Alka-Seltzer Rate of Weathering Questions

The relationship between surface area and weathering rate is that:

• an increase in surface area increases the weathering rate.

• an increase in surface area decreases the weathering rate.

• surface area has no effect on weathering rate.

• weathering rate only depends on temperature, not surface area.

Draw a line showing how the amount of surface area affects the amount of time to dissolve.

Crushing the tablet represents which type of weathering (physical or chemical)?

• Physical weathering

• Chemical weathering

• Both physical and chemical weathering

• Neither physical nor chemical weathering

Adding the tablets to the water represents which type of weathering?

• Physical weathering, because the tablets break down without changing their chemical composition.

• Chemical weathering, because the tablets dissolve and react with the water.

• Physical weathering, because the tablets dissolve in water.

• Chemical weathering, because the tablets break into smaller pieces without dissolving.

Tags

NGSS.MS-PS1-2

What is the purpose of using both room temperature water and hot water in this experiment?

• To observe the effect of temperature on the weathering rate of Alka-Seltzer tablets.

• To compare the solubility of Alka-Seltzer tablets in different liquids.

• To test if Alka-Seltzer tablets dissolve faster in salt water.

• To see if Alka-Seltzer tablets change color at different temperatures.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Based on your observations, the relationship between the temperature and the rate of chemical weathering is:

• As temperature increases, the rate of chemical weathering increases.

• As temperature increases, the rate of chemical weathering decreases.

• Temperature has no effect on the rate of chemical weathering.

• As temperature decreases, the rate of chemical weathering increases.

Draw a line showing how the amount of temperature affects the amount of time to dissolve.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Using a map, locate Rio de Janeiro in South America and Seattle in North America. Note that both locales have abundant precipitation, but have different temperature patterns. Which city would have a higher rate of limestone weathering, and why?

• Rio de Janeiro, because warmer temperatures increase chemical weathering rates.

• Seattle, because cooler temperatures increase chemical weathering rates.

• Seattle, because less precipitation slows weathering.

• Rio de Janeiro, because cooler temperatures slow weathering.

Which characteristic would remain the same when a limestone rock goes through extensive abrasion?

• shape of the rock

• mass of the rock

• volume of the rock

• chemical composition of the rock

Which type of weathering is most common where the average yearly temperature is 5°C and the average yearly precipitation is 45 cm?

• moderate chemical weathering

• very slight weathering

• moderate chemical weathering with frost action

• slight frost action