Biology 9 - Semester 1 Review

Which is not a part of the scientific method?

• Making observations

• Proving hypothesis

• Drawing conclusions

• Designing experiments

Which is NOT one of the 8 characteristics of living things?

• Living things die

• Living things obtain and use materials and energy

• Living things respond to their environment

• Living things reproduce

What is an independent variable?

• What changes based on what I change

• What I change

• What I keep the same

• What will change independently of what I do

You are investigating the impact of the temperature at which food is stored on the rate of bacterial growth over time. What is your dependent variable?

• Temperature of the food

• Where food is stored

• Type of food

• Rate of bacterial growth over time

If you are investigating the effect of amount of sugar given to 2nd graders on their math test scores, what could be a control variable?

• Amount of sugar given to 2nd graders

• How well they do on their test

• The test scores of 2nd graders

• The math test they are given

What type of bonds does the oxygen of a water molecule have with the hydrogens of different water molecules?

• non-polar covalent

• polar covalent

• hydrogen bonds

• polar ionic

An acid is added to 2 beakers containing water solution. In beaker 1, the pH became 2; in beaker 2, pH became 4. Why?

• Beaker 1 contained a buffer

• Beaker 2 contained a buffer

• Beaker 1 contained only water

• Beaker 2 contained a salt

How many protons, electrons, and neutrons are in Lithium-6?

• 3 protons, 3 neutrons, 3

  electrons

• 3 protons, 4 neutrons, 3 electrons

• 4 protons, 3 neutrons, 3 electrons

• 3 protons, 3 neutrons, 4 electrons

How many protons, neutrons, and electrons does a sodium ion have?

• 11 protons, 12 neutrons, 11electrons

• 10 protons, 12 neutrons, 11electrons

• 11 protons, 13 neutrons, 11electrons

• 11 protons, 12 neutrons, 10electrons

How many electrons are in the valence shell of a Carbon atom?

• 2

• 4

• 6

• 8