Molecules
Which state of matter are the molecules: Tightly packed, vibrating
Solid
What's an eample of a liquid turning to a solid?
water freezing
Which states of matter keep their shape?
only solid
What is a solute? Provide example.
Substance being dissolved (salt, sugar)
Dissolve: To mix completely at the particle level
Which state of matter are molecules:
Loosely packed, sliding past each other
What's an example of physical change?
breaking glass, mixing candy, cutting paper
What is volume? Example.
Volume: The amount of space an object occupies - 250 mL
What is the definition of a heterogenous mixture? Provide example for extra 50 points
You can visually see or identify the different components of the mixture, and they don't blend evenly. Examples include salad, vegetable soup, and mixed nuts.
Definition of Evaporation?
the process of turning from liquid into vapor.
Which state of matter are molecules:
Spread far apart, moving freely
Gas
what's an example of chemical change?
iron rusting, burning wood, bubbles forming
What happens to melting?
Molecules move around more freely - more vibrating
What is a solvent? Provide example
Solvent: Substance doing the dissolving (water, vinegar)
How is mass different that weight?
Mass is the amount of matter in an object, while weight is the force of gravity on that object.
Mass is constant, regardless of location, but weight varies depending on the gravitational force.
What happens to molecules when a liquid freezes?
They move closer together and vibrate
What is the definition of Chemical Change?
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. - identity changes
Which states of matter does not have shape?
liquid (container shape), and gas (move around freely)
What is a homogenous mixture? Provide example for extra 50 points
A mixture in which the composition is uniform throughout, meaning the different components are evenly distributed and cannot be distinguished visually. It's also known as a solution, and the components retain their individual properties- sprite, gold, juice, lemonade, tea, coffee
What is an atom?
The smallest unit of an element that still has the properties of that element. It is the basic building block of all matter.
What happens to molecules when a gas (water vapor) turns to liquid (water)?
The molecules become closer together but not tightly, they can still move around
What is the definition of Physical Change?
Physical changes are changes affecting the form of a chemical substance, - identity stays the same
What happens to matter when it's freezing?
molecules tighten together and slow down movement - only vibrate
What is solubility?
Solubility: How much a solute can dissolve into a solvent 0—-1
Salt - high solubility
Plastic - low solubility
What is a molecule? Can you provide an example (extra 50 points)
Molecule: A group of two or more atoms chemically bonded together. Molecules can be made of the same type of atom
Examples:
Oxygen O₂
Water H₂O
Carbon Dioxide CO₂