When a substance undergoes a physical change:

1. The same particles remain after the change: This is correct. In a physical change, the substance may change its state or form, but the particles or molecules that make up the substance remain the same. For example, when water freezes into ice, the water molecules are still the same, they've just rearranged into a different form.

2. A new substance is produced: This is incorrect. A new substance is produced during a chemical change, not a physical change. In a physical change, the substance may change its form or state, but it is still the same substance.

3. The particles move to new positions, speed up or slow down: This is correct. In a physical change, the particles of the substance can move to new positions or change their speed. For example, when water boils into steam, the water molecules move faster and spread out into a gas.

4. The particles can change speed, but not position: This is incorrect. In a physical change, the particles can change both speed and position. For example, when ice melts into water, the water molecules slow down and move closer together.

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When a substance undergoes a physical change:

1. The same particles remain after the change: This is correct. In a physical change, the substance may change its state or form, but the particles or molecules that make up the substance remain the same. For example, when water freezes into ice, the water molecules are still the same, they've just rearranged into a different form.

2. A new substance is produced: This is incorrect. A new substance is produced during a chemical change, not a physical change. In a physical change, the substance may change its form or state, but it is still the same substance.

3. The particles move to new positions, speed up or slow down: This is correct. In a physical change, the particles of the substance can move to new positions or change their speed. For example, when water boils into steam, the water molecules move faster and spread out into a gas.

4. The particles can change speed, but not position: This is incorrect. In a physical change, the particles can change both speed and position. For example, when ice melts into water, the water molecules slow down and move closer together.

Knowee AI · Accepted Answer

When a substance undergoes a physical change:

1. The same particles remain after the change: This is correct. In a physical change, the substance may change its state or form, but the particles or molecules that make up the substance remain the same. For example, when water freezes into ice, the water molecules are still the same, they've just rearranged into a different form.

2. A new substance is produced: This is incorrect. A new substance is produced during a chemical change, not a physical change. In a physical change, the substance may change its form or state, but it is still the same substance.

3. The particles move to new positions, speed up or slow down: This is correct. In a physical change, the particles of the substance can move to new positions or change their speed. For example, when water boils into steam, the water molecules move faster and spread out into a gas.

4. The particles can change speed, but not position: This is incorrect. In a physical change, the particles can change both speed and position. For example, when ice melts into water, the water molecules slow down and move closer together.

When a substance undergoes a physical change:Hint: There may be more than one correct answer.the same particles remain after the changea new substance is producedthe particles move to new positions, speed up or slow down the particles can change speed, but not positionI'm not sure

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