UIL Science Level 2 Jack

In a phospholipid, the fatty acid tails are________________ and

the “head,” which is made of phosphate and choline,

is ____________________________ .

• hydrophobic; hydrophobic

• hydrophobic; hydrophilic

• hydrophilic; hydrophilic

• hydrophilic; hydrophobic

Which tissue is excitable, conductive, and under

voluntary control?

• skin

• skeletal muscle

• autonomic neurons

• nervous tissue

• cardiac muscle

Anything associated with a microbial pathogen that

enhances its disease-causing ability is called a/an

• antigen.

• antibody.

• etiologic agent.

• virulence factor.

• growth factor.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

The esophagus is a muscular tube that belongs to

which body organ system?

• lymphatic

• digestive

• nervous

• respiratory

• endocrine

How many atoms are in one mole of C₆H₁₄?

• 6.022 × 10²³

• 1.204 × 10²⁴

• 6.022 × 10²⁴

• 1.204 × 10²⁵

• 6.022 × 10²⁵

Tags

NGSS.HS-PS1-7

What is the molar mass of gaseous dinitrogen

tetroxide?

• 30.01 g/mol

• 44.02 g/mol

• 46.01 g/mol

• 88.04 g/mol

• 92.02 g/mol

What is the sum of the coefficients when this

chemical equation is balanced?

Fe + H₂SO₄ → Fe₂(SO₄)₃ + H₂

• 12

• 9

• 8

• 7

• 4

Tags

NGSS.HS-PS1-7

What is the mass percent iron in Fe₂O₃?

• 30.06%

• 34.97%

• 55.85%

• 69.94%

• 111.70%

How do the intermolecular forces in solid wax

compare to the intermolecular forces in molten

wax?

• Solid wax has hydrogen bonding but molten

  wax only has dipole-dipole forces.

• Solid wax has hydrogen bonding but molten

  wax only has dispersion forces.

• Solid wax has dipole-dipole attractions, but

  molten wax only has dispersion forces.

• Solid wax has dispersion forces and molten wax

  has no intermolecular forces.

• The intermolecular forces in solid wax and in

  molten wax are the same.

What is the name of the compound Cu₂O?

• copper oxide

• copper(I) oxide

• copper(II) oxide

• cupric oxide

• dicopper monoxide