You want to see if the size of the chalk affects the reaction to vinegar. You have three pieces of white chalk that are 3cm, 6cm, and 9cm in length.
You put each of the pieces of chalk in 30mL of white vinegar.
You measure the height of the bubbles every 5 seconds for 60 seconds and record your results in a table.

What is your independent variable (the thing that you are testing)?

What is your dependent variable (the thing you are measuring)?


What are two constants that you should be sure are the same in all your set-ups to make sure it is a fair test?




What are some things that cause chemical weathering of rocks?


PZZZ answer I will vote brainliest

Study guide for unit 2 ~ lesson 3 ,4, & 5 test, thursday, january 24th lesson 3 vocabulary erosion - deposition - landform- weathering- short answers 1. how do volcanic islands form? 2.why is deposition likely to occur outside a river bend? 3. in what conditions does soil form fastest? 4. which 2 earth’s systems interact to form a coral island? 5. a beach growing in size is most likely the result of 6. which type of islands are formed when a chunk of land breaks off from a larger landmass? long answers explain how plants can grow in small cracks of rock that do not appear to contain soil. lesson 4 vocabulary pollution - toxic - short answers 1. most farmers pollute soil by purposefully adding 2. what is the benefit of contour plowing? . 3. using nuclear power to produce electricity can cause water pollution by 4. why do scientists predict humans will run out of fossil fuels someday? 5.farmer spray crops with fertilizer and weed killer to the crops grow. how might this affect the hydrosphere? list two different ways you use fossil fuels. 1- 2- what are two other energy sources scientists and engineers are researching? 1- 2- lesson 5 vocabulary decompose- recycling - short answers 1. which of earth’s systems do you interact with when you wash your hands? 2. which of earth’s systems is polluted by exhaust gases from buses pollute? 3. why is it important to dispose of electronic devices properly? 4. where do people interact with all four of earth’s systems?

Acountry’s gdp is the total dollar value of all final goods and services produced within a country’s borders in a given year. it also determines how countries are classified. which of the following is not a classification based on gdp? a. developed b. developing c. least-developed d. potentially developing

How might the effects of el niño impact forests in the united states? a) it could cause hurricanes that would destroy forests in oregon. b) it could cause droughts which would make forest fires more likely. c) it could cause an increase in mold that could kill large amounts of trees. d) it could cause an increase in the length of the wet, rainy seasons in the northwest.