Water Unit

What type of bond holds water molecules to other molecules & other water molecules?

• Metallic bond

• Hydrogen bond

• Ionic bond

• Polar covalent bond

What property of water allows insects to walk on its surface?

• Surface tension

• Buoyancy

• Adhesion

• Capillarity

Define cohesion and adhesion in relation to water.

• Cohesion is the attraction between molecules of the same substance, while adhesion is the attraction between molecules of different substances.

• Cohesion is the bond between molecules of different substances, while adhesion is the bond between molecules of the same substance.

• Cohesion is the attraction between molecules of different substances, while adhesion is the attraction between molecules of the same substance.

• Cohesion is the repulsion between molecules of the same substance, while adhesion is the repulsion between molecules of different substances.

Why does water have a high specific heat capacity compared to other substances?

• Hydrogen bonding

• Covalent bonding

• Ionic bonding

• Metallic bonding

How does water's polarity contribute to its ability to dissolve many substances?

• Water's polarity repels other substances, preventing them from dissolving.

• Water's polarity enables it to interact with other polar or charged substances through hydrogen bonding, facilitating the dissolution process.

• Water's polarity causes it to form strong covalent bonds with substances, inhibiting dissolution.

• Water's polarity makes it chemically inert, limiting its ability to dissolve substances.

What are some common sources of water pollution?

• Air pollution

• Industrial discharge, agricultural runoff, sewage and wastewater, oil spills, littering

• Deforestation

• Household cleaning products

Name a few important water resources for human use.

• Ponds

• Desalination plants

• Rivers, lakes, reservoirs, groundwater, oceans

• Glaciers

Explain the water cycle and its importance in nature.

• The water cycle is a man-made process that has no impact on nature.

• The water cycle only affects marine life and has no relevance to terrestrial ecosystems.

• The water cycle is a myth created by scientists to confuse the general public.

• The water cycle is essential for sustaining life on Earth by ensuring the availability of freshwater and regulating the climate.

What is the Chesapeake Bay Watershed and why is it significant?

• The Chesapeake Bay Watershed is insignificant because it has no impact on the environment

• The Chesapeake Bay Watershed is the area of land that drains into the Chesapeake Bay, encompassing parts of six states and Washington D.C. It is significant because it is the largest estuary in the United States and plays a crucial role in supporting diverse ecosystems, providing habitat for various species, and serving as a vital economic resource for fishing and tourism.

• The Chesapeake Bay Watershed is located in the Midwest region of the country

• The Chesapeake Bay Watershed is a man-made canal in the United States

How does water's surface tension allow some insects to float on water?

• Water's surface tension allows insects to float by repelling them from the water's surface.

• Insects float on water due to the heat generated by water's surface tension.

• Some insects float on water because water's surface tension creates air bubbles around them.

• Water's surface tension allows some insects to float on water by creating an invisible film on the surface that can support their weight.