7th grade Midterm review Units 1-3 Part 1

Which of the following is a chemical change?

• water freezes to form ice
• sugar dissolves in water
• gasoline burns in a car engine
• a piece of metal expands when it is heated

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

• reactants
• products
• neutrals
• energizers

Tags

NGSS.MS-PS1-5

A change in the shape of an object is an example of _________________.

• a chemical change
• energy
• an endothermic change
• a physical change

What type of change occurs when a new substance is formed that has different properties from the original substances?

• chemical change
• nuclear change
• physical change
• mutation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a chemical change?

• the rusting of iron
• dissolving salt in water
• melting an ice cube
• bending a copper wire

Tags

NGSS.MS-PS1-2

How do chemical reactions turn substances into new substances?

• with burning acid
• the molecules mix together and create new substances
• the atoms break apart and combine back together in new ways
• the ionic compounds mix in water to form solutions

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the diagram, letter D represents a

• subscript

• coefficient

• product

• equation

Tags

NGSS.MS-PS1-1

In the diagram, letter E represents a

• subscript

• coefficient

• product

• equation

Tags

NGSS.HS-PS1-7

Which are the reactants in the equation shown?

• H₂O and CO₂
• O₂ and CH₄

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is the product in the reaction shown?

• Al₂O₃

• Al

• O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5