Chemical and Physical Changes

A __________________ change produces one or more new substances.

• chemical

• physical

• liquid

• solid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of (a)   of Matter states that in any change, the total mass of the substance does not change.

Tags

NGSS.MS-PS1-5

__________________________ is when you observe one or more substances change into one or more new substances.

• liquid reaction

• temperature reaction

• physical reaction

• chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Select which of the following are examples of chemical changes.

• The Statue of Liberty turning green.

• cracking an egg

• tearing a piece of paper

• aging cheese

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following are examples of physical changes?

• cutting your hair

• chewing your food

• digesting your food

• rust on a nail

• breaking a pencil

Which of the following are chemical changes?

• chewing your food

• digesting your food

• fireworks

• baking a cake

• tearing paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is a change in temperature a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is a correct statement about the investigations?

• All of the situations are examples of physical changes because all of the investigations exhibit changes to the physical properties.

• None of the situations are examples of physical changes because they all involve a color change.

• Situation 2 is a physical change because rust forming is a natural process.

• Situations 1 and 3 are physical changes because no new substances are formed.

Tags

NGSS.MS-PS1-2

Three students at Mountain Park Elementary were given an assignment by their science teacher to plan and carry out experiments where chemical changes would occur. The chart shows each student’s plan and the results he or she recorded. Which statement is true about the experiments?

• Student A was the only one to create an experiment where a color change occurred. This shows evidence of a chemical change.

• Student A, Student B, and Student C all created experiments where chemical changes occurred. Student A observed a color change, Student B saw bubbles, and Student C was able to dissolve salt.

• Student B and Student C created experiments were chemical changes occurred. Student A just dyed her water. Student B and Student C both changed their substances to prove that they had chemical changes. Student B created a gas while Student C got rid of the salt.

• Student B was the only one to create an experiment with evidence of a chemical change. She created a new substance, a gas.

Tags

NGSS.MS-PS1-2

What type of change can be easily reversed?

• chemical change

• physical change

• both chemical and physical changes

• neither physical or chemical changes