When chemicals react with each other to make new chemicals, it's called _____

• a physical reaction
• a chemical reaction
• a chemical equation
• rusting

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The chemical H₂O is commonly known as _____

• vinegar
• salt
• sugar
• water

Tags

NGSS.MS-PS1-1

Water is _____

• two parts O and one part H
• two parts H and one part O
• one part H and one part O
• two parts H and two parts O

Tags

NGSS.MS-PS1-1

The H in H₂O stands for _____

• hydrogen
• helium
• hafnium
• half-and-half

Tags

NGSS.MS-PS1-1

The O in H₂O stands for _____

• hydrogen
• oxygen
• okay
• only water

Tags

NGSS.MS-PS1-1

When electricity was run through water, and the gases were collected, there was _____

• the same amount of hydrogen and oxygen
• half as much hydrogen as oxygen
• twice as much oxygen as hydrogen
• twice as much hydrogen as oxygen

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What element in the air causes iron to rust?

• oxygen
• nitrogen
• hydrogen
• helium

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical symbol for iron?

• Ir
• I
• F
• Fe

What tiny particles separate and recombine with elements during chemical reactions?

• protons
• electrons
• neutrons
• photons

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When hydrogen and oxygen recombine they create a little bit of _____

• rust
• iron dust
• water vapour
• steel wool

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5