liquid water.

Ice is warmer than liquid water.

A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?

The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.

The mass of the balloon increases because the size of the balloon has increased.

The mass of the balloon increases because the temperature of the balloon has increased.

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

500 grams, because the cheese does not gain or lose mass just because it was melted

499 grams, because some of the cheese evaporates as it melts

502 grams, because the cheese absorbs heat as it melts

What methods can you use to measure the pH of a solution?

Using acid base-indicators or pH meters

Measuring density or electrical conductivity

Chemistry Review Game

Authored by Christopher Herrera

Chemistry

8th Grade

NGSS covered

Used 37+ times

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60 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many elements are in C₆H₁₂O₆?

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many Sodium (Na) are in 6NaCl?

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many Aluminum are in Al₂O₃?

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

Yes!

No!

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

yes

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is the following equation balanced?
Al + O2 ---> 2Al2O3

Yes

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Identify the reactants in the following equation.
3HFe2O →H+2FEH+O

H+2FEH+O

3HFe2O

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

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