CBA 6 Retest

Which statement based on the pH scale is NOT correct?

• Black coffee is more acidic than seawater.

• Lemon juice and black coffee are acids.

• Black coffee is more acidic than lemon juice.

• Seawater and baking soda are bases. wandering

Sort the properties of acids and bases.

Groups:

(a) Acid

,

(b) Bases

• Feels Sticky

• Taste Sour

• Feels Slippery

• Taste Bitter

• Alkaline

• Reacts strongly with metals

Order these liquids from most acidic to most basic.

• Battery acid pH-0

• Drain cleaner pH-14

• Baking soda pH-9

• Sea water pH-8

• Orange juice pH-3

A solution with a pH of 2 can be increased to a pH above 7 by adding

• an acid.

• water.

• a base.

• hydrogen.

Refer to the photo of water droplets hanging from pine needles. Which statement correctly describes the forces acting on the droplets of water?

• Adhesion and cohesion cause the water molecules to stick together, forming a droplet. Adhesion causes the water to stick to the pine needle, preventing droplets from falling off.

• Adhesion causes the water molecules to stick together, forming a droplet. Cohesion causes the water to stick to the pine needle, preventing droplets from falling off.

• Cohesion causes the water molecules to stick together, forming a droplet. Adhesion causes the water to stick to the pine needle, preventing droplets from falling off.

• Cohesion causes the water molecules to stick together, forming a droplet. Cohesion and surface tension cause the water to stick to the pine needle, preventing droplets from falling off. atmosphere is composed primarily of

Which statement best explains how water striders can walk on water?

• A. Water has high surface tension because the water molecules have high cohesion.

• B. Water has low surface tension because the water molecules have low cohesion.

• C. Water has high surface tension because the water molecules have high adhesion.

Identify and explain the properties of water that allows a droplet of water to form on top of a penny.

• Water has high surface tension and cohesion, allowing droplets to form.

• Water is a good conductor of electricity, allowing droplets to form.

• Water evaporates quickly, allowing droplets to form.

• Water is denser than most liquids, allowing droplets to form.

Select the location on the plant where adhesion and capillary action allows plants to intake water from the soil.

• roots

• stem

• leaf

The Sun is the most important influence on Earth’s climates. Suppose a meteor crashes into Earth’s surface and sends tons of pulverized rock material up into the atmosphere. How does this event interfere with the amount of solar energy that reaches Earth’s surface?

• It can block incoming solar energy and make the air cooler.

• It can block incoming solar energy and make the air warmer.

• It can attract more sunlight and make the daytime hours brighter.

• It can attract more sunlight and create more hours of daylight.

Carbon and carbon dioxide are added and removed from Earth's atmosphere by processes in the carbon cycle. Use the list below to place the options listed in the correct boxes.

Groups:

(a) Adds Carbon or CO2

,

(b) Removes Carbon or CO2

• Factories and Automobiles

• Photosynthesis

• Ocean Absorption

• Decaying organisms

• Animal Respiration

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3