Unit 1 Assessment Review 24/25

Why does the water not form a straight line across the surface?

• A. Attraction between the water and the glass causes adhesion of the water.

• B. Repulsion between the water and the glass causes adhesion of the water.

• C. Cohesion among water molecules causes them to move higher on the glass.

• D. Cohesion between the water and the glass causes some of the water molecules to rise.

What property allows insects to walk on water?

• Cohesion

• Adhesion

• Surface tension

• Buoyancy

Which property is crucial for the movement of water through plant stems?

• Cohesion

• Adhesion

• Surface tension

• Osmosis

What elements are involved in this chemical reaction? CaCO₃ → CaO + CO₂

• Carbon, Oxygen, Calcium

• Carbon, Cobalt, Chlorine

• Calcium, Actinium, Oxygen

• Cobalt, Chlorine, Actinium

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

As noted in the book, chlorine tablets are used in swimming pools to maintain the health of the water and the pH levels. The main reaction is: Cl₂ + H₂O → HOCl + HCl. Which components are reacting as elements, compounds or mixtures? Click all that apply.

• Cl₂ is an element

• HCl is an element

• H₂O, HOCl and HCl are compounds

• HOCl and HCl combined are a mixture

• HOCl is a mixture

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

Adhesion, cohesion, and surface tension are properties that are observed in water. What unique property of water molecules makes adhesion, cohesion, and surface tension possible?

• Water molecules are non-polar

• Water molecules have a high density

• Water molecules are polar

• Water molecules are hydrophobic

What was the mass of the empty dish?

• 158.8 g

• 164.3 g

• 168.0 g

• 150.0 g

What was the mass of the beaker with vinegar before adding baking soda?

• 175.9 g

• 280.4 g

• 284.4 g

• 300.0 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What was the mass of the beaker with the final solution after the reaction?

• 175.9 g

• 280.4 g

• 284.4 g

• 290.0 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the mass of the beaker with the final solution after the reaction?

• 175.9 g

• 280.4 g

• 284.4 g

• 290.0 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5