Physical Property
Define: physical change
A change in the physical property of matter that can be measured without changing the composition of an object.
Any characteristic that gives a substance the ability to undergo a change that results in a new substance
What is a chemical change?
What planet is known as the red planet?
Mars
Name TWO physical properties
color, density, hardness, shape, mass, melting and boiling points
DOUBLE POINTS!
What chemical changes were observed in our experiment when we poured hydrochloric acid into our magnesium metal Bonus points: what was the new substance that was created?
Change in temperature, bubbling or fizzing, production of a new substance, a gas (specifically magnesium chloride and hydrogen gas)
What is the most common physical change?
A change in state of matter (water changing from solid, to liquid, to gas)
What gas do humans need to breathe in order to survive?
Oxygen
DOUBLE POINTS!
These are the 3 states of matter
What are solid, liquid, and gas?
What substance is formed when metal reacts with oxygen and water?
Rust
When wood meets too much heat it does what?
burn
What is the largest organ in the human body?
Skin
The physical state of matter depends on it's...
Temperature
Anna's Dad cleans the house with homemade cleaning liquids. One day, she was watching him. He mixed vinegar with baking soda in a container. The mixture started to create foam and bubble! What did this chemical change produce?
It produced a gas
What happens to a liquid when it reaches 0 degrees Celsius (32 degrees Fahrenheit)?
The temperature at which water changes to a solid (ice)
DOUBLE POINTS!
What is an example of a chemical change?
An apple turning brown, rust, burning something, tarnishing, etc.
What force keeps you from floating away Earth?
Gravity
What is the temperature at which water boils?
212 degrees Fahrenheit
Name TWO different indicators of a chemical change.
Color change, temperature change, creation of a new substance, production of a gas, producing an odor, etc.
True or False: A chemical change is irreversible.
True (fruit rotting, wood burning etc.)
cracking eggs and mixing them in a bowl is a...
Physical change
What blood cells help your body fight infections?
White blood cells