Quiz about Matter-Physical & Chemical Changes

Question 1

Ryan takes three small ice cubes and places them in a glass plate. He leaves them for an hour at the room temperature. Which of these would NOT change in the water after one hour?

Accepted Answer

mass

Answer

temperature

Answer

shape

Answer

physical state

Question 2

Sam wants to demonstrate how water changes from a solid to a gas. He places ice in a pot on a stove. What variable is causing water to change state?

Accepted Answer

the heat from the stove

Answer

the container the ice is placed in

Answer

the temperature of the air surrounding the ice

Answer

the time that has lapsed since the ice was removed from the freezer

Question 3

A solution is a mixture that looks exactly the same everywhere. These mixtures cannot be separated by a filter. Which of these could use a filter to separate the mixture?

Accepted Answer

a mixture of rocks and soil

Answer

a mixture of salt and water

Answer

a mixture of sugar and water

Answer

a mixture of juice and water

Question 4

Which of these actions cause a PHYSICAL change?

Accepted Answer

crushing an aluminum can

Answer

rusting of metal pipes

Answer

burning a log

Answer

cooking an egg

Question 5

Rusting metal is an example of a ____ change.

Accepted Answer

chemical

Answer

phase

Answer

state

Answer

physical

Question 6

Salt water, a mixture, is made by dissolving salt in water. Mixtures like this can be separated by using the physical properties of the mixture. Which would be the best way to separate a mixture made of salt and water?

Accepted Answer

evaporation

Answer

chromotography

Answer

magnetism

Answer

filtering

Question 7

Josh decided to mix some vinegar with baking soda. He knew that a reaction occurred because he made careful observations. He noted that the mixture started to foam up and bubble, and it was white in color. How did Josh know that a chemical reaction occurred?

He was sure a reaction occurred because of

Accepted Answer

the formation of a gas

Answer

the color of the mixture

Answer

the smell of the vinegar

Answer

the volume of the mixture

Question 8

Which is an example of a chemical change?

Accepted Answer

baking a cake

Answer

ripping paper

Answer

stretching a rubber band

Answer

chopping wood

Question 9

Water is one of the most important things to you and to all living things. The fact that you can measure the volume of room temperature water with a beaker is a clue that room temperature water is in liquid form.

If you keep lowering the temperature of the water, it will eventually harden, taking on a definite shape. This means that the water has changed form, into a ___.

Accepted Answer

solid

Answer

plasma

Answer

brick

Answer

gas

Question 10

What physical property would you use to separate these jelly beans?

Accepted Answer

color

Answer

length

Answer

mass

Answer

texture

Question 11

Car windows fog up in cold weather because water vapor condenses on the inside surface of the glass. Condensation occurs when the dew point of the air inside the car is warmer and more humid than the air outside the car window. When warm water vapor touches the cooler glass, the vapor cools down and becomes water.

Which might be the main source of the warm water vapor in a car?

Accepted Answer

people breathing

Answer

leather seats

Answer

ice cold drinks

Answer

car electronics

Question 12

Frank found a pile of wood near a campsite, and he believed it had been chemically changed. What property did Frank most likely observe to believe this?

Accepted Answer

the color of the wood was black

Answer

the surface of the wood felt wet

Answer

the wood had been chewed

Answer

the wood had been chopped

Question 13

Use the basic properties of solids, liquids, and gases to identify the correct state of matter in the image.

Accepted Answer

(A) solid, (B) liquid, (C) gas

Answer

(A) gas, (B) liquid, (C) solid

Answer

(A) liquid, (B) solid, (C) gas

Answer

(A) solid, (B) gas, (C) liquid

Question 14

Casey is given a sample mixture. Which component could be separated with a magnet?

Accepted Answer

iron filings

Answer

calcium carbonate

Answer

glucose

Answer

silica sand

Question 15

Mary collected some pond water to analyze in the science lab. She noticed that the water container had some sand at the bottom and bits of wood floating on top. How can Mary easily separate the sand from the water?

Accepted Answer

filter out the sand

Answer

pick out the sand

Answer

evaporate the water

Answer

shake the water and pour off the sand

Question 16

Franklin stores a gallon of milk in the refrigerator. Three weeks later, he notices that the milk has frozen on the top layer and also smells strongly of a sour odor. Which statement justifies that a physical change has occurred in the milk?

Accepted Answer

The frozen layer on top of the milk can melt into liquid when left at room temperature.

Answer

There is less milk since some of it froze.

Answer

There is a bacterial culture growing in the milk causing the sour smell.

Answer

Some of the milk sugar has been lost, leading to a more sour smell and taste

Question 17

A small bottle of water is left on the shore of a very large lake on an extremely cold winter night. What is MOST LIKELY to be observed the next morning?

Accepted Answer

The bottle of water has become solid but the lake has not.

Answer

Neither the bottle of water or the lake have become solid.

Answer

The lake has become solid but the bottle of water has not.

Answer

Both the lake and the bottle of water have become solid.

Question 18

Choose all three examples of a chemical change.

Accepted Answer

a dead rabbit decomposes

Accepted Answer

a tree is burned in the forest

Accepted Answer

the top of a metal fence rusts

Answer

ice melts in the hot sun

Answer

a block of cheese is cut in half

Question 19

Matter can change: the changes can be physical or chemical. When a physical change happens, nothing new is formed. During a physical change, matter changes form; it can be crushed or torn or change state. When a chemical change occurs, something new is formed. The reactant or reactants change and become something new. For example, a piece of iron can rust. The rust is the new substance that is formed. It is called iron oxide. How can you tell if a chemical change has taken place? There are certain observations you can make:1. temperature change2. color change3. gas or bubbles produced4. an odor is created5. combining two liquids forms a solid called a precipitate.

Ms. Brown asked her students to combine some regular cow's milk with white vinegar. Each group mixed 1 cup of warm milk with 4 tablespoons of vinegar in a glass measuring cup. After stirring the mixture, the students poured the liquids through a strainer into another beaker. The picture above shows the results of mixing warm milk with vinegar. What type of change is this? Explain.

Accepted Answer

It is a chemical change because two liquids mixed together something new and different.

Answer

It is a physical change because it is a mixture of two liquids.

Answer

It is a chemical change because there was a change in temperature of the milk.

Answer

It is a physical change because you can separate the parts with a strainer.

Question 20

Claudia was assigned the task of making a model volcano. To make her volcano erupt, Claudia mixed baking soda and vinegar. When these two substances came in contact with one another they produced bubbles and fizzed making it look like the volcano was erupting. After "erupting" her volcano Claudia's teacher told her that she had created a chemical reaction inside of the volcano. What evidence did Claudia see of a chemical reaction?

Accepted Answer

gas production

Answer

change in odor

Answer

change in color

Answer

light production

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