Experimental Design and Basic Chemistry Review Questions.

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Presentation transcript:

Experimental Design and Basic Chemistry Review Questions

Experimental Design You want to determine the effect of decreasing pH (from acid rain) on trout population in a pond. What is the independent variable and dependent variable?

How are inferences connected to observations?

TRUE or FALSE? The purpose of a control group is to provide a comparison for the results of the experimental group.

You only have your Reference Section of your Biology Binder. How would you find the number of neutrons in an element?

Where are electrons, protons and neutrons found in an atom ?

Why are valence electrons so great?

What are atoms of an element that have a different number of neutrons called? No such thing ions element nucleus isotope

What happens when an atom loses electrons?

What makes ionic and covalent bonds different from each other? Connection to Water: Ionic compounds will dissolve in water Ionic compounds will dissolve in water

TRUE or FALSE? Polar covalent bonds are the same a polar bonds.

Match the Mixtures

Compounds are bonded elements in definite proportions whose properties are physically and chemically different than the elements that make them. What is this compound Ba(Na)₂?

Write a “word equation” for a neutralization reaction.

Measurement of H+ ions High [H+] and low [-OH] Low [H+] and high [-OH] pH pH 7.5 – 8.5 intestines base pH scale acid stomach All about pH

TRUE or FALSE? Buffers are an example of the Characteristic of Life, Metabolism, because the help to maintain appropriate pH ranges.

A polar molecule shares electrons unequally. Because water is polar It has two oppositely charged ends It will dissolve lots of stuff Molecules stick to other charged substances Molecules stick to each other. All of the above

Explain cohesion and adhesion in terms of polar attraction.