Sc 8 P 8 9

Based on this table, which of the following statements is correct?

• Orange juice is more acidic than black coffee

• Stomach acid is more basic than orange juice

• Bleach is more acidic than household ammonia

• Toothpaste is more basic than household ammonia

Tags

NGSS.MS-PS1-2

Carbon (C) and hydrogen (H) can be chemically combined to form a new substance called methane (CH₄). Which statement below best describes how the new substance compares to carbon (C) and hydrogen (H)?

• The new substance methane (CH4) has the same properties as carbon (C)

• The new substance methane (CH4) has the same properties as hydrogen (H)

• The new substance methane (CH4) has different properties than only hydrogen (H)

• The new substance methane (CH4) has different properties than both carbon (C) and hydrogen (H)

Tags

NGSS.MS-PS1-2

H₂ is...

• a compound

• an element

• a heterogenous mixture

• a homogeneous mixture

Tags

NGSS.MS-PS1-1

O is...

• a compound

• an element

• a heterogenous mixture

• a homogeneous mixture

When magnesium (Mg) metal is burned in the presence of oxygen gas (O₂), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different from the individual properties of magnesium and oxygen because magnesium oxide is

• a solution

• a mixture

• a compound

• an element

Tags

NGSS.MS-PS1-1

A substance in which two or more elements are chemically combined is called a(n)

• substance

• element

• compound

• mixture

If a substance consists of only one kind of atom, it is a(an)

• Mixture

• Solution

• Compound

• Element

What do atoms with the same atomic number form?

• Elements

• Compounds

• Mixtures

Which of the above figures best illustrates a pure substance?

• figure W & X

• figure W & Y

• figure Z & X

• figure Z & W

Tags

NGSS.MS-PS1-1

Which of the above figures best represents an element?

• figure W

• figure X

• figure Y

• figure Z

Tags

NGSS.MS-PS1-1