Question

because of the movement of water both above and below the ground.

1. after reading about floridas landforms, eileen decides to do an experiment to find out how quickly limestone will dissolve when it is exposed to certain concentrations of vinegar (vinegar is similar to acid rain). she has three samples of limestone that are all 0.5kg. she sits each limestone sample in beakers with different concentrations of water and vinegar. she records how quickly they dissolve. what is the independent variable in her experiment? sc.6. n.1.1

a. the size of the limestone samples
c. the concentration of the vinegar and water mix
b. the time it takes for each sample to dissolve
d. the type of beakers used in her experiment

1. what impact do deltas have on floridas coastline? sc.6. e.6.1

a. deltas help protect floridas coastline by slowing down floodwaters and soaking up rain during storms.
b. deltas remove sediment from sand dunes, creating shorter beaches along the coastline.
c. deltas create land that is suitable for people to build on, so the coastline becomes more crowded with houses and development.
d. deltas do not impact floridas coastline.

Explanation:

1. In an experiment, the independent variable is the factor that is changed. Here, Eileen changes the concentration of the vinegar - water mix to see its effect on limestone dissolution. The size of limestone samples (a) and beaker type (d) are kept constant. The time to dissolve (b) is the dependent variable (changes based on the independent variable).
2. Deltas are landforms at river mouths. They act as natural buffers. They slow floodwaters and soak up rain (like a sponge), protecting the coastline. Option b is incorrect as deltas add sediment. Option c is wrong as delta land is often marshy/unstable for building. Option d is false as deltas clearly have an impact.

Answer:

1. C. The concentration of the vinegar and water mix
2. A. Deltas help protect Florida’s coastline by slowing down floodwaters and soaking up rain during storms.