physical chemical change endo exo

Which of the following properties can change during a physical change?

• shape

• pH level

• flammability

• reactivity

True or False: a physical change may produce a new substance.

• True
• False

Which of the following is an example of a precipitate?

• liquid evaporating into gas
• a solid formed from a frozen liquid
• a chunk solid formed from two liquids combining
• a liquid solution that contains two substances

Which of the following is an example of a physical change?

• sugar and oxygen reacting to produce water and carbon dioxide
• honey dissolving in tea
• a raw egg being cooked
• metal rusting after being left out in the rain

A physical change can sometimes result in a color change. Which of the following situations show this?

• Milk turns yellow when it spoils.
• Dough becomes darker when it is baked into cake.
• A red candy dissolves and turns water pink.
• A match turns black when it is burned.

Which of the following physical changes shows a change in a substance's state of matter?

• a piece of paper being torn in half
• clay being molded into a bowl
• an ice cube being crushed
• liquid water becoming steam

Which is a physical change?

• burning match 
• vinegar in baking soda 
• melting butter
• cooking an egg

Tags

NGSS.MS-PS1-4

Which of the following is a chemical property of water?

• Reacts with pure sodium.
• Boils at 100 ^oC.
• Dissolves sugar easily. 
• Has a density of 1 gm/mL

Tags

NGSS.MS-PS1-2

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties
• liquid properties
• real properties

Tags

NGSS.MS-PS1-2

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2