Properties of Water and Solutions

The hydrogen atoms in a water molecule are ________________ charged.

• not

• negatively

• neutrally

• positively

Tags

NGSS.MS-PS1-1

What molecule is this?

• calcium

• hydrogen

• helium

• water

Tags

NGSS.MS-PS1-1

Water drops being attracted to each other is an example of ____________.

• capillary action

• adhesion

• specific heat index

• cohesion

Which property of water is most responsible for plants being able to transport water from their roots to their leaves?

• The attraction between molecules

• A capacity to dissolve many substances

• The ability to form a low-density crystalline structure when frozen

• A capacity to absorb large amounts of energy as temperature increases

Tags

NGSS.MS-ESS2-4

The opening of the stomata allows water to evaporate from inside the leaf in a process known as transpiration. As this occurs, water molecules cling to one another and pull water in a continuous stream up the stem of the plant from the roots to the leaves. Which property of water makes the movement of water possible from the roots to the leaves of a plant?

• Cohesion

• Freezing point

• High specific heat

• Temperature-dependent density

Use the illustration to answer the following question.

Which of the following is a property of water that allows a water strider to walk on the surface of water?

• Solubility

• Cohesion

• High specific heat

• Low freezing point

Water is the most abundant molecule found in living organisms. Most mammals, in fact, are approximately 70% water by weight. About two-thirds of this water is present inside cells. The other one-third is present outside cells (e.g., in blood plasma or other body fluids). Why is water so important to cells?

• Almost all the chemical reactions in life processes occur in solutions with water.

• Water determines which proteins are translated from the cellular DNA.

• Water is stored in the cells to be used when the organism gets thirsty.

• The main structural component found in plasma membranes and cell walls is water.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

The freezing point of water is 0°C, and the boiling point is 100°C. This range of temperatures can be found naturally on the Earth, which means that___.

• water makes up less than 30% of the Earth's surface

• water has a very low specific heat

• water can exist in all three states on Earth

• water cannot move through the roots of plants

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Molecule that has regions of opposite partial charge.

• Carbon dioxide

• Polar molecule

• ionic compound

• opposite molecule

Tags

NGSS.MS-PS2-3

Cohesion in water is best described as -

• water molecules attracted to other things

• water molecules attracted to other water molecules

• lowering the temperature of the liquid

• breaking the crystals into smaller pieces