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

• A piece of cloth is cut into strips

• A glass of milk turns sour

• A piece of wood burns

• A metal nail rusts

Jenny put a jar with 100g of water in the freezer until all the water turned into ice What is the mass of the ice?

• It is 100g

• It is less than 100g

• It is more than 100g

• It depends on how cold the freezer was

Which of these has physical properties?

• a thought

• a shout

• music

• steam

Which of these can happen without a change in temperature?

• water evaporates

• vapor condenses

• glass melts

• Iron rusts

Which of these can occur when matter changes state?

• Its mass increases

• Some heat is absorbed

• Rust forms on its surface

• A new substance is formed

Which of these is an example of a substance at its melting point?

• dew forming on grass

• ice turning into a liquid

• the water level in a lake decreasing

• bubbles forming in a pot of water on a stove

Which of these is most likely a sign that a substance has had a chemical change?

• Its volume changes

• Its shape changes

• Its color changes

• Its state changes