1. The ability of an apple to change color when exposed to air is a ____.

(1 point)physical property
chemical property
physical change
chemical change

2. Which of the following is NOT a possible sign of a physical change? (1 point)a change in appearance
a change in volume
the release of energy
a change in color

3. When a chunk of dry ice is at room temperature, a cloud of carbon dioxide vapor forms. The carbon dioxide is changing from a ____. (1 point)solid to a liquid
solid to a gas
liquid to plasma
liquid to a gas

4. A solution that contains all the solute it can hold under the given conditions is ____. (1 point)saturated
unsaturated
dilute
supersaturated

5. Which of the following properties is NOT characteristic of acidic solutions? (1 point)has a sour taste
conducts electricity
feels slippery
is corrosive to certain metals

ur a cheater from a school

1.chemical change

Sorry that's all I know!

1.

Density is the relationship between ____. (1 point)

Correct answer (1 pt) mass and volume
Unselected Answer (0 pts) cubic centimeters and pounds
Unselected answer (0 pts) weight and volume
Unselected answer (0 pts) grams and mass

1 /1 point
2.
Which of the following is NOT a possible sign of a chemical change? (1 point)

Correct answer (1 pt) a change in state
Unselected answer (0 pts) a change in color
Unselected answer (0 pts) the release of a gas
Unselected answer (0 pts) the release of energy

1 /1 point
3.
Which of the following is true about an object that floats in water? (1 point)

Unselected answer (0 pts) The object is less dense than frozen water.
Unselected answer (0 pts) The mass of the object is less than that of water.
Correct answer (1 pt) The density of the object is less than that of water.
Unselected answer (0 pts) The volume of the water is greater than the object’s volume.

1 /1 point
4.
Three examples of physical change are ____. (1 point)

Unselected answer (0 pts) boiling water, a nail rusting, and a melting candle
Unselected answer (0 pts) a pond freezing, breaking glass, and a burning candle
Correct answer (1 pt) melting ice, mowing the lawn, and carving a statue
Unselected answer (0 pts) applying lipstick, making lemonade, and baking bread

1 /1 point
5.
Suppose a customer brings a gold bracelet to a jeweler and asks for it to be changed into a gold ring. Which of the following is true? (1 point)

Unselected answer (0 pts) The physical property of color will be changed.
Unselected answer (0 pts) The bracelet will go through a chemical change.
Unselected answer (0 pts) The composition of the bracelet will change.
Correct answer (1 pt) The shape of the gold will change physically.

1 /1 point
6.
Which of the following explains how water causes rocks to weather? (1 point)

Unselected answer (0 pts) Water can melt rock material.
Correct answer (1 pt) Water freezes in the cracks and expands, causing breaks.
Unselected answer (0 pts) Water reacts with the rock and produces gases.
Unselected answer (0 pts) all of the above

1 /1 point
7.
How can you tell that the fireworks exploding during a Fourth of July display do not all contain the same ingredients? (1 point)

Unselected answer (0 pts) different colors of explosions
Unselected answer (0 pts) different shapes of explosions
Unselected answer (0 pts) different timing of explosions
Correct answer (1 pt) all of the above

1 /1 point
8.
Which of the following explains why the chemical products from a reaction have a different mass than the chemicals at the beginning? (1 point)

Unselected answer (0 pts) The products are heavier and sink.
Unselected answer (0 pts) The products are lighter and rise.
Correct answer (1 pt) The products are a gas and escape into the air.
Unselected answer (0 pts) The products are a solid and have more mass.

1 /1 point
Fill in the Blank
9.
The main difference between physical and chemical changes is that _______ changes are not reversible. (1 point)
Correct answer (1 pt) chemical
(0 pts) physical
1 /1 point

1. To determine the correct answer, we need to understand the definitions of physical property, chemical property, physical change, and chemical change.

- A physical property refers to a characteristic of a substance that can be observed or measured without changing the substance's chemical composition.
- A chemical property, on the other hand, describes a substance's ability to undergo a chemical change and form new substances.
- A physical change refers to a change in a substance that does not result in the formation of new substances. The chemical composition of the substance remains the same. Examples include changes in state, shape, or size.
- A chemical change, also known as a chemical reaction, occurs when the chemical composition of a substance is altered, resulting in the formation of new substances.

In this case, the ability of an apple to change color when exposed to air involves a chemical change. The apple undergoes a chemical reaction with oxygen in the air, causing the color to change. Therefore, the correct answer is "chemical property."

2. To determine the correct answer, we need to identify which option is not a characteristic of a physical change.
- A change in appearance is a common sign of a physical change since physical changes do not result in the formation of new substances.
- A change in volume can also occur during physical changes, such as when a substance expands or contracts.
- The release of energy can happen in both physical and chemical changes, as energy can be gained or lost during these processes.
- However, a change in color is often associated with a chemical change rather than a physical change since it involves a change in the chemical composition of the substance.

Therefore, the correct answer is "a change in color."

3. To determine the correct answer, we need to understand the different states of matter and changes between them.
- When a substance changes from a solid to a liquid, it undergoes melting.
- When a substance changes from a solid to a gas without becoming a liquid, it undergoes sublimation.
- When a substance changes from a liquid to a gas, it undergoes evaporation or boiling.
- When a substance changes from a liquid to a plasma, it undergoes ionization, which is not relevant in this case.

In the given scenario, the carbon dioxide is changing from a solid (dry ice) to a gas (carbon dioxide vapor) without becoming a liquid. Therefore, the correct answer is "solid to a gas."

4. To determine the correct answer, we need to understand the concept of solubility.
- A saturated solution is a solution in which the solvent has dissolved the maximum amount of solute possible under the given conditions. It is unable to dissolve any additional solute.
- An unsaturated solution is a solution in which the solvent is capable of dissolving more solute under the given conditions.
- A dilute solution is a solution that contains a relatively small amount of solute in relation to the solvent.
- A supersaturated solution is a solution in which the solvent has dissolved more solute than it should be able to dissolve under the given conditions.

In this case, a solution that contains all the solute it can hold under the given conditions is referred to as a saturated solution. Therefore, the correct answer is "saturated."

5. To determine the correct answer, we need to identify the properties that are characteristic of acidic solutions.
- Acids generally have a sour taste.
- They can conduct electricity when dissolved in water, as they produce hydrogen ions (H+) that can carry electric charge.
- Acids can be corrosive to certain metals, causing them to react and dissolve.
- However, acidic solutions do not typically feel slippery. The feeling of slipperiness is commonly associated with alkaline (basic) solutions.

Therefore, the correct answer is "feels slippery."