SCIENCE 4 Q1 WEEK 3

SCIENCE 4 Q1 WEEK 3

Temperature 

has a direct effect on whether a substance exists as a solid, liquid or gas. Generally, increasing the temperature turns solids into liquids and liquids into gases; reducing it turns gases into liquids and liquids into solids.

Heat

 is probably the easiest energy you can use to change the material’s physical state. The atoms in a liquid have more energy than the atoms in a solid. There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid. 

Some materials may change their size, shape and even texture when exposed to different temperatures.

Crayon, margarine, chocolate bar are solid materials. They become liquid when exposed to heat and back its form when cooled.

Quarter 1 – Module 3_Week 4-5: Changes in Properties of Materials when Mixed and when Exposed to Temperature

A mixture is composed of two or more types of matter that can be present in varying amounts and can be separated by physical changes. It is molded when two or more materials are mixed. Solid materials can be combined with other solid materials.

 Mixed materials can be classified depending on the appearance of the resulting mixture. Mixtures can be homogeneous or heterogeneous.

Matter can exist in a solid, liquid, or gaseous state, and the state a substance is in can be largely determined by its temperature. When a certain temperature threshold unique to each substance in the universe is crossed, a phase change will result, changing the state of the matter.

Homogeneous and Heterogeneous mixture

Multiple Choice

What is a mixture that is evenly mixed?

• Compound

• Element

• Heterogeneous mixture

• Homogeneous mixture

Multiple Choice

What type of mixture is a salad?

• Compound

• Element

• Heterogeneous mixture

• Homogeneous mixture

Multiple Choice

Which two solid solutions can be formed a homogeneous mixture?

• coffee powder and sugar

• creamer and cornstarch

• Fruit cocktail and condense milk

• water and sugar

Multiple Choice

The following materials will change its size, shape and texture when heated EXCEPT:

• candle

• egg

• pebbles

• sugar

Multiple Choice

What might happen to ice cube when put outside the refrigerator?

• The ice will dry

• The ice will melt

• The ice becomes solid

• The ice remains the same

Multiple Choice

Homogeneous mixture have the same ____________throughout the mixture.

• Chemical properties

• Composition

• Physical properties

• Stability

Multiple Choice

 The following materials will change its size, shape and texture when heated EXCEPT:

• candle

• sugar

• pebbles

• candle

Multiple Choice

Lira puts an ice water inside the freezer. Which of these will happen to the material?

• The ice will melt

• The ice will dry

• The ice water becomes solid

• The ice remains the same

Multiple Choice

Melted ice cream, chocolate syrup will become solid when_____________.

• put them in a close container

• put them inside the cabinet

• put them inside the freezer

• Exposed them to sunlight

Multiple Choice

Mira wanted to use margarine for her sandwich. But the margarine was frozen since she placed it inside the freezer. What should Mira do to the margarine?

• soak margarine with water

• expose margarine to heat

• mix margarine with hot water

• Let it stay until it melts

Multiple Choice

What safety precautions do you need in handling hot objects?

• Use potholder or thick cloth in handling hot objects

• Use plastic sheets in handling hot objects

• Use face mask in handling hot objects

• Just your hand in handling hot objects

Multiple Choice

Which of the following materials will back to its form when heated and cooled?

• paper

• chocolate bar

• wood

• rubber band

Multiple Choice

What will happen to the solid materials when heated or exposed to heat? When heated,

• solid materials are changed to liquid

• solid materials will evaporate

• solid materials will disappear

• solid materials remain the same

Multiple Choice

A chocolate bar is heated to make it syrup. Which of the following describes what changes happened in the property of the chocolate?

• It changed its odor and taste

• It changed its size and shape

• Its change its shape and color

• No change at all