HON Physical and Chemical Changes

​What is the difference between "Property" and "Change"?

Properties:
Characteristics of a substance that can be measured.

Used to describe an object

Changes:
Actions that can change the properties of Matter.

Describes what happens to a substance

Multiple Choice

What is the difference between a property and a change in matter?

• A property can be measured, a change is an action

• a change describes, and a property is a verb

• A property is visible, while a change is invisible

• A property is temporary, a change is permanent

Draw

What is one physical change that can be applied to the object on the right?

Draw

What is one physical change that can be applied to the object on the right?

Draw

What is one physical change that can be applied to the object on the right?

Multiple Select

Which of the following are examples of physical changes involving size and shape?

• Cutting paper

• Burning wood

• Grinding spices

• Bending metal

Multiple Choice

Physical changes can be reversible or irreversible. Which of the following is an example of an irreversible physical change?

• Freezing water

• Squishing clay

• Breaking glass

• Melting ice

Open Ended

What is the evidence that a physical change has occurred in the picture of the nail?

Open Ended

What is the evidence that a physical change has occurred in the picture of the ice cream cone?

Open Ended

What is the evidence that a physical change has occurred in the picture of pizza?

Multiple Choice

Which of the following best describes a chemical change?

• A change in which new substances are formed

• A change in which the shape of a substance is altered

• A change in which a substance is mixed

• A change in which a substance is dissolved in water

Multiple Select

Which of the following are examples of chemical changes?

• Burning

• Rusting

• Cooking

• Oxidizing

Open Ended

Why is the picture at the right of boiling water NOT a chemical change even though a "gas is produced?"

Open Ended

A watermelon is green, but when it breaks you can see red. Why is this NOT a chemical change even though a "color change occured?"

Multiple Choice

What is a physical property?

• It changes how a substance looks

• It changes into a new substance

• It describes a substance

• It explains how a substance can change

Multiple Choice

What is a physical change?

• It changes how a substance looks

• It changes into a new substance

• It describes a substance

• It explains how a substance can change

Multiple Choice

What is a chemical property?

• It changes how a substance looks

• It changes into a new substance

• It describes a substance

• It explains how a substance can change

Multiple Choice

What is a chemical change?

• It changes how a substance looks

• It changes into a new substance

• It describes a substance

• It explains how a substance can change

Categorize

Options (13)

density

color

shape

mass

volume

ductility

malleablility

flammable

can oxidate

reactivity

can decay

can tarnish

state of matter

Sort the properties into physical or chemical:

Physical

Chemical

Categorize

Options (16)

boiling water

melting ice

freezing water

dissolving sugar in water

cutting wood

grinding coffee beans

mixing sand and water

stretching rubber

rusting iron

burning wood

digestion of food

photosynthesis

fermentation of sugar

souring milk

explosion of fireworks

reaction of vinegar and baking soda

Sort the changes into physical or chemical:

Physical

Chemical

Categorize

Options (6)

change is size

changes in shape

change in state of matter

change in color

making a gas

change in temperature

Sort the SIGNS of changes into physical or chemical:

Physical

Chemical

Open Ended

What happens to water in the water cycle after it evaporates?

Open Ended

Where does the carbon dioxide that plants need for photosynthesis come from?

Open Ended

If I mix 45 grams of water with 45 grams of sugar how much sugar-water do I make?

Open Ended

If I have 400 grams of soda and I drink 250 grams how much is left?

Multiple Choice

If I mix 30 grams of chocolate powder into 100 grams of milk, how much chocolate milk do I make?

• 70 g

• 3000 g

• 3.34 g

• 130 g

Draw

If I have 6 atoms of Hydrogen and 3 Atoms of Oxygen how many water molecules can I make?

Multiple Choice

Match the reactants from this chemical change to the products made:

Multiple Choice

Match the reactants from this chemical change to the products made:

Multiple Choice

Match the reactants from this chemical change to the products made:

Multiple Choice

Match the reactants from this chemical change to the products made:

Multiple Choice

Match the reactants from this chemical change to the products made:

Open Ended

How does the Law of Conservation of Energy apply to the food we eat?

Open Ended

Where does the energy our houses get from power plants come from?

Multiple Choice

What does the Law of Conservation of Energy state?

• Energy cannot be created, but it can be destroyed

• Energy can be created and destroyed

• Energy cannot be created or destroyed

• Energy can be created, but not destroyed

Multiple Choice

A kitchen uses 100 W of energy on the refrigerator, 50 W of energy on the stove, and 20 W on the lights. How much total energy is the kitchen using?

• 170 W

• 200 W

• 30 W

• 130 W

Multiple Choice

A ringing cell phone requires 10 W for sound energy, 5 W for light energy, and 15 W for kinetic energy (vibration). How much energy does this phone use during a call?

• 30 W

• 5 W

• 150 W

• 750 W

Multiple Choice

A cell phone battery holds 1000 W of energy. Jayven uses 200 W of energy per hour playing games on his phone. How many hours can he play games on his phone until the battery runs out?

• 100 hours

• 5 hours

• 20 hours

• 8 hours

Multiple Choice

When does do the Laws of Conservation of Energy and Mass apply?

• ALWAYS

• On Earth and other planets

• Everywhere except black holes

• Since 5000 BCE