HCLA 8th Grade Science Test

What type of change occurs when a straight piece of wire is coiled to form a spring?

• Physical change

• Chemical change

• No Change

What type of change occurs when you blow dry your hair?

• Physical change

• Chemical change

• no change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What type of change occurs when reddish brown spots appear on a knife due to oxidation from not being dried after washing?

• Chemical change

• Physical change

• no change

Tags

NGSS.MS-PS1-2

When baking biscuits what type of change occurs when the baking powder reacts to release carbon dioxide bubbles causing the dough to rise?

• Chemical change

• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

You make toast in the toaster and the bread turns black due to being left in the toaster too long. What type of change occurred?

• Chemical

• Physical

• No Change

Tags

NGSS.MS-PS1-2

Chewing food to break it down into smaller particles represents a _______ change, while the changing of starch into sugars by enzymes in the digestive system represents a _____ Change?

• Physical; Physical

• Physical; Chemical

• Chemical; Chemical

• Chemical; Physical

Tags

NGSS.MS-PS1-2

Which of the following best describes a chemical reaction?

• A description of a reaction using numbers and formulas

• An equation that shows the balance of elements in a compound.

• A representation of elements bonding with each other

• A way to show the number of atoms in a substance

What do element symbols represent?

• compounds

• Substances produced by a chemical reaction

• Elements

• Molecules

Where can element symbols be found?

• In a chemical formula

• On the periodic table

• In a chemical equation

• In a chemical reaction

What does a balanced equation mean?

• The equation shows the correct order of reactants and products

• The equation represents a reversible reaction

• The equation includes the correct number of atoms on each side of the arrow

• The equation shows the maximum amount of products that can be formed

Tags

NGSS.MS-PS1-5