chapter 15 science: elements, compounds, and mixtures

which of the following is an example of a chemical change? A. evaporation in a swamp cooler B. electricity produced by a dry cell C. digestion of hamburger D. rusting of a car body

A. evaporation in a swamp cooler

match the term with the definition.

A. physical property C. chemical property B. physical change D. chemical change

________ is NOT a homogeneous mixture. A. a salad C. vinegar B. Glue D. gelatin

A. a salad

Three examples of physical changes are_________. A. Boling of water, bursting of a balloon, and crumpling a piece of paper B. burning of gasoline, rotting egg, and exploding fireworks C. freezing of water , evaporation of gasoline, and rusting a nail D. sawing of wood, crushing a can, toasting a marshmallow

A. boiling of water, bursting of a balloon, and crumpling a piece of paper

The following are examples of chemical properties except _______________. A. the ability to burn C. the ability to react with oxygen B. the ability to be crushed D. toxicity

B. ability to be crushed

A _______ is NOT a mixture. A. colloid C. suspension B. compound D. solution

B. compound

One of the chemical properties of acids is that they ___. A. taste sour C. crumble B. feel slippery D. corrode metal

D. corrode metal

Cleaning tarnished silver is an example for which of the following. A. chemical change C. physical change B. chemical property D. physical property

A. chemical change

Fog is an example of a _______. A. colloid C. solution B. compound D. substance

A. colloid

What do two or more elements combine to form? A. a compound C. a substance B. an element D. a solution

A. compound

9. all atoms the same

A. element

match each term with the correct definitions below.

A. element D. compound B. mixture E. matter C. substance

When a log burns in a fire,____. A. Physical change has occurred C. mass is lost B mass is gained D. new substances are formed

D. new substance are formed

The shape of an apple is a ________. A. chemical change C. physical change B. chemical property D. Physical property

D. physical property

7. has mass, takes up space

E. matter

Flammability is a -physical- property.

FALSE CHEMICAL

Using oxygen to separate molten copper sulfide into copper and sulfur dioxide is a -physical- change.

FALSE CHEMICAL

When lightning converts oxygen gas, O2,into ozone,O3, it is a -physical- change.

FALSE CHEMICAL

A -physical property- is a characteristic of something that allows it to change something new.

FALSE CHEMICAL PROPERTY

The ability of a match to burn is an example of a -chemical change-

FALSE CHEMICAL PROPERTY

If a mixture scatters light and does not settle upon standing, its a -suspension.-

FALSE COLLOID

smoke is a -compound-

FALSE COLLOID

When a firecracker explodes, mass is -lost.-

FALSE CONSERVATION

A fruit salad is a -homogeneous- mixture.

FALSE HETEROGENEOUS

A suspension is a -homogeneous- mixture.

FALSE HETEROGENEOUS

The freezing of water is a -chemical- change.

FALSE PHYSICAL

Homogeneous mixtures include -colloids, solutions, and suspensions-

FALSE SOLUTIONS

______________ is anything that takes up space and has mass.

matter

River deltas, which form as silt and mud settle, are evidence that river water is a _______________

suspensions

2. plant making food out of the water and carbon dioxide

D. chemical change

8. two or more elements combined

D. compound

Matter is classified as _____________ and mixtures

substances

Matter is neither __________ nor ________________ during a chemical change.

1st lost 2nd gained

When two or more substances are combined so each substance can be separated by physical means, the result is a(n) _________. A. chemical change C. element B. compound D. mixture

B. compound

6. composition variable

B. mixture

1. orange juice being made from fresh oranges

B. physical change

4. leaves changing colors in the fall

B. physical change

magnetism easily separates what mixture? A. sand and glass C. sand and clay B. sand and iron D. sand and aluminum

B. sand and iron

______ is another name for a homogeneous mixture. A. liquid C. substance B. solution D. suspension

B. solution

A characteristic of matter that allows it to change to something new is a _________________. A. physical property C. chemical property B. physical change D. chemical change

C. CHEMICAL PROPERTY

What is chalk considered? A. an element C. a compound B. a colloid D. a solution

C. a compound

All of the following are examples of physical changes except______. A. melting C. burning B. evaporating D.solidifying

C. burning

3. wind and water erosion

C. chemical property

5. the wall was blue

C. chemical property

Density is an example of a ___________. A. chemical property C. physical property B. chemical change D. physical change

C. physical property

All of the following are examples of chemical weathering except___. A. acid rain C. rocks breaking of ice B. cave formations D. pollution

C. rocks breaking because of ice

10. composition definite

C. substance

The law of conservation of mass states that the mass of all substances before a -physical change- equals the mass of all the substances after the change

CHEMICAL CHANGE

what is baking soda considered? A. heterogeneous mixture C. an element B a homogeneous mixture D. compound

D. compound

The scattering of light by colloids is called ____. A. air pollution C. suspension B. conservation D. the Tyndall effect

D. The Tyndall effect

The following are examples of physical properties EXCEPT __________. A. density C. color B. shape D. ability to react with oxygen

D. ability to react with oxygen

Which of the following is an example of a chemical change? A. painting a house C. bending steel B. freezing water D. baking soda in water

D. baking soda In water

Which of the following is an example of a chemical change? A. bending a pop can C. melting wax B evaporation of milk D. burning paper

D. burning paper

The law that states mass is neither gained nor lost in a chemical change is __________________

Law conservation of mass

-Distillation- is a way to separate a mixture using the physical property of boiling point.

TRUE

A description of an object based on what you observe with your senses includes -physical properties-

TRUE

Colloids are -mixtures-

TRUE

One of the chemical properties of acids is that they -corrode metal-

TRUE

The breaking of a glass window is a -physical- change.

TRUE

The color of a substance is a -physical property-

TRUE

substances are either elements or -mixtures-

TRUE

the loss of a beachfront due to erosion of sand by the ocean is an example of -physical weathering-

TRUE

Flammability is a type of ___________ because burning produces new substances.

chemical

When acid rain falls on limestone, _________ weathering occurs

chemical

One method using the boiling point of water is called ______ because it separates the water from the salt.

distillation

A colloid is a ____________ mixture

heterogeneous

A shirt is an example of a ________________ mixture.

heterogeneous

When sugar salt are mixed together, the properties of the final substances are ________________ those of the beginning substances.

heterogeneous

The resistance of diamond (a form of carbon) to corrosion is a __________________ property.

physical

_____________ has occurred when a stream has sculpted a large rock.

physical