Name _____________________________________________

What Are Some Physical Changes?Science Words-Physical change [FIZ•ih•huhl CHAYNJ] a change in which a new substance is not formed.

A physical change is a change in a physical property. Soaking, shredding, and crumpling paper are physical changes because they change the physical properties of the paper.

-Mixture [MIKS•cher] a combination of two or more substances that keep their identities

.-These substances can be separated from each other again.

Extra Support for Vocabulary and Concepts

A fruit salad is a mixture.

SolutionsSolution [suh•LOO•shuhn] a mixture in which the substances are evenly mixed

SuspensionOther mixtures: particles or ingredients are suspended or floating in another ingredient.

The ocean is a solution of salt and water.

What Are Some Chemical Changes?Chemical property [KEM•ih•kuhl PRAHP•er•tee] a property that describes how a substance interacts with other substances

Chemical change [KEM•ih•kuhl CHAYNJ] a change in which a substance changes into an entirely new substance

A chemical change causes a new kind of matter to form. A wood fire is a chemical change because it causes wood to change into smoke and ashes.

Burning is also a chemical change

Rust is a chemical change

Chemical reaction [KEM•ih•kuhl ree•AK•shuhn] another name for a chemical change

Like a chemical change, a chemical reaction results in a new kind of matter.

Conservation of mass

The law of conservation of mass says that you cannot make or destroy matter.

You can change matter into a new form.

However the new form will have the same amount of mass as the old form.

A.Choose the best answer:

1-These ice cubes were taken from the freezer and set out on the counter. This picture shows what the ice looks like 5 minutes later.

What kind of change is this?

physical change mixturechemical change. solution.

2-Lupita’s science class is learning about mixtures and solutions. Her teacher

shows the class four beakers. Which beaker contains a solution?Beaker ABeaker BBeaker CBeaker D

3- Which best describes what is in the bowl?

Mixture solution Liquid gas

4-Matter can change. What type of change forms new kinds of matter?

chemical change physical changephysical property solution

5-Which is a chemical change?

burning wood cutting papershaping dough slicing an apple

6-Which of these changes is a chemical change?

freezing meltingmixing rusting

7-When wood burns, it changes to ash. Why is this change a chemical change?The wood has changed in temperature.The wood still has the same properties. The wood has changed shape but is still wood.The wood became a new substance with different properties.

8-Which of the following is a solution?

salt water sand and watermuddy water pepper and water

9-Matter can undergo both chemical and physical changes. Which of the

following is a physical change?

rusting tarnishing making a solution reacting with an acid

10-Aiden uses a balance to measure the mass of an apple. He finds that it is 224 g. Then he cuts the apple into four pieces of varying sizes. What is the mass of the 4 pieces together?

222 g 240 g

224 g 220 g

11-Riley makes three balls out of clay. He puts all the clay balls on a balance and measures the total mass as 56 g. He then pushes the clay into one big ball and measures its mass. Which of the following would be a reasonable mass for the entire ball?

53 g 56 g55 g 59 g

B.Complete each sentence with the correct term from the box.

(Mixture-solution-suspension)

1-A……………………….. is different kinds of matter mixed completely.

2-A……………………….. is two or more substances combined without

changing any of them.

3-…………………………..is when matter is not spread out evenly in a mixture.

Some matter settles to the bottom.

C.Use this space to complete the graphic organizer.

D. Compare between physical and chemical changes: (mention examples)

Physical changes Chemical changes