Show:
Physical Changes
Chemical Changes
Solutions
Mixtures
Odds and Ends
100
Which of the following is a physical change? burning evaporating rusting tarnishing
evaporating
100
Chemical change? vinegar and baking soda or blowing up a balloon
vinegar and baking soda
100
Which of the following is a solution? sand and water salt water muddy water pepper and water
salt water
100
Which is a mixture? salt water sugar water muddy water ice tea
muddy water
100
Physical or Chemical change? An old car rusting in a city dump
chemical change
200
Physical changes: tearing paper or toasting bread?
tearing paper
200
Which is a chemical change? food digesting or flowers being cut?
food digesting
200
List all that are solutions: -sand and water -salt water -ice tea -water
salt water ice tea
200
Do mixtures have solvents and solutes? Yes or no
No
200
Physical change or chemical change? ice melting in the sun
Physical change
300
Which of the following is a physical change? -rusting -making a solution -reacting with an acid
making a solution
300
What chemical property causes iron to become a crumbly, brownish-orange substance over time? -its ability to rust -its ability to burn -its ability to bend -its ability to tarnish
Its ability to rust.
300
I make chocolate milk using chocolate powder and milk. Which is true? -The chocolate powder is a solute -The chocolate powder is a solvent -The chocolate powder is a solution
The chocolate powder is a solute
300
What is a mixture? -a combination of substances that give off gas -a combination of substances that keep their identities -any type of matter that evaporates when heat energy is applied
a combination of substances that keep their identities
300
One silver earring is left on the dresser and one is placed is a special box to prevent tarnishing. The one left out tarnishes. Which is true? -tarnishing is a change in mass -tarnishing is a chemical change -tarnishing is a change in state of matter -tarnishing is a physical change
Tarnishing is a chemical change.
400
List all of the following that are physical changes: -a balloon popping -a match burning -a candle melting -dry ice turning to gas -flowers being cut from the garden
a balloon popping a candle melting dry ice turning to gas flowers being cut from the garden
400
Which of the following is ONLY chemical changes? -iron rusting, glass breaking, plastic stretching -leaves rotting, wax melting, wood burning -milk spoiling, food digesting, leaves rotting -ice melting, water boiling, salt dissolving in water
milk spoiling, food digesting, leaves rotting
400
If water is acting as a solvent, which is true? -the water evaporates -the water changes state -the water dissolves the sugar -the water changes the sugar to gas
The water dissolves the sugar.
400
I make a salad dressing with oil and vinegar. After mixing, the oil is on top of the vinegar. What can I conclude? -oil is a solvent and vinegar is a solute -the oil and vinegar have formed a mixture -the oil and vinegar have formed a solution
The oil and vinegar have formed a mixture.
400
When wood burns, which is true? -new substances form, but the mass of the matter stays the same -new substances form, and the mass changes. -now new substance forms, but the mass remains the same
new substances form, but the mass of the matter stays the same
500
Which of the following is ONLY physical changes? -iron rusting, glass breaking, plastic stretching -leaves rotting, wax melting, glass breaking -paper ripping, food digesting, leaves rotting -ice melting, water boiling, paper ripping
ice melting, water boiling, paper ripping
500
What is a chemical property? -any property related to color and shape -any property related to size and weight -any property that causes matter to stay the same -any property that describes how a substance
any property that describes how a substance interacts with other substances
500
Which of the following are solutions? -food coloring and water -sand and water -marbles and water -coffee
food coloring and water coffee
500
What is true about mixtures? -a solvent is needed -a solution is formed -the parts keep their identities -the parts lose their identities
the parts keep their identities
500
What would be the best way to keep steel wool from rusting? -keep it slightly moist -moisten it but expose it to the air -keep it dry and sealed in a plastic bag -moisten it and keep it in a sealed plastic bag
keep it dry and sealed in a plastic bag