Unit 2 Test Review (2026)

• oxygen, hydrogen

• hydrogen, oxygen

• hydrogen, hydrogen

• oxygen, oxygen

Ice is less dense than liquid water, why would this be important for organisms that live in ponds? (Choose all that apply)

• It keeps the water from freezing solid so the organisms can live in the pond during cold seasons

• The water freezes from the bottom up & organisms can live over the ice

• The ice keeps the water beneath it warmer then the outside air

• The ice is not less dense than liquid water

Tags

NGSS.HS-ESS2-5

Why is it important for our human bodies to have water with high specific heat capacity?

• It keeps humans from becoming dehydrated

• It helps keep body temperatures in the normal range to maintain homeostasis

• It helps to keep joints lubricated

• It helps to maintain the correct density of cells for metabolism

Tags

NGSS.HS-LS1-3

Which of these is a correctly drawn water molecule?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Match the following correct facts about WATER!

• Water

• Surface tension occurs because of:

• Cohesion

• These do NOT dissolve in water!

• H2O

• The correct way to write water

• Oil, fats, waxes

• Universal Solvent

Tags

NGSS.HS-ESS2-5

Water is considered a "Universal Solvent" because it can dissolve many substances. The property that allows water to dissolve many substances is its -

• High specific heat

• Polarity

• Density

• Surface tension

Tags

NGSS.MS-PS1-2

Which correctly describes the monomers that are linked to create polymers?

• monosaccharides are linked to make DNA

• carbohydrates are linked to make proteins

• nucleotides are linked to make DNA

• fatty acids are linked to make proteins

Tags

NGSS.HS-LS1-6

Which biomolecule does not have a carbon-nitrogen bond?

• protein

• peptide

• nucleic acid

• carbohydrate

Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy? 

• Proteins
• Nucleic Acid
• Lipids
• Carbohydrate

You need a steady supply of amino acids in your diet to maintain a healthy body. In order to meet this need, you should make sure you eat enough of which of these substances?

• Carboyhdrates

• Proteins

• Nucleic Acids

• Lipids

Tags

NGSS.HS-LS1-6

NGSS.HS-LS1-1