7th-T1 L3: Changes in Matter

Draw

Circle part of a tree that is undergoing the process of changing matter.

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​

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changes the form or appearance of matter but does not turn any substance in the matter into a different substance.

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Physical change

Chemical change

Emotional change

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A ​

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, such as from a solid to a liquid or from a liquid to a gas, is an example of a ​

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.

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change in state

physical change

change in form

Multiple Select

Which are examples of a physical change?

• broken glass

• melting ice

• burning wood

Multiple Select

Other examples of physical changes include _______, ________, ________ and ________. (hint: 4 answers)

• bending

• crushin

• breaking

• carving

• burning

Poll

The ice sculptor breaks ice and shapes ice, but does he or she cause it to change into another substance?

• yes

• no

Multiple Select

Which are visible changes of chemical changes?

• change in color

• release of smell

• release of light

• take in or give off heat

• change in size

Labelling

The images show different types of chemical changes. Identify the changes in properties and other evidence that a new substance has formed.

Tarnishing is the slow combination of a bright metal, such as silver, with sulfur or another substance, which produces a dark coating on the metal.

Drag labels to their correct position on the image

Flames

Gas bubbles

Change in color

Temperature change

Labelling

The images show different types of chemical changes. Identify the changes in properties and other evidence that a new substance has formed.

Oxidation is the combination of a substance with oxygen, as happens when iron rusts.

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Gas bubbles

Change in color

Temperature change

Flames

Labelling

The images show different types of chemical changes. Identify the changes in properties and other evidence that a new substance has formed.

Objects catch fire when a fuel combines rapidly with oxygen, producing heat, light, and new substances.

Drag labels to their correct position on the image

Change in color

Gas bubbles

Temperature change

Flames

Labelling

The images show different types of chemical changes. Identify the changes in properties and other evidence that a new substance has formed.

Bubbles are created by using electricity to break a compound down into elements or simpler compounds.

Drag labels to their correct position on the image

Change in color

Temperature change

Gas bubbles

Flame

Multiple Choice

Is burning a candle an example of a physical or chemical change?

• chemical change

• physical change

Categorize

Options (2)

the matter is essen-

tially the same substancthe matter is basically the same substance

the original substance is transformed into another

substance altogether

Organize these options into the right categories.

What is the difference between a physical and chemical change?

physical change

chemical change

Multiple Choice

How are physical and chemical changes similar?

• They both involve the formation of new substances.
• They both alter matter

• They both involve a change in temperature.

Draw

Count the atoms of each element before and after the chemical change. Fill in the numbers in the appropriate boxes.

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​

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is related to the motion and energy of the particles of matter.

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Temperature

Pressure

Volume

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​

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is the total energy of the motion of all of the particles in an object.

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Thermal Energy

Potential Energy

Kinetic Energy

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Thermal energy naturally flows from ​

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matter to ​

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matter.

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warmer

cooler

liquid

Draw

A polar bear swims in frigid waters of the Arctic, while people relax in a warm geothermal pool in Iceland.

Draw arrows to indicate the direction that thermal energy moves in each image.

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The melting of ice is an ​

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, or a change in which energy is absorbed.

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endothermic change

exothermic change

physical change

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An ​

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occurs when energy is released.

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exothermic change

physical change

endothermic change