Tiny Particles, Big Matter
Everything around us is made up of what?
Matter
When ice melts into water, does its total mass change?
No
What tool measures how heavy something is?
A scale or balance.
When you stir sugar into water, does it make a new substance?
No, it is a mixture.
What are three common states of matter?
Solid, Liquid, Gas
True or False: Air is made of matter.
True
What does it mean when we say "matter is conserved"?
The total amount of matter stays the same even when it changes form.
Which property describes how well a material lets heat pass through it?
Conductivity
When baking soda and vinegar mix and bubble, what evidence shows a new substance formed?
The Gas bubbles that are produced.
When water turns into ice, is it still matter?
Yes
What are the tiny building blocks that make up all matter?
Particles or atoms
If you mix 100g of water with 10g of salt, what is the total mass?
110g
You have four inknown metals. You drop them in water and one floats. What property helps you identify it?
Density.
What do we call a change where a new substance is formed?
A chemical change.
You mix sand and salt together. How could you sperate them?
Add water to dissolve the salt, then filter and evaporate the water from the sand.
If you can't see sugar after it dissolves in water, where did it go?
It's still there-the particles are too small to see.
When woodburns, it seems to lose mass-where does it goes?
Into gases released in the air (still matter, just a diffeent form)
What are some properties you coild use to identify an unknown solid?
Color, texture, hardness, mgnetism, density, luster
How can you tell the difference between a physical and chemical change?
Chemical: new substance forms. Physical: Appearance changes, substance stays the same.
What happens to particles when matter is heated?
They move faster, and spread further apart.
Describe an example that shows matter is made of particles too small to see.
Example: A balloon inflates because air (made of particles) takes up space inside.
Example: A single water droplet is made of 3 elements/atoms.
What could you use to prove that mass is conserved when water freezes into ice?
A scale- the weight will be the same before and after freezing.
How could you tell the difference between salt and sugar without tasting them?
Test how they dissolve or look under magnification.
Gicw an example of two substances that form a new subsstance when mixed.
Example: Baking soda and vinegar= carbon doxide gas
True or False: When two liquids are mixed and a solid forms, a new substance is formed.
True