Basic Matter
What is the smallest particle for all of matter?
atom
Which observation indicates that a chemical change has occurred?
A. A candle melting
B. Sugar dissolving in water
C. Formation of bubbles during a reaction
D. Breaking a cookie into pieces
C. Formation of bubbles during a reaction
A ______ is when two or more substances are combined but they keep their own properties.
mixture
TRUE OR FALSE: The law of conservation of matter states that matter cannot be created or destroyed.
True
What is a group of two or more atoms bonded together called?
molecule
What type of change is a broken mirror?
Physical Change
A ______ is a type of mixture in which the substances are not evenly distributed throughout.
heterogenous
A student has 50g of warm water in a container. The student takes 2g of sugar and places it in the container and seals it. How much mass (grams) does the container have?
52g
This phase change occurs when a liquid turns to a gas.
Physical Change
What is solubility?
Solubility is the measurement of whether something dissolves in a liquid.
If you dissolve sugar in water, why does the total mass of the sugar-water solution equal the mass of the water plus the mass of the sugar?
A. Because the sugar disappears in the water
B. Because matter cannot be created or destroyed
C. Because sugar is lighter than water
D. Because the sugar turns into water
B. Because matter cannot be created or destroyed
What state of matter has no definite shape or volume?
gas
What happens to atoms when heat is added?
Atoms get farther apart and move faster.
True or False: Physical Changes are often just a phase change.
True
What does dissolve mean?
Dissolve means to break down in a liquid.
When water evaporates from a puddle, what happens to the atoms?
A. They disappear completely
B. They turn into air
C. They change into a gas form and enter the atmosphere
D. They are destroyed by the sun's heat
C. They change into a gas form and enter the atmosphere
Name an object/item that is a solid, liquid, and gas.
Miss Till will determine if your answer is correct.
What is freezing point? YOU MUST ALSO TELL ME THE TEMPERATURE.
Freezing point is the temperature at which a liquid turns to a solid. It occurs at 32 degrees Fahrenheit (0 degrees Celsius).
What factors tell us a chemical change has occured?
What is the difference between solute and solvent?
Solvent is the substance that does the dissolving (the liquid). Solute is the substance that dissolves in the liquid.
When an ice cube melts in a sealed glass, what happens to the total mass of the container and its contents?
A. Increases because liquid takes up more space
B. Stays exactly the same
C. Decreases because ice is heavier than water
D. Changes depending on room temperature
B. Stays exactly the same