Changes
Melted ice cubes are an example of: ___________.
Physical Change
When heat is added to ice, what happens to the particles?
Particles go from a solid to a liquid. Particles are still close, but not uniformly packed.
What property stays the same during physical and chemical changes?
a. density
b. shape
c. mass
d. arrangement of particles
c. mass
When a pan balance is even, this means:
a. the objects have no weight
b. one object has less weight
c. the objects have the same weight
d. one object has more weight
c. the objects have the same weight
Water can change from one state to another. What happens when water changes state?
a. some matter is lost
b. some matter is gained
c. matter is lost and gained
d. matter is not lost nor gained
d. matter is not lost or gained
How can you make liquid water become solid?
a. put the water in a very cold place
b. heat the water on the stove
c. shake the water container very fast
d. add a lot of salt to the water
a. put the water in a very cold place
When water freezes into an ice cube, the particles _____________.
a. will never be the same
b. do not change in density
c. become more tightly packed together
d. become less tightly packed together
c. become more tightly packed together
A glass of ice water is placed on a table. The ice inside the glass melts. What happened to the matter in the glass?
a. the combined mass is the same before and after the ice melts
b. the mass of the glass and its contents is less after the glass melts
c. the contents of the glass are wet before and after the ice melts
d. the contents of the glass are colorless before and after the ice melts
a. the combined mass is the same before and after the ice melts
A glass of water contains 300 grams of water. A student puts 25 grams of sugar in the water and stirs until the sugar cannot be seen. What is the mass of the mixture?
a. 25 grams
b. 275 grams
c. 300 grams
d. 325 grams
d. 325 grams
When you burn a candle, all that remains is a small puddle of wax. The puddle of wax has less mass than the original candle. The rest of the candle's mass was:
a. destroyed
b. changed to gases
c. measured incorrectly
d. none of the above
b. changed to gases
When water is boiling on a stove, it is changing from:
a. solid to liquid
b. solid to gas
c. liquid to a solid
d. liquid to a gas
d. liquid to a gas
An example of a heterogeneous mixture:
a. glue
b. honey
c. coffee
d. milk and cereal
d. milk and cereal
When a new substance is formed with different properties than the original substance, it is called a:
a. chemical change
b. physical change
c. freezing
d. boiling
a. chemical change
Ari makes 6 cookies out of dough. He puts all of the cookies on a balance and the total weight is 36 grams. He then combines all of the dough into one big ball. What is the weight of the entire ball?
a. 6 grams
b. 30 grams
c. 36 grams
d. 42 grams
c. 36 grams
Does mixing cereal with milk make a new substance?
a. Yes because the color of the milk changed.
b. Yes because the sugar dissolved and the cereal got wet.
c. No because mixing substances cannot make new substances.
d. No because you can separate the cereal from the milk to get the original substances back.
d. No because you can separate the cereal from the milk to get the original substances back
Which of the following is an example of a physical change?
a. mixing baking soda and vinegar together, causing bubbles and foam
b. a glass cup falls from the counter and shatters on the ground
c. lighting a piece of paper on fire and paper burns and leaves ashes
d. baking a birthday cake for your mother
b. a glass cup falls from the counter and shatters on the ground
In this state of matter, the particles move quickly and are spread far apart.
Gas
What is true of a mixture?
a. it is always thicker than the two chemicals that go into it.
b. it retains the properties of the substances that make it up
c. it can never be separated
d. it is produced through chemical reactions
A student measures the mass of ice and liquid water and places the mixture into a freezer. The weight of the ice is 50 grams. The weight of the water is 75 grams. What will the student have at the end of the day?
a. 100 grams of ice
b. 125 grams of ice
c. 125 grams of liquid water
d. 150 grams of liquid water
b. 125 grams of ice
Adan placed a shovel into damp soil. A few weeks later, he took the shovel from the ground and the surface of the shovel had a reddish color. What happened?
a. the shovel rusted in the damp soil
b. the steel changed into aluminum
c. the shovel burned in the hot sun
d. the steel changed into copper
a. the shovel rusted in the damp soil
How does water change as it evaporates?
a. its weight and volume increase
b. its weight and volume decrease
c. its weight increases, its volume is remained unchanged
d. its weight remains unchanged, its volume increases
d. its weight remains unchanged, its volume increases
Describe how particles are packed in a solid, liquid, and gas.
Liquid-close together, no definite shape, can move
Gas-spread apart, move quickly, no definite shape
This property of matter determines whether or not an object will float or sink in water.
Density
What tool can you use to find a liquid's volume?
Graduated cylinder
Sand, water, and stones are combined with cement mix. The combination hardens into a strong, rock-like substance called cement. Which statement is true?
a. the cement is a new alloy
b. the cement is a new mixture
c. the cement is formed into a new substance with properties similar to its ingredients
d. the cement formed is a new substance with properties different from its ingredients
b. the cement is a new mixture