Topic 2

How is a solid different from a liquid? How are a solid and liquid different from gas?

• Solid particles are spread apart with no definite shape. A liquid does not have a definite a definite shape. Both have a definite volume, which makes them the same as gas. A gas does not have a definite mass or volume.

• A solid has a definite shape. A liquid has a definite a definite shape. Both have a definite volume, which makes them different from a gas. A gas does have a definite shape.

• A solid has a definite shape. A liquid does not have a definite a definite shape. Both have a definite volume, which makes them different from a gas. A gas does not have a definite mass or volume.

• A solid does not have shape. A liquid does have a definite a definite shape. Both have a definite volume, which makes them different from a gas. A gas does have a definite mass or volume.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which process is an example of a chemical change?

• Mixing salt and water
• Cutting paper
• Burning wood
• Bread is toasted

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to the particles of substances when a chemical change occurs​ ?

• The particles rearrange to form a different substances

• The particles stay the same
• The particles disappear completely
• The particles break down into smaller particles

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement describes something that occurs only during physical change?

• New substance form.

• Chemical Properties change.

• The substance gain or lose mass.

• The properties of substances stay the same.

Which statement describes what happens when sugar dissolves in water?

• Sugar particles attach to the water particles.

• A new substance with new properties forms.

• The sugar particles change into a different kind of particle.

• The particles of both substances become evenly spread apart.

Tags

NGSS.MS-PS1-2

Which pictures shows evidence of both chemical change and a physical change?

• 
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• 
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Tags

NGSS.MS-PS1-2

How do you know that chemical change has occurred?

• When a chemical change occurs, a new substance is formed. The new substances have different properties than the original substances.

• When a chemical change occurs, the substance stays the same.

• When a physical property occurs, a new substance is formed. The properties stay the same.

• When a chemical change occurs, the substances stay the same. The same substances have the same properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The scientist added 1.5 grams of a solid to 1.5 grams of a liquid. Can you predict the total weight of the substances after the materials were mixed?

• The substances weigh 4.5 grams

• The substances weigh 1.5 grams

• The substances weigh 3 grams

• The substances weigh 0 grams

Tags

NGSS.MS-PS1-5

Which of the following is evidence of a chemical change having taken place?

• New substances were made.

• The substances cancel each other.

• It separates into different layers.
• It mixed together but can be separated.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can you tell that a change in a material is a physical change?

• It created a solution

• It mixed together to form a new substance.

• It is the same substance before and after change.

• It is a different substance after the change.

Tags

NGSS.MS-PS1-4