CLMS Science 8 - Unit 2 Review

Student 1 claims that whenever the color of a substance changes, a CHEMICAL change has occurred.

Student 2 claims that food coloring can change the color of a substance WITHOUT causing a chemical change.

Which student is correct?

• Student 1

• Student 2

• They're both right

• They're both wrong

Tags

NGSS.MS-PS1-2

Using your periodic table, determine which set of elements has the MOST similar physical and chemical properties.

• K, Ca, Sr

• K, Cs, Fr

• K, Ca, Rb

• K, Sr, Li

When a chlorine (Cl) atom gains an electron, it becomes

• a negative ion

• a positive ion

• a neutral atom

• a charged compound

How many atoms of Aluminum (Al) are shown in the chemical formula?

• 1

• 2

• 3

• 9

Tags

NGSS.MS-PS1-1

How many atoms of Nitrogen (N) are shown in the chemical formula?

• 1

• 2

• 3

• 9

Tags

NGSS.MS-PS1-1

How many atoms of Oxygen (O) are shown in the chemical formula?

• 1

• 2

• 3

• 9

Tags

NGSS.MS-PS1-1

Which two elements have properties that are MOST similar?

• A & B

• B & C

• C & D

• A & C

A student has a mixture of sugar and water. What is the best method to separate this mixture?

• filtration

• evaporation

• magnetism

• pouring off the water from the mixture

If 100 grams of vinegar and 5 grams of baking soda are poured into a container, a small amount of gas will be produced. What will be the final mass of the products if the gas was trapped in the container?

• 100 grams

• 104 grams

• 105 grams

• 110 grams

Tags

NGSS.MS-PS1-5

If substance A and substance B are mixed together to get substance C, did a chemical reaction take place?

• YES

• NO

• MAYBE

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5