Matter: Properties and Change Test

1.

1 point

Which of the following is a physical property of an element?

color

ability to rust

flammability

ability to tarnish

2.

1 point

Which of the following is an example of a chemical change

breaking glass

mixing milk and chocolate syrup

melting ice

burning wood

3.

1 point

Which of the following is NOT true of atoms?

They make up elements.

They are extremely small.

They combine to form compounds.

They are composed of molecules.

4.

1 point

A _____ is a group of atoms that are joined together and act as a single unit.

blob

cloud

mass

molecule

5.

1 point

A pure substance that cannot be broken down into any other substance by chemical means is called a(n)________.

atom

proton

element

compound

6.

1 point

During a ________ change, the form of a substance is altered, but not its identity.

chemical

emotional

physical

big

7.

1 point

The study of matter and how matter changes is _________.

chemistry

physics

biology

psychology

8.

1 point

A substance made of two or more elements chemically combined is a(n)

element

mixture

compound

atom

9.

1 point

A _____ consists of two or more substances that are in the same place or container but not chemically combined.

mixture

recipe

combined

mess

10.

1 point

You can see the different parts in a _____ mixture.

perfect

standard

heterogeneous

homogeneous

11.

1 point

The substances in a ______ mixture are so evenly mixed that you can't see the different parts.

complete

heterogeneous

complex

homogeneous

12.

1 point

Which of the following methods cannot be used to separate a mixture?

Use a magnet.

Filtration

Distillation

a fence

13.

1 point

The basic part of an element is called a(n)

bit

particle

molecule

atom

14.

1 point

A new substance being produced is evidence of a ______ change.

chemical

complete

radical

physical

15.

1 point

Freezing water is an example of a(n) _____ reaction.

endothermic

isothermic

exothermic

hypothermic

16.

1 point

Which of the following is NOT an example of a physical property?

ability to rust

texture

hardness

physical state

17.

1 point

How many atoms of hydrogen are in a water molecule? (chemical formula H₂O)

3

2

1

4

18.

1 point

An example of an exothermic reaction is

a burning candle

melting ice

chopping vegetables

19.

1 point

The Law of Conservation of Mass states that "During a chemical reaction, matter cannot be _____ or _____."

created destroyed

heated cooled

measured weighed

combined separated

20.

1 point

When two solutions are combined, which evidence would best indicate a chemical reaction has occurred?

A precipitate forms.

Temperature remains constant.

Density decreases.

Volume increases.

21.

1 point

Which classification best fits the chemical Al2O3?

element

compound

molecule

mixture

22.

1 point

How can a scientist change a solid substance into a liquid?

increase the temperature

decrease the chemical reactivity

decrease the density

increase the specific heat

23.

1 point

Which is true when vinegar and baking soda are combined and release a gaseous substance?

The gas has a greater mass than the reactants.

The resulting mixture and the gas have the same mass as the reactants.

The resulting mixture has a greater mass than the reactants.

The resulting mixture and the gas have the same mass.

24.

1 point

Reactant X, with a mass of 15 grams, is mixed with reactant Y, with a mass of 10 grams. What is the mass of the product XY if the reaction occurs in a sealed container?

5 grams

1.5 grams

25 grams

150 grams

25.

1 point

Which indicates a physical change?

formation of a precipitate

formation of a new substance

change in state

release of heat

26.

1 point

In the formula for table salt, NaCl, what is the ratio of sodium to chlorine?

It is a two to one ratio.

It is a one to two ratio.

It is a one to one ratio.

It is a two to three ratio.

27.

1 point

During an experiment, Laura sprinkles baking soda into a beaker of vinegar. It bubbles for about 7 seconds and then stops. Laura calculates that she should have 20 grams of product, but after three trials, the mass of the products is less than 20 grams. Which is the most likely cause of the decrease in mass?

Vinegar evaporates quickly, and some of it evaporated before Laura took her measurements.

Some of the baking soda spilled before it reached the beaker of vinegar.

The remaining mass is gas that is lost to the air during the reaction.

The vinegar dissolved the baking soda; therefore, what Laura measures in the end is correct.

28.

1 point

Which most likely indicates a gas is formed during a chemical reaction?

increase in mass

bubbling

formation of a precipitate

color change