kenni Science physica/ chemical change Q1 Week 7

What are some example of production of light and/or sound?

-fireworks

-glow sticks

-fire

What are some examples of production of gas?

-vinegar and baking soda

-Aiea seltzer tabs NOT from boiling water or shaking

What are some examples of unexpected color change?

-a nail rust

-mixing clear solutions and it turns pink

-a banana turning

-penny turning green NOT from adding color

What are some example of productions of new Oder?

-chemical change changes the substance into something new with a different smell

-rotten garbage

-spoiled milk

-burnt food

What are some examples of unexpected temperature change?

-mixing two chemicals together and the temperature increases or decreases without adding or removing heat not from heating (on the stove) or cooling (putting in fridge)

What is an example of production of a precipitate?

The creation of a NEW solid substance formed from 2 liquids?

The creation of a NEW solid substance formed by 2 liquids is what?

A precipitate

What production has bubbling, frizzing, and smoking occur (NOT from boiling or shaking?

Production of Gas

Describe the physical property of melting butter.

Solid to a liquid

Describe the physical property of chopping vegetables?

Big pieces to small pieces

Describe the physical change of placing water in a freezer.

Liquid to solid

Describe the physical change of blending a milkshake.

The thickness changes and the structure.

Describe the physical properties of painting on canvas.

Water absorbed on paper towels is a chemical or physical change?

Physical change

An apple rotting is a physical or chemical change?

Chemical change

A copper penny turning green is a chemical or physical change?

Chemical change

Water freezing to form ice is a physical or chemical change?

Physical change

Is boiling water a chemical or physical change?

Physical change

Baking a cake is a physical or chemical change?

Chemical change

Crumpled paper is a physical or chemical change?

Physical change

Burning wood is a physical or chemical change?

Chemical change

Making lemonade is a physical or chemical change?

Chemical change

List 3 words that describe chemical change.

1. Rusting

2. Burning

3. Mixing

List 5 words that describe a physical change.

1. Freezing

2. Shredding

3. Melting

4. Boiling

5. Breaking

What’s the definition of physical changes?

-Changes that only alter/change the state of matter or physical appearance without changing the chemical properties.

-Does NOT make a new substance

-some are reversible and can be undone

Is changing a states such as solid to a liquid a chemical or physical change?

Physical change

Is something “dissolving” a physical or chemical change?

Physical

Is toasting marshmallows a physical or chemical change?

Chemical Change

Is a burning fire a chemical or physical change?

Chemical

Is cooking anything a chemical or physical change?

Chemical change

Is cutting something a chemical or physical change?

Physical change

Is blending something a physical or chemical change?

Physical change

A copper penny turning green is a physical or chemical change?

Chemical change

Is slicing something a physical or chemical change?

Physical change

What is a chemical change?

-Change that alters the chemical/ composition of the substance.

-it makes a NEW substance with NEW properties.

-can be irreversible (NOT be undone) without a chemical change?

Can a chemical change be irreversible without a chemical change?

Yes

Does a physical change make a new substance and explain your answer?

No because the chemical properties are not changing. Only the physical appearance changes.

Does a chemical change change make a new substance? Explain

Yes because it makes new substances and new properties.

What are properties?

Characteristics of substances or materials that can be observed.

List 4 examples of properties

1. Colorr

2. Density

3. Smell

4. Texture

What is thermal energy?

The kinetic energy in a substance.

What is precipitate?

When 2 liquids are combined and go through a chemical change to form a solid

What are some intensive properties?

1. Boiling point

2. Temperature

3. Color

4. Luster

5. Hardness

What are some extensive properties?

1. Volume

2. Mass

3. Weight

4. Size

5. Length